15 CREDITS, BASIC LEVEL 300
Streamlining of Hydraulic Testing
Authors: Henrik Hardell & Niclas Lind
ii
den avancerade utrustningen saknats. Syftet med detta examensarbete var därför att
effektivisera denna del av ST Aerospace:s verksamhet genom att dels skriva om manualers
testavsnitt men även att tillverka en lättförståelig beskrivning av verkstadens testutrustning
i utbildningssyfte.
Genom att följa operatörerna i deras arbete med av företaget utvalda komponenttester
kunde en grundläggande förståelse både för testbänken men även för de utvalda testerna
erhållas. Erfarenheten från testningen användes till att producera en lättförståelig
beskrivning av provbänken samt till omskrivning av de utvalda komponentmanualerna.
Utöver utbildningsmaterialet producerades totalt fyra omskrivna komponentmanualer för
ST:s räkning.
Då syftet med arbetet var att effektivisera hela ST:s provningsverksamhet är det i
efterhand tveksamt till om angripningssättet av effektiviseringsproblemen varit rätt.
Alltefter arbetets gång insågs i ökande grad att ett mer lämpligt angripningssätt hade varit
att lägga all arbetstid på utbildningsmaterialet till provbänken för att på så sätt förenkla de
framtida omskrivningarna av komponentmanualer. Ett mer utförligt utbildningsmaterial till
testutrustningen kan effektivisera produceringen av omskrivna komponentmanualer
betydligt då företaget i dagsläget testar hundratals komponenter.
iii
that the shop uses. A lack of suitable training material also causes problems for new
operators.
The purpose of this thesis work was therefore to streamline this part of
ST Aerospace’s operation, first by rewriting the test section of the manuals but also to
produce a basic description of the test bench that is used in the testing activities.
By studying the operator’s work with component testing a fundamental understanding
of the test bench was obtained along with the specific knowledge that was required in order
to rewrite the manuals to a version that ST can use with their specific test equipment.
Along with the training material a total of four rewritten component manuals were
pro-duced on ST’s behalf.
Since the purpose of this work was to streamline the company’s entire testing
business, there are post-doubts about whether the correct way to address the issue was
chosen. As the work continued it became increasingly more obvious that a more
appropri-ate way of handling the efficiency problems should have been to fully focus on the training
material for the test bench. By performing the work this way around the future rewriting of
the hundreds of component manuals can be drastically simplified and more efficient,
therefore the time required for rewriting can be drastically reduced.
vi
2. Metod ... 3
3. Resultat ... 5
4. Diskussion ... 6
5. Slutsatser ... 7
6. Rekommendationer ... 8
7. Tack ... 9
8. Referenser ... 10
9. Bilagor ... 11
1
speciell testbänk som ST använder. Som underlag för dessa tester används
testbeskrivningar som komponenttillverkaren själv skapat eftersom tillverkaren också,
utöver tillverkning, även bedriver egen underhållsverksamhet.
I sin testverksamhet använder sig ST av särskilda testbänksoperatörer, så kallade
provare. Detta är inget krav från myndigheter eller kunder men då testerna i många fall är
mycket avancerade är det ofta lämpligt.
1.2.
Syfte
Då testningen av komponenter är en stor flaskhals i ST:s produktion vill företaget
effektivisera denna för att öka sin produktivitet. Effektiviseringen ska åstadkommas genom
att förtydliga och anpassa testinstruktionerna till den aktuella testutrustningen som
prova-ren använder. Genom omskrivningar av testinstruktioner är tanken att flera provare på ett
enklare sätt ska ha möjlighet att använda testbänkens grundläggande funktioner, vilket har
syftet att bidra till den ökade effektiviteten. Vidare ska omskrivningarna leda till en
tidsbesparing för hela verksamheten i allmänhet och för provarna i synnerhet.
Utöver nämnda testinstruktioner med syfte att förenkla och effektivisera efterfrågades
även en beskrivning av själva testbänken. Syftet med beskrivningen var att denna ska
fungera som ett komplement till testinstruktionerna genom att ge läsaren en enkel inblick i
bänkens hantering samt funktionella uppbyggnad.
1.3.
Problemställning
Provarna upplever problem vid testerna då en stor del av tiden går åt till att tolka
tillverkarens beskrivningar och översätta dessa till den aktuella testbänken. Det är ofta
förekommande att det uppstår frågetecken kring hur bänken ska användas för att uppnå
avsett resultat i testningen. Utöver denna tolkning upplever provarna ibland tillverkarens
testbeskrivningar som både ofullständiga, felaktiga och komplicerade.
Störningar i produktionen uppstår hos ST eftersom tillverkaren använder sig av en
annan typ av testutrustning och testningsförfarande, vilket leder till att tillverkarens
testbeskrivningar i många fall är svårbegripliga. Denna skillnad härstammar från de
olikheter som finns mellan de europiska och amerikanska metoderna att testa
komponenter.
1.4.
Avgränsningar
Initialt var arbetsbelastningen under de angivna 10 veckorna realistisk men ur flera
aspekter har arbetet på ST behövt avgränsas och anpassas alltefter arbetet fortskridit. Då
företaget har flertalet testbänkar med mer eller mindre komplett dokumentation samt
2
lättöverskådligt sätt att producera beskrivningarna hade arbetats fram. När detta lämpliga
och smidiga arbetssätt funnits stod det på ett mer överskådligt vis klart ungefär vad som
kunde tänkas hinna med under projektets återstående tid. Ett realistiskt slutmål sattes
därför till cirka 4-6 komponenter samt en bänkbeskrivning av enklare karaktär för
återstående tid av arbetet.
Även arbetssättet fick anpassas och begränsas beroende på vilken komponent som
behandlades. De tre initiala komponenterna hade karaktär av lägre komplexitet vilket
gjorde dessa mer lämpade för en nybörjarprovare. Dessa beskrivningar till
nybörjarkom-ponenterna skrevs utförligt med avsikt att en helt oerfaren provare skulle ha möjlighet att
förstå och sätta sig in i det specifika testet.
Den efterföljande komponenten, en noshjulsstyrning till B737NG, var den i särklass
mest avancerade komponenten med de allra mest omfattande testerna. Dessa skillnader i
komplexitet och skillnader i lämplighet som instegskomponenter för nya provare gjorde att
testbeskrivningarna skrevs på olika avancerad nivå. Avgränsningen för noshjulsstyrningen
var dels en effekt av den begränsade tidsrymden i examensarbetet men även ett sätt för ST
att erhålla en mer avpassad nivå av noshjulsstyrningens testbeskrivning. En något mer
kortfattad beskrivning passar en mer avancerad komponent bättre då den ofta är avsedd för
en mer erfaren provare.
Testbänken som arbetet utfördes på saknade uppmärkning av de olika knappar och
reglage som används för testerna. Då testbeskrivningarna var omöjliga att utföra utan
uppmärkning gjordes på grund av tidsbrist en temporär uppmärkning av reglagen. En
permanent och mer logisk uppmärkning skulle ta alltför lång tid i anspråk då bänkens
hydrauliska kopplingsschema inte var helt uppdaterat efter bänkens alla ombyggnationer.
3
närvaro vid flertalet testningstillfällen skapades också den grund som behövs för att
strukturera arbetet och att för att bestämma hur arbetet och problemet ska angripas.
För att få en något djupare inblick i testbänkens uppbyggnad och funktion fanns
tidigare skriven dokumentation
2att tillgå. Denna beskrivning var väldigt detaljerad och
djupgående men kunde trots allt användas som ett komplement i arbetet.
Genom samrådan med ST’s ledning bestämdes vilka komponenter som var aktuella
att skriva testinstruktioner för samt vilken testbänk som skulle prioriteras. Valet föll på
komponenter som är vanligt förekommande för testning och som inte anses vara berörda
av det utfasningsarbete som ST bedriver.
Eftersom testbänken saknade uppmärkning fanns inga namn på kranar och portar att
hänvisa till i testinstruktionerna. På grund av detta gjordes en temporär uppmärkning med
klisterlappar där testbänkens diverse funktioner namngavs.
För att förbereda inför komponenttesterna lästes testavsnittet i komponenternas
manual (CMM) igenom. Detta för att förstå hur komponenten testas och vad testerna
innefattar.
För att samla det underlag som krävs för att skriva testinstruktionerna användes
papper och penna för att dokumentera testerna då dessa utfördes av provaren. Det exakta
förfarandet antecknades så noga det var möjligt. Oklarheter och testmoment diskuterades i
en kontinuerlig dialog mellan examensarbetare och provare. För att underlätta skrivandet
och som komplement till testinstruktionerna, fotograferades viktiga moment allt eftersom
testningen
fortskred.
Som
ytterligare
kompletterande
material
gjordes
även
ljudupptagningar vid testningstillfällena.
Efter att allt underlag samlats in kunde skrivandet av själva testinstruktionerna
påbörjas. Vid skrivandet användes det inhämtade underlaget tillsammans med CMM:en
som referens men även som stöd för att inte innebörden skulle gå förlorad. I flera fall
stämde CMM:ens instruktioner överens med hur testningen hade genomförts i praktiken.
Även språk och formuleringar från CMM:en var till nytta i skrivandet.
Initialt fördes diskussioner kring hur examensarbetets testinstruktioner skulle byggas
upp och om de skulle fungera som fristående dokument eller ej. En ej fristående modell
hade krävt CMM:en som direkt komplement för att genomföra testningen, då
testinstruktionerna i detta fall endast skulle behandla det som avviker från CMM:en. Vid
denna lösning skulle provaren vara tvungen att använda sig av två separata dokument
vilket ansågs vara en potentiell källa till förvirring. Svårigheten med att sy ihop
mellanrummet mellan den ej fristående testinstruktionen och CMM:en var något som
avgjorde till den fristående modellens fördel. Valet av den fristående modellen gör att
provaren kan testa komponenten helt och hållet enligt de skrivna instruktionerna i ett
dokument. Detta under förutsättning att hänvisning till CMM:en finns på de delar där det
2 Provbänk SAS 614-000-122
4
arbete med varje ny komponent.
5
som referens.
I varje testinstruktion finns en del som innehåller information om den utrustning som
krävs för att provarna på ST ska kunna genomföra testningen. Vid testning av
komponen-ter krävs att vissa omständighekomponen-ter är uppfyllda, dessa är i praktiken oförändrade varför
endast en hänvisning till CMM finns inlagd i de omarbetade testinstruktionerna.
För att ej behöva upprepa återkomande procedurer i varje deltest lades ett särskilt
kapitel in i dokumentet där vanligt förekommande procedurer förklarades. Detta gör att
deltesterna kan hållas kortare och mer överskådliga då enbart en hänvisning till
procedurerna krävs. Inför varje deltest finns en hänvisning till vilken paragraf deltestet är
baserat på.
Vid testning av komponenter använder provaren ett dokument framtaget av ST’s
ingenjörsavdelning, kallat ”Maintenance Work Sheet” (MWS). Detta är ett protokoll för att
fylla i resultaten av de olika stegen i testningen baserat på aktuell CMM. För att underlätta
för provaren och att göra denne uppmärksam på när under testningen som ett värde ska
antecknas i MWS-protokollet, lades särskilda hänvisningar till detta in i
testinstruktion-erna. Dessa hänvisningar markerades sedan gråa för att göra provaren ytterligare
uppmärksam.
För att underlätta ingenjörsavdelningens revidering av testinstruktionerna vid
fram-tida CMM-uppdateringar gulmarkerades alla värden. De färdiga testinstruktionerna
innehåller även flertalet bilder som kan underlätta för att förstå vad som ska utföras och på
vilket sätt.
Bänkbeskrivningen innehåller en inledande del med sådant som är bra att känna till
för att göra testningen säker och effektiv. I följande kapitel beskrivs bänkens historia och
bakgrund. Huvuddelen av dokumentet är en allmän, enkel förklaring av hur testbänken
fungerar och är uppbyggd. Detta kompletteras med en ritning över testbänkens viktigaste
delar som en provare bör känna till för att utföra de allra enklaste testen. Avslutningsvis
innehåller bänkbeskrivningen instruktioner för vanligt förekommande procedurer som
genomförs vid testning samt en förklaring av vissa enskilda delar och funktioner hos
testbänken.
6
detaljerad bänkbeskrivning för att därav kunna ge nya provare en grundläggande och bättre
förståelse för hur testbänken fungerar.
Att låta en oerfaren provare med begränsade kunskaper om testbänken utföra testning
på en komponent utifrån våra testinstruktioner kan fungera om allt går som förväntat. Vår
erfarenhet av den tid vi spenderat på ST tyder dock på att oförutsedda problem ofta
uppstår. Testinstruktionerna som vi skrivit ger inget stöd till hur uppkomna problem kan
lösas utan istället lämnas då den oerfarna provaren helt utan kunskap om vad denne ska
göra för att lösa situationen.
Under den begränsade tidsperioden på tio veckor fanns ej utrymme för att producera
någon utförlig bänkbeskrivning. Testbänken är alltför avancerad för att denna korta tid
skulle kunna generera en komplett och heltäckande dokumentation av denna. Vi fick
istället fokusera på att beskriva den allra mest grundläggande funktionen hos bänken.
Bänkbeskrivningen kan ses som ett introduktionsmaterial för nya provare men beskriver
långt ifrån hela bänkens funktion.
Vid detta examensarbetes början insåg varken vi och förmodligen ej heller ST den
omfattning och tidsåtgång det skulle krävas för att skapa testinstruktioner enligt den typ
som företaget hade önskemål om: Tanken om att hinna med tiotals komponeter fick tidigt
strykas och vi fick istället inrikta oss på att ta oss an en komponent i taget och producera
instruktioner för så många tester vi skulle hinna med.
Flertalet faktorer bidrog till den höga tidsåtgången. I samband med testerna tar det till
exempel extra mycket tid i anspråk då provaren måste ägna tid åt att utförligt förklara de
olika testmomenten. Detta gör att testernas normala tidsåtgång ökar kraftigt. Vidare är det
ej möjligt att under testningens gång anteckna ett färdigt testinstruktionsresultat. Vi fick
istället inrikta oss på att anteckna enkelt och effektivt men ändå hålla oss på en sådan hög
nivå att vi senare helt och hållet skulle förstå hur vi skulle skriva testinstruktionerna.
Trots det noga antecknandet kunde testinstruktionerna inte skrivas med enbart
anteckningarna som grund. Vi upptäckte då att vår inhämtade kunskap för hur testbänken
fungerade kom till nytta. Genom kännedom om bänkens funktion kunde vi dra slutsatser
om hur vi skulle skriva på de stycken där våra anteckningar var bristfälliga. Utifrån vår
kunskap om testbänken kunde vi även till viss del verifiera instruktionernas korrekthet.
Tyvärr fanns ej tid till att verifiera testinstruktionerna tillsammans med provarna eller
att låta provarna testa komponeter utifrån dessa. Då tid för verifiering ej fanns kan vi inte
garantera att testinstruktionerna är helt utan felaktigheter. Tvärtom är det mest troligt att fel
eller andra oklarheter finns i något avsnitt av instruktionerna på grund av dess komplexitet.
Förmodligen hade det varit intressant att få instruktionerna verifierade under arbetets gång
för att på så sätt få en bekräftelse på att instruktionernas struktur är lämpliga.
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hydraulisk provning på egen hand utföra testning är (om ens genomförbart) både
olämp-ligt, ineffektivt och kvalitetssänkande.
8
utmärkt utbildningsmaterial för nya provare. Syftet med denna dokumentering av bänken
är att de nya provarna blir insatta i bänkens grundfunktion och därmed inte behöver
testinstruktioner för varje komponent vara beskrivna på samma grundläggande nivå.
Om författarna till kommande testinstruktioner kan förutsätta en viss grundkunskap
hos provarna kan de cirka 170 testinstruktionerna skrivas betydligt enklare vilket skulle
spara enormt mycket tid i testningsverksamheten men även för de personer som åläggs
översätta alla CMM:ers testinstruktioner.
Genom att låta ett utvalt antal personer på ett gediget sätt förstå bänkarnas
grundfunktion hellre än att slaviskt följa en exakt testinstruktion kommer förutom
effektiviteten även kvalitén i testningsverksamheten förbättras avsevärt.
Avslutningsvis utifrån de erfarenheter som arbetet givit blir rekommendationerna till
ST att:
1.
Tillverka utförliga utbildningsmaterial till varje testbänk.
2.
Utse ett fåtal personer som får sätta sig in i testverksamheten med hjälp
av utbildningsmaterialet på varje testbänk.
3.
Tillverka betydligt mer förenklade testinstruktioner utifrån det utförliga
utbildningsmaterialet. Dessa förenklade testinstruktioner kan användas
som stöd för testningsverksamheten till mer insatta provare.
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Vi vill slutligen rikta ett stort tack till Jimmy Gustavsson för all den tid du lagt ner för
att göra detta examensarbete möjligt. Utan din hjälpsamhet och förståelse hade det inte
varit möjligt att utföra detta arbete.
10
(Nov 1 /94)
4
CMM 32-40-15, Fuse Assembly, GE Aviation
5
CMM 22-21-04, Yaw Damper Servo, Nabtesco, (rev. no. 4, May /2010)
6
CMM 32-50-17, Nose Wheel Steering Actuator, Parker, (rev. no. 15, Dec 22
/2010)
11
(baserad på CMM 22-21-04
5)
D.
Test Instructions, Nose Wheel Steering Actuator
(baserad på CMM 32-50-17
6)
Maintenance Work Sheet
EM56-20 Motor Operated Gate Shutoff Valve for
TABLE OF CONTENTS
1. Test description ... 1
2. Equipment needed for testing ... 1
A. General
... 1
B. Equipment
... 1
3. Test Conditions ... 2
4. General Procedures Regarding Testing ... 2
A. General
... 2
B. Repetitive Procedures
... 2
(a) Installation A ... 2
(b) Installation B ... 3
(c) Test box 29-11-01 Installation and Operation ... 4
(d) Air Bleeding Method 1, System 1 (via component valve) ... 5
(e) Air Bleeding Method 2 (via cap) ... 5
5. Test Procedure ... 6
A. General
... 6
B. Testing
... 7
(a) Differential Pressure Test ... 7
(b) Proof Pressure Test ... 8
(c) Internal Leakage Test ... 10
(d) Thermal Relief Valve Test ... 11
(e) Power Operation and Actuation Time ... 13
(f)
Starting Current ... 18
(g) Continuity Test ... 19
(h) Bonding Resistance Test ... 24
1
1. Test descriptionThis is a description of the test procedure for the EM56-20 Motor Operated Gate Shutoff Valve Assembly for performing the tests in test bench
"Bettan".
The following description refers to CMM 29-11-01, chapter “TESTING AND FAULT ISOLATION”. CMM 29-11-01 shall always be used along with this test sheet.
2. Equipment needed for testing A. General
According to "Test Equipment and Materials" in CMM 29-11-01 the tests require more equipment than the following specified list. Equipment not mentioned is built in test bench.
B. Equipment
Nr Name Serial Quantity
required
Notes
1 Yellow Box 29-11-01 1 2 Compressor 614-500-0004 1 3 Test Box 29-11-01 1
4 AN-MS-16 Standard item 2 90-dgr Connection Pipe 5 Mounting Plates - 1 set
6 Cap Standard item 1 Size 16
7 T-pipe Standard item 2 All side connections caped
8 Air Nipple SAS nr 475368-1
1 9 Blue High Pressure
Hose (HP Hose)
Standard item 1 Replaceable with LP Hose if desired
10 Timer Standard item 1 Regular watch with second hand
11 Resistomat TYP 2302
612-211-0103 1
12 Simpson 612-310-80 1 Volt/Ohm/Millammeter 13 General Air Supply Standard item 1
2
3. Test ConditionsAccording to “Test Conditions” in CMM 29-11-01 chapter “TESTING AND FAULT ISOLATION”.
4. General Procedures Regarding Testing A. General
(a) In this paragraph there are descriptions of standard setups and procedures required to perform the
testing. The testing is based upon knowledge of the following procedures and therefore the test
instructions are referring to this paragraph at several occasions.
(b) If desirable/necessary, test bench shutoff procedure can be executed after each subtest. The instructions regarding all subtests assume that test bench is shutoff when the subtests begin.
(c) Air bleeding shall always be executed after each and every refitting of the component's hydraulic
connections.
B. Repetitive Procedures
(a) Installation A
This installation describes how to pressurize the component's port A while keeping port B open to the atmosphere. The installation may be executed with the test bench in ON or OFF condition.
1. Verify that valve SPS1 is closed and that valve BTR1 is open.
2. Connect Connection Pipe AN-MS-16 [4] to Supply Port SP1.
3. Install the component between the Mounting Plates [5] according to figure 1.
3
4. Connect the assembly so that the port A side is facing the Supply Port SP1.
(b) Installation B
This installation describes how to pressurize the component's port B while keeping port A open to the atmosphere. The installation may be executed with test bench pumps in ON or OFF condition.
1. Verify that valve SPS1 is closed and that valve BTR1 is open.
2. Connect Connection Pipe AN-MS-16 [4] to Supply Port SP1.
3. Install the component between the Mounting Plates [5] (mirrored according to figure 1.)
4. Connect the assembly so that the port B side is facing the Supply Port SP1.
4
(c) Test box 29-11-01 Installation and Operation
1. Connect the test box's cables to the component as following (figure 2):
RED - connector pin A BLUE - connector pin B BROWN - connector pin C WHITE - connector pin D BLACK - connector pin E
2. Connect the test box to the test bench XS-35 connector. When connected, it can be operated as following:
OPEN: Set circuit breaker to "OPEN POS1".
CLOSE: Set circuit breaker to "CLOSE POS2".
MID-POSITION: When the valve is moving, set
circuit breaker to neutral position when desired valve position is reached.
5
(d) Air Bleeding Method 1, System 1 (via component valve)
Component needs to be installed according to Test Installation A or Test Installation B. Test Box 29-11-01 [3] needs to be installed.
1. Verify that valve BTR1 is open and that all other valves are closed.
2. Open EM56-20 valve using the Test Box [3].
3. Open valve SPS1 slowly until fluid is flowing through the component.
4. Alternate the EM56-20 valve between fully open and fully closed position 4-5 times. The bleeding is now complete.
Remember to bleed air from the component before pressurizing.
(e) Air Bleeding Method 2 (via cap)
Component needs to be installed according to
Installation A or Installation B. Test box 29-11-01 [3] needs to be installed.
1. Attach Cap [6] a couple of turns to the port open to the atmosphere.
2. Open EM56-20 valve using the test box. 3. Open valve SPS1 slowly.
4. Bleed air out of the component by pressing the top end of the cap (figure 3). The fluid will now start to flow out of the cap, let it flow for a couple of seconds.
6
5. Screw the cap all the way in and tighten. The bleeding is now complete.
5. Test Procedure A. General
(a) All tests in this paragraph are adapted to test bench “Bettan” and produced with CMM 29-11-01 as reference. The reference document, CMM 29-11-01, shall under all circumstances be used along with all test procedures following.
(b) In this paragraph there are several grey marked “Test No”. This is a direct reference to CMM
29-11-01. The “Test No” shall also be used along with the test paragraphs of MWS29-11-01-CS.
7
B. Testing(a) Differential Pressure Test
This test is according to CMM 29-11-01, chapter “TESTING AND FAULT ISOLATION”, paragraph 4.A. CAUTION: DO NOT SUBMERGE THE COMPONENT BEFORE
PRESSURIZATION.
1. Install the component between the Mounting Plates [5], with T-pipes [7] on each side (figure 4).
2. Unscrew the pressurization hole screw from the component and replace it with the Air Nipple [8]. 3. Connect the General Air Supply [13] to the Compressor
[2].
4. Connect the Compressor [2] to the Air Nipple [8].
8
5. Pressurize the component by adjusting the regulator on the Compressor [2] until the manometer is reading 14 psig.
6. Fill Yellow Box [1] with water and submerge the component and hold for 2 minutes.
7. Verify there is no air leakage. - Test No 4.A
(b)Proof Pressure Test
This test is according to CMM 29-11-01, chapter “TESTING AND FAULT ISOLATION”, paragraph 4.B.
WARNING: ACCORDING to 4.B(3) in CMM, "THROTTLE VALVE" SHOULD ALWAYS BE CLOSED. IN TEST BENCH "BETTAN", THIS CORRESPONDS TO VALVE BTR1 WHICH SHALL BE OPEN
NOTE: Interport leakage may occur at the port open to the atmosphere due to flow through body relief valve. Interport leakage shall not be cause for rejection.
1. Install the component according to Installation B. 2. Connect Test Box [3].
3. Open valve BTR1 and close valve SPS1 before proceeding to pump startup procedure.
4. Start 20 gpm pump.
5. In the software, set "V set" to 28.0 Vdc.
6. Execute Air Bleeding Method 1. Verify that valve SPS1 is open after bleeding is complete.
7. Close EM56-20 valve.
9
8. Slowly close valve BTR1 until BP224 is reading 200 psig. Hold for 2 minutes.
9. Depressurize by opening valve BTR1 and closing valve SPS1.
10. There shall be no damage, deformation or external leakage. - Test No 4.B(4)
11. Install the component according to Installation A. 12. Execute Air Bleeding Method 1. Verify that valve SPS1
is open after bleeding is complete. 13. Close EM56-20 valve.
WARNING: DO NOT ALLOW PRESSURE TO EXCEED 220 psig.
14. Slowly close valve BTR1 until BP224 is reading 200 psig. Hold for 2 minutes.
15. Depressurize by opening valve BTR1 and closing valve SPS1.
16. There shall be no damage, deformation or external leakage. - Test No 4.B(3)
17. Open EM56-20 valve.
18. Attach Cap [6] a couple of turns to port B.
19. Execute Air Bleeding Method 2. Verify that valve SPS1 is open after bleeding is complete.
20. Slowly close valve BTR1 until BP224 is reading 200 psig. Hold for 2 minutes.
21. Depressurize by opening valve BTR1 and closing valve SPS1.
22. There shall be no damage, deformation or external leakage. - Test No 4.B(5)
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(c)Internal Leakage TestThis test is according to CMM 29-11-01, chapter “TESTING AND FAULT ISOLATION”, paragraph 4.C.
1. Install the component according to Installation A. Let port B be situated in a slightly lower vertical
position than port A. 2. Connect the Test Box [3].
3. Open valve BTR1 and close valve SPS1 before proceeding to pump startup procedure.
4. Start 20 gpm pump.
5. In the software, set "V set" to 28.0 Vdc.
6. Execute Air Bleeding Method 1. Verify that valve SPS1 is open after bleeding is complete.
7. Close EM56-20 valve.
8. Slowly close valve BTR1 until Inlet Pressure is reading 50 psig. Hold for 3 minutes.
9. Measure the internal leakage through the valve; shall not exceed 10 drops per minute. - Test No 4.C(4) NOTE: There shall be no external leakage.
10. Depressurize by opening valve BTR1 and closing valve SPS1.
11. Open EM56-20 valve to let remaining pressure out. 12. Install the component according to Installation B.
Let port A be situated in a slightly lower vertical position than port B.
13. Execute Air Bleeding Method 1. Verify that valve SPS1 is open after bleeding is complete.
11
14. Close EM56-20 valve.
15. Slowly close valve BTR1 until Inlet Pressure is reading 50 psig. Hold for 3 minutes.
16. Measure the internal leakage through the valve; shall not exceed 10 drops per minute. - Test No 4.C(6) NOTE: There shall be no external leakage.
17. Depressurize by opening valve BTR1 and closing valve SPS1.
18. Cycle the EM56-20 valve to let remaining pressure out. Close the valve when finished.
(d)Thermal Relief Valve Test
This test is according to CMM 29-11-01, chapter “TESTING AND FAULT ISOLATION”, paragraph 4.D. 1. Install the component according to Installation B. 2. Connect the Test Box [3].
3. Open valve BTR1 and close valve SPS1 before proceeding to pump startup procedure.
4. Start 20 gpm pump.
5. In the software, set "V set" to 28.0 Vdc.
6. Execute Air Bleeding Method 1. Verify that valve SPS1 is open after bleeding is complete.
7. Close EM56-20 valve.
8. Slowly close valve BTR1 until Inlet Pressure is reading 100 psig.
9. Verify flow from port A exceeds 5 drops per minute. - Test No 4.D(3)
12
10. Open valve BTR1 until Inlet Pressure is reading 70 psig.
11. Using a graduated cylinder, verify leakage from port A does not exceed 5 cc during a two minute waiting period. Immediately continue to Step 12.
- Test No 4.D(5)
12. Leakage during the following one minute from port A shall not exceed 10 drops per minute.
- Test No 4.D(6)
13. Slowly close valve BTR1 until Inlet Pressure is reading 110 psig.
14. Using a graduated cylinder, verify flow at port A exceeds 50 cc per minute. - Test No 4.D(8)
15. Depressurize by opening valve BTR1 and closing valve SPS1.
16. Cycle the EM56-20 valve to let remaining pressure out. Close the valve when finished.
17. Install the component according to Installation A. 18. Execute Air Bleeding Method 1. Verify that valve SPS1
is open after bleeding is complete. 19. Close EM56-20 valve.
20. Slowly close valve BTR1 until Inlet Pressure is reading 100 psig.
21. Verify flow from port B exceeds 5 drops per minute. - Test No 4.D(11)
22. Open valve BTR1 until Inlet Pressure is reading 70 psig.
23. Using a graduated cylinder, verify leakage from port B does not exceed 5 cc during a two minute waiting period. Immediately continue to Step 24.
13
- Test No 4.D(13)
24. Leakage during the following one minute from port B shall not exceed 10 drops per minute.
- Test No 4.D(14)
25. Slowly close valve BTR1 until Inlet Pressure is reading 110 psig.
26. Using a graduated cylinder, verify flow at port B exceeds 50 cc per minute. - Test No 4.D(16)
27. Depressurize by opening valve BTR1 and closing valve SPS1.
28. Cycle the EM56-20 valve to let remaining pressure out. Close the valve when finished.
(e) Power Operation and Actuation Time
This test is according to CMM 29-11-01, chapter “TESTING AND FAULT ISOLATION”, paragraph 4.E. NOTE: This test requires that both of the test bench's main pumps are running. If the test bench is running in single pump mode, shutoff pump before proceeding.
CAUTION: THROUGHOUT THE POWER OPERATION AND ACTUATION TIME TEST, DO NOT ALLOW PRESSURE TO EXCEED 100 psig (689.5 KPA) WHEN VALVE CLOSES. DAMAGE TO VALVE FACESEAL MAY
RESULT.
WARNING: THE PROCEDURE DESCRIBED IN CMM 29-11-01 PARAGRAPH 4E2/4E3 IS NOT ADAPTED TO TEST BENCH "BETTAN". FOLLOWING CMM'S PROCEDURE IN THIS PARAGRAPH WILL RESULT IN DAMAGE TO THE COMPONENT DUE TO EXTREMLY HIGH PRESSURE WHEN THE EM56-20 VALVE CLOSES.
1. Install the component according to Installation A. 2. Connect Connection Pipe AN-MS-16 [4] to port RTTFM.
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3.
Connect Blue HP Hose [9] between Connection Pipe AN-MS-16 [4] and component's port B (figure 5).4.
Connect the Test Box [3].CAUTION: THROUGHOUT THE FOLLOWING START PROCEDURE, LET VALVE HF2 BE OPEN AT ALL TIMES.
5. Open valve BTR1 and close valve SPS1 before proceeding to pump startup procedure.
6. Start 20 + 44 gpm pump and keep valve HF2 open during the procedure.
7. In the software, set "V set" to 18.0 Vdc.
8. Execute Air Bleeding Method 1 but keep valve HF2 open during the procedure. Verify that valve SPS1 is open after bleeding is complete.
9. Set Return Flow to about 12 gpm by adjusting switches FC20 and/or FC44.
NOTE: The goal of the following procedure is to achieve a flow of 25 gpm with EM56-20 valve open and a
pressure of about 100-120 psig with EM56-20 valve closed, to gradually and slowly increase the
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pressure until the flow with EM56-20 valve open has reached 25 gpm.
10. Verify that valve BTR1 is open. 11. Close EM56-20 valve.
12. Carefully adjust valves BTR1 and PR in combination until Inlet Pressure is reading a maximum of 50 psig. 13. Open EM56-20 valve and note the Return Flow reading. NOTE: The goal is to gradually increase this value until
a flow of 25 gpm is achieved in this state. 14. Close EM56-20 valve. Carefully adjust valve PR to
achieve a slightly higher Inlet Pressure.
15. Carefully repeat Step 12 and 13 several times until Return Flow is reading 25 gpm with EM56-20 valve open and the Inlet Pressure is reading about 100-120 psig with EM56-20 valve closed.
NOTE: As a final result of executing Step 8-14, valve BTR1 should now be closed and valve PR almost open. If this is not achieved, change the value of the Return Flow in Step 8 and repeat Step 9-14 until the correct combination of flow and pressure is reached.
16. Open EM56-20 valve.
17. In the software, open "Graph". A graph is shown with current (A) presented on the y-axis and time (s) on the x-axis.
18. In "Graph", press "Start". Immediately cycle EM56-20 valve from open to close to open. Verify that EM56-20 valve opens and closes completely when cycling. When the valve has opened completely, immediately press "Stop".
16
19. By using "Graph", verify that running current does not exceed 2.0 amperes in either direction and starting current does not exceed 5 amperes in either direction. - Test No 4.E(4)
20. Print the graph by pressing "Print".
NOTE: In the software, remember to fill in test
information in order to get this on the printout. 21. In the software, set "V set" to 28.0 Vdc.
22. Verify that Return Flow is reading 25 gpm when 20 valve is open and that Inlet Pressure is
reading 100-120 psig when EM56-20 valve is closed. 23. Open EM56-20 valve.
24. In "Graph", press "Start". Immediately cycle EM56-20 valve from open to close to open. Verify that EM56-20 valve opens and closes completely when cycling. When the valve has opened completely, immediately press "Stop".
25. By using "Graph", verify that running current does not exceed 2.0 amperes in either direction and starting current does not exceed 5 amperes in either direction. - Test No 4.E(8)
26. Print the graph by pressing "Print". 27. In the software, set "V set" to 26.0 Vdc.
28. Verify that Return Flow is reading 25 gpm when 20 valve is open and that Inlet Pressure is
reading 100-120 psig when EM56-20 valve is closed. 29. Close EM56-20 valve.
30. In "Graph", press "Start". Immediately open EM56-20 valve. Verify that EM56-20 valve opens completely. When the valve has opened completely,
17
31. In "Graph", uncheck "Set cursor to current value". Retrieve the cursor from the very right side of the graph. Position the cursor at the end (right side) of the current cycle. Note the end value by reading "Cursor Position". Position the cursor at the
beginning (left side) of the current cycle. Note the start value by reading "Cursor Position".
32. Subtract start value from end value in order to calculate the time to fully open EM56-20 valve. 33. Verify that EM56-20 valve opens fully in 1 second or
less. - Test No 4.E(10)
34. Verify that Return Flow is reading 25 gpm when 20 valve is open and that Inlet Pressure is
reading 100-120 psig when EM56-20 valve is closed. 35. Verify that "V set" is set to 26.0 Vdc.
36. Open EM56-20 valve.
37. In "Graph", press "Start". Immediately close EM56-20 valve. Verify that EM56-20 valve closes completely. When the valve has closed completely,
immediately press "Stop".
38. In "Graph, position the cursor at the end (right side) of the current cycle. Note the end value by reading "Cursor Position". Position the cursor at the beginning (left side) of the current cycle. Note the start value by reading "Cursor Position".
39. Subtract start value from end value in order to calculate the time to fully close EM56-20 valve. 40. Verify that EM56-20 valve closes fully in 1 second or
less. - Test No 4.E(12)
41. Verify that Return Flow is reading 25 gpm when 20 valve is open and that Inlet Pressure is
18
42. In the software, set "V set" to 28.0 Vdc. 43. Close EM56-20 valve.
44. Open EM56-20 valve, while EM56-20 valve blade is in motion, reverse direction the valve. Valve blade shall reverse direction and return to the valve closed position. - Test No 4.E(15)
45. Repeat Step 43-44 one time. - Test No 4.E(16)
46. Depressurize by opening valve BTR1 and closing valve SPS1.
(f) Starting Current
This test is according to CMM 29-11-01, chapter “TESTING AND FAULT ISOLATION”, paragraph 4.F. NOTE: This test requires that both of the test bench's main pumps are shutoff.
1. Install the component according to Installation A or Installation B.
2. Connect the Test Box [3].
3. In the software, set "V set" to 28.0 Vdc.
4. In "Graph", press "Start". Cycle EM56-20 valve several times between fully closed and fully opened position. Verify that EM56-20 valve opens and closes completely when cycling. When cycling is complete, press "Stop". 5. In "Graph", uncheck "Set cursor to current value".
Retrieve the cursor from the very bottom of the graph. Position the cursor at the highest peak of the current cycles.
6. Peak starting current shall not exceed 5 amperes. - Test No 4.F
7. In "Graph”, position the cursor at the end (right side) of the starting current cycle. Note the end
19
value by reading "Cursor Position". Position the cursor at the beginning (left side) of the staring current cycle. Note the start value by reading "Cursor Position".
8. Subtract start value from end value in order to calculate the maximum period for starting current. 9. Maximum period for starting current shall not exceed
500 ms. - Test No 4.F
(g) Continuity Test
This test is according to CMM 29-11-01, chapter “TESTING AND FAULT ISOLATION”, paragraph 4.G. NOTE: This test requires that both of the test bench's main pumps are running. If the test bench is running in single pump mode, shut off pump before proceeding.
WARNING: THE PROCEDURE DESCRIBED IN CMM 29-11-01 PARAGRAPH 4G2/4G3 IS NOT ADAPTED TO TEST BENCH "BETTAN". FOLLOWING CMM'S PROCEDURE IN THIS PARAGRAPH WILL RESULT IN DAMAGE TO THE COMPONENT DUE TO EXTREMLY HIGH PRESSURE WHEN THE EM56-20 VALVE CLOSES.
1. Install the component according to Installation A. 2. Connect Connection Pipe AN-MS-16 [4] to port RTTFM.
20
3. Connect Blue HP Hose [9] between Connection Pipe AN-MS-16 [4] and component's port B (figure 6).
4. Connect Test Box [3]
CAUTION: THROUGHOUT THE FOLLOWING START PROCEDURE, LET VALVE HF2 BE OPEN AT ALL TIMES.
5. Open valve BTR1 and close valve SPS1 before proceeding to pump startup procedure.
6. Start 20 + 40 gpm pump and keep valve HF2 open during the procedure.
7. In the software, set "V set" to 23.0 Vdc.
8. Execute Air Bleeding Method 1 but keep valve HF2 open during the procedure. Verify that valve SPS1 is open after bleeding is complete.
9. Set Return Flow to about 12 gpm by adjusting switches FC20 and/or FC44.
21
NOTE: The goal of the following procedure is to achieve a flow of 25 gpm with EM56-20 valve open and a
pressure of about 100-120 psig with EM56-20 valve closed, to gradually and slowly increase the
pressure until the flow with EM56-20 valve open has reached 25 gpm.
10. Verify that valve BTR1 is open. 11. Close EM56-20 valve.
12. Carefully adjust valves BTR1 and PR in combination until Inlet Pressure is reading a maximum of 50 psig. 13. Open EM56-20 valve and note the Return Flow reading. NOTE: The goal is to gradually increase this value until
a flow of 25 gpm is achieved in this state. 14. Close EM56-20 valve. Carefully adjust valve PR to
achieve a slightly higher Inlet Pressure.
15. Carefully repeat Step 12 and 13 several times until Return Flow is reading 25 gpm with EM56-20 valve open and the Inlet Pressure is reading about 100-120 psig with EM56-20 valve closed.
NOTE: As a final result of executing Step 8-14, valve BTR1 should now be closed and valve PR almost open. If this is not achieved, change the value of the Return Flow in Step 8 and repeat Step 9-14 until the correct combination of flow and pressure is reached.
16. Open EM56-20 valve.
17. In the software, set "V set" to 23.0 Vdc.
18. Set EM56-20 to any position between open and closed (mid-position).
19. Disconnect the Test Box [3]. Connect test leads from Simpson [12] to connector pins B-D. Circuit shall be open. - Test No 4.G(4)
22
20. Connect Test Box [3]. 21. Close EM56-20 valve. 22. Disconnect Test Box [3].
23. Connect test leads from Simpson [12] to connector pins A-C. Circuit shall be open. - Test No 4.G(6) 24. Connect test leads from Simpson [12] to connector
pins B-E. Circuit shall be open. - Test No 4.G(6) 25. Connect test leads from Simpson [12] to connector
pins A-E. Circuit shall be closed. - Test No 4.G(6) 26. Connect test leads from Simpson [12] to connector
pins B-D. Circuit shall be closed. - Test No 4.G(6) 27. Connect Test Box [3].
28. Close EM56-20 valve. Verify that Inlet Pressure is reading 100 psig.
29. Starting with the EM56-20 valve in closed position, start opening the valve. Before the valve blade has reached fully open position, set the testbox's switch to neutral position. (The valve will stop in a
mid-position.)
30. Disconnect Test Box [3].
31. Connect test leads from Simpson [12] to connector pins A-C. Circuit shall be open. - Test No 4.G(9) 32. Connect Test Box [3].
33. Open EM56-20 valve. 34. Disconnect Test Box [3].
35. Connect test leads from Simpson [12] to connector pins A-E. Circuit shall be open. - Test No 4.G(11)
23
36. Connect test leads from Simpson [12] to connector pins B-D. Circuit shall be open. - Test No 4.G(11) 37. Connect test leads from Simpson [12] to connector
pins A-C. Circuit shall be closed. - Test No 4.G(11) 38. Connect test leads from Simpson [12] to connector
pins B-E. Circuit shall be closed. - Test No 4.G(11) 39. Shut off pumps.
40. Connect Test Box [3].
41. Starting with the EM56-20 valve in closed position, start opening the valve. Before the valve blade has reached fully open position, set the testbox's switch to neutral position. (The valve will stop in a
mid-position.)
42. Disconnect Test Box [3].
43. Connect test leads from Simpson [12] to connector pins A-E. Circuit shall be closed. - Test No 4.G(14) 44. Connect test leads from Simpson [12] to connector
pins B-E. Circuit shall be closed. - Test No 4.G(14) 45. Connect test leads from Simpson [12] to connector
pins A-C. Circuit shall be open. - Test No 4.G(14) 46. Connect test leads from Simpson [12] to connector
pins B-D. Circuit shall be open. - Test No 4.G(14) 47. Connect Test Box [3].
48. Starting with the EM56-20 valve in open position, start closing the valve. Before the valve blade has reached fully closed position, set the testbox's switch to neutral position. (The valve will stop in a mid-position.)
24
50. Connect test leads from Simpson [12] to connector pins A-E. Circuit shall be closed. - Test No 4.G(17) 51. Connect test leads from Simpson [12] to connector
pins B-E. Circuit shall be closed. - Test No 4.G(17) 52. Connect test leads from Simpson [12] to connector
pins A-C. Circuit shall be open. - Test No 4.G(17) 53. Connect test leads from Simpson [12] to connector
pins B-D. Circuit shall be open. - Test No 4.G(17) 54. Disconnect Test Box [3].
(h) Bonding Resistance Test
This test is according to CMM 29-11-01, chapter “TESTING AND FAULT ISOLATION”, paragraph 4.H.
NOTE: This test requires that the component is disconnected from any hydraulic or electrical connections.
1. Install the component between protection plates. 2. Setup Resistomat [11] as following:
• Temp. Kompensation: "Ein" / "On"
• Range: "20 mohm" / "1A"
• Netz POWER: "ON"
3. Connect the test clips to the Resistomat [11] as following:
• Grey cables: "-I", "-U"
• Red cables: "+I", "+U"
4. Connect the grey test clip to bonding test point 1 (figure 7).
5. Connect the red test clip to bonding test point 2 (figure 7).
25
6. Verify that electrical resistance does not exceed 0.0025 ohm. - Test No 4.H
7. Connect the red test clip to bonding test point 3. 8. Verify that electrical resistance does not exceed
0.0025 ohm. - Test No 4.H
(i) Post Test
This test is according to CMM 29-11-01, chapter “TESTING AND FAULT ISOLATION”, paragraph 4.I.
1.
Flush unit.
2.
Fill unit with BMS 3-11 so that internal
seals are lubricated.
NOTE: Sufficient air entrapment must be
present for storage thermal expansion.
3.
Using BMS 3-11 or equivalent resistant
plastic cap, cap ports and electrical
connections.
- Test No 4.I26
Maintenance Work Sheet Fuse 2-7737
for
TABLE OF CONTENTS
1.
Test Description
... 1
2.
Equipment Needed For Testing
... 1
A. General ... 1 B. Equipment ... 1
3.
Test Conditions
... 1
4.
General Procedures Regarding Testing
... 1
A. General ... 1 B. Repetitive Procedures ... 2 General Test Setup A & B ... 2 (a) Fuse Reset ... 3 (b)
5.
Test Procedure
... 3
A. General ... 3 B. Testing ... 3 Proof Pressure Test ... 3 (a)Minimum Flow Test ... 4 (b)
Internal Leakage Test ... 5 (c)
Reverse Flow Test ... 6 (d)
Pressure Drop Test ... 6 (e)
Volumetric Capacity Test ... 7 (f)
Reset Test ... 9 (g)
Bypass Test ... 11 (h)
1
1. Test DescriptionThis is a description of the test procedure for the Fuse 2-7737 for performing the tests in test bench "Bettan".
The following description refers to CMM 32-40-15, chapter
“TESTING/TROUBLESHOTTING”. CMM 32-40-15 shall always be used along with this test sheet.
2. Equipment Needed For Testing A. General
According to "Test Equipment" in CMM 32-40-15 the tests require more equipment than the following specified list. Equipment not mentioned is built in test bench.
B. Equipment
Nr Name Serial Quantity
Required
Notes
1 Valve M Standard item 1 2 Blue High Pressure Hose (HP
Hose)
Standard item 3 3 T-pipe Standard item 2
4 AN-MS-8 Standard item 1 90-dgr
Connection Pipe 5 Pipe Standard item 2 Straight
Connection Pipe 6 Push-Pull Gage 642-411-0116 1 Chatillon DFM 50
3. Test Conditions
According to “Test Conditions” in CMM 32-40-15 chapter “TESTING/TROUBLESHOOTING”.
4. General Procedures Regarding Testing A. General
In this paragraph there are descriptions of standard (a)
setups and procedures required to perform the
testing. The testing is based upon knowledge of the following procedures and therefore the test
instructions are referring to this paragraph at several occasions.
2
If desirable/necessary, test bench shutoff procedure (b)
can be executed after each subtest. The instructions regarding all subtests assume that test bench is shutoff when the subtests begin.
B. Repetitive Procedures
General Test Setup A & B
(a)
By using equipment Nr [1], [2], [3], [4], [5], install the component according to figure 1.
The component shall be oriented so that the bypass lever is closest to the return side of the
installation.
The three HP Hoses [2] shall be connected to the following ports:
• Setup A (High flow): Valve M to port RTTFM Setup B (Low flow) : Valve M to port A1
• Port PP13 – Pressure after component
• Port PP14 - Pressure before component
3
Fuse Reset(b)
The fuse is a volume triggered shutoff valve. During the testing the fuse will close at several occasions and needs to be reset (opened).
1. Position Shifter to SP3, this will cut the flow to the fuse and will allow it to reset.
2. Hold for about 3 seconds. The fuse has now reset.
5. Test Procedure A. General
All tests in this paragraph are adapted to test bench (a)
“Bettan” and produced with CMM 32-40-15 as reference. The reference document, CMM 32-40-15, shall under all circumstances be used along with all test procedures following.
In this paragraph there are several grey marked “Test (b)
No”. This is a direct reference to CMM 32-40-15. The “Test No” shall also be used along with the test paragraphs of MWS32-40-15.
B. Testing
NOTE: During all of the following subtests, valve HF2 shall be open at all times.
Proof Pressure Test
(a)
This test is according to CMM 32-40-15, chapter “TESTING/TROUBLESHOOTING”, section 4.B(1).
1. Install the component according to General Test Setup A.
2. Open valve BTR1 and valve HF2 before proceeding to pump startup procedure.
3. Start 20 gpm pump.
4. Position Shifter to SP4. 5. Slowly close valve M.
4
6. Close valve BTR1 until Pressure Bp229 is reading 3000 psi.
7. Increase pressure with PR until Pressure Bp229 is reading 4500 psi.
8. Hold for 2 minutes.
9. Decrease pressure with PR until Pressure Bp229 is reading 3000 psi.
10. Depressurize by opening valve BTR1.
11. There shall be no evidence of external leakage failure, distortion or permanent set. - Test No
4.B(1) (a) to (f) Minimum Flow Test
(b)
This test is according to CMM 32-40-15, chapter “TESTING/TROUBLESHOOTING”, section 4.B(2).
1. Install the component according to General Test Setup B.
2. Open valve BTR1 and valve LFG before proceeding to pump startup procedure.
3. Start 20 gpm pump.
4. Position Shifter to SP4. 5. Open valve M.
6. Gradually and in interaction, adjust valve BTR1 and valve M until Pressure Bp229 is reading 3000 psi and until Return flow BQ222 (mL/min) is reading a value between .189 and .208 lpm.
7. Reset the fuse and position Shifter to SP4, maintain the flow from Step 6 for 8.3 minutes. 8. Fluid flow shall not stop during this test. - Test
No 4.B(2) (a) to (i)
5
Internal Leakage Test(c)
This test is according to CMM 32-40-15, chapter “TESTING/TROUBLESHOOTING”, section 4.B(3).
1. Install the component according to General Test Setup B.
2. Close valve M.
3. Open valve BTR1 and valve LFG before proceeding to pump startup procedure.
4. Start 20 gpm pump.
5. Position Shifter to SP4.
6. Close valve BTR1 until Pressure Bp229 is reading 3000 psi.
7. Gradually open valve M until unit fuses. (Flowmeter BQ222 shall now read zero.) When unit has fused, start a countdown timer for 3 minutes. Execute Step 8 within 2 minutes.
8. After flow has stopped, disconnect HP Hose [2] from the T-connection that is connected to port PP13. 9. Leakage measurement shall be conducted during the
last minute and shall not exceed 5 drops per minute. (The leakage shall be measured from the open port on the T-pipe.) - Test No 4.B(3) (a) to
(h) Step (d)
10. Open valve BTR1 until Pressure Bp229 is reading 37-43 psi.
11. Fuse shall remain fused.
12. Maintain the 37-43 psi pressure for 3 minutes. 13. Requirement: Leakage measurement shall not exceed
10 drops per minute. - Test No 4.B(3) (a) to (h)
Step (g)
14. Depressurize by opening valve BTR1. 15. Reconnect HP Hose [2] to T-pipe.
6
Reverse Flow Test(d)
This test is according to CMM 32-40-15, chapter “TESTING/TROUBLESHOOTING”, section 4.B(4).
1. Install the component according to General Test Setup B but install the unit in reversed direction. 2. Open valve M.
3. Open valve BTR1 and valve LFG before proceeding to pump startup procedure.
4. Start 20 gpm pump.
5. Position Shifter to SP4. 6. Close valve M.
7. Adjust valve BTR1 until Pressure Bp229 is reading 30-50 psi (206.8-345 kPa).
8. Open valve M to allow fluid flow through the fuse. Requirement: Fluid shall flow through the fuse.
Verify by reading Return flow BQ222. - Test No 4.B(4) (a) to (c)
9. Depressurize by opening valve BTR1.
Pressure Drop Test
(e)
This test is according to CMM 32-40-15, chapter “TESTING/TROUBLESHOOTING”, section 4.B(5).
NOTE: If the unit fuses before the correct flow is obtained, reset the fuse and continue to adjust valve M until the correct flow is set.
1. Install the component according to General Test Setup B.
2. Close valve M.
3. Open valve BTR1 and valve LFG before proceeding to pump startup procedure.
7
5. Position Shifter to SP4.
6. Close valve BTR1 until Pressure Bp229 is reading 3000 psi.
7. Open valve M until Return flow BQ220 is reading 6.0/6.2 gpm (22.7/23.5 lpm).
NOTE: Due to the fast fusing of the unit at this high flow rate, it is necessary to reset the fuse at several times and use the graph function in the software in order to set the correct flow. Select profile “Flow 32-40-15”.
8. In the software, select profile ”Pressuredrop 32-40-15” in ”Graph”-window. This graph will record pressure before and after the component:
• Pressure before – Red curve (Bp229)
• Pressure after – Yellow curve (Bp230) 9. Reset the fuse and position Shifter to SP4. 10. Immediately measure and record pressure drop
through the fuse by reading the graph.
Requirement: Pressure drop shall not exceed 100 psid (689 kPa). - Test No 4.B(5) (a)
to (i)
NOTE: If the pressure drop exceeds 100 psid (389 kPa), perform Step 1-10 without component installed. Record this pressure drop and subtract from the obtained value with
component installed. If the pressure drop now is less than 100 psid (389 kPa), the
component has passed the subtest. 11. Depressurize by opening valve BTR1.
Volumetric Capacity Test
(f)
This test is according to CMM 32-40-15, chapter “TESTING/TROUBLESHOOTING”, section 4.B(6).
NOTE: If the unit fuses before the correct flow is obtained, reset the fuse and continue to adjust
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valve M until the correct flow is set. If the unit fuses quickly, the graph function in the software can be used to determine if the correct flow is set. Select profile “Flow 32-40-15”.
NOTE: When the unit has fused, the pressure
difference between Pressure Bp229 and Pressure Bp230 will increase. This method can be used in order to determine when the unit fuses.
1. Install the component according to General Test Setup B.
2. Open valve M.
3. Open valve BTR1 and valve LFG before proceeding to pump startup procedure.
4. Start 20 gpm pump.
5. Position Shifter to SP4. 6. Close valve M.
7. Close valve BTR1 and adjust pressure with valve PR until Pressure Bp229 is reading 3000 psi.
8. Open valve M until Return flow BQ222 is reading .1 gpm (.378 lpm).
9. Reset the fuse when Step 8 is complete.
10. Position Shifter to SP4 then, in the software, immediately press to start Flow totalizer.
11. After the unit has fused, determine the volume of fluid that has passed through the unit by reading the Flow totalizer.
Requirement: This value shall be between 42-80 in3 (688.3-1311 cc). - Test No 4.B(6) (a)
to (p)
12. Reset the fuse then position Shifter to SP4. 13. Open valve M until Return flow BQ222 is reading 2
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14. Reset the fuse when Step 13 is complete
15. Position Shifter to SP4 then, in the software, immediately press to start Flow totalizer.
16. After the unit has fused, determine the volume of fluid that has passed through the unit by reading the Flow totalizer.
Requirement: This value shall be between 42-80 in3 (688.3-1311 cc). - Test No 4.B(6) (a)
to (p)
17. Reset the fuse then position Shifter to SP4. 18. Open valve M until Return flow BQ222 is reading 8
gpm (30.3 lmp).
NOTE: Due to the fast fusing of the unit at this high flow rate, it is now necessary to reset the fuse at several times and use the graph function in the software in order to set the correct flow. Select profile “Flow 32-40-15”. 19. Reset the fuse when Step 18 is complete.
20. Position Shifter to SP4 then, in the software, immediately press to start Flow totalizer.
21. After the unit has fused, determine the volume of fluid that has passed through the unit by reading the Flow totalizer.
Requirement: This value shall be between 42-80 in3 (688.3-1311 cc). - Test No 4.B(6) (a)
to (p)
22. Depressurize by opening valve BTR1.
Reset Test
(g)
This test is according to CMM 32-40-15, chapter “TESTING/TROUBLESHOOTING”, section 4.B(7).
NOTE: If the unit fuses before the correct flow is obtained, reset the fuse and continue to adjust valve M until the correct flow is set.
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NOTE: When the unit has fused, the pressure
difference between Pressure Bp229 and Pressure Bp230 will increase. This method can be used in order to determine when the unit fuses.
1. Install the component according to General Test Setup A.
2. Open valve M.
3. Open valve BTR1 and valve HF2 before proceeding to pump startup procedure.
4. Start 20 gpm pump.
5. Position Shifter to SP4. 6. Close valve M.
7. Close valve BTR1 and adjust pressure with valve PR until Pressure Bp229 is reading 3000 psi.
8. Open valve M until Return flow BQ220 is reading 6 gpm (22.7 lpm).
NOTE: Due to the fast fusing of the unit at this high flow rate, it is necessary to reset the fuse at several times and use the graph function in the software in order to set the correct flow. Select profile “Flow 32-40-15”. 9. Reset the fuse and position Shifter to SP4. The
unit shall fuse, Return flow BQ220 shall now read zero.
10. After the fluid flow has stopped, depressurize by positioning Shifter to SP3. Hold for 4.8-5.0 seconds.
Requirement: Unit shall reset.
11. Position Shifter SP4 to allow forward flow through the fuse. Verify that unit has reset by reading Return flow BQ220.
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13. Position Shifter to SP4 to reapply pressure. In the software, immediately press to start Flow
totalizer.
14. After the unit has fused, determine the volume of fluid that has passed through the unit by reading the Flow totalizer. Record as volume “B”. Reset Flow totalizer. - Test No 4.B(7) (a) to (f) 15. Instantly, reset the fuse.
16. Position Shifter to SP4 to reapply pressure. In the software, immediately press to start Flow
totalizer.
17. After the unit has fused, determine the volume of fluid that has passed through the unit by reading the Flow totalizer. Record as volume “C”. - Test No
4.B(7) (a) to (f)
18. Both fused volumes (B and C) shall be within 10 cubic inches (164 cc) of each other and each fused volume shall be within 42-80 cubic inches (688.3-1311 cc). - Test No 4.B(7) (a) to (f)
19. Depressurize by opening valve BTR1.
Bypass Test
(h)
This test is according to CMM 32-40-15, chapter “TESTING/TROUBLESHOOTING”, section 4.B(8).
1. Install the component according to General Test Setup A.
2. Open valve M.
3. Open valve BTR1 and valve HF2 before proceeding to pump startup procedure.
4. Start 20 gpm pump.
5. Position Shifter to SP4. 6. Close valve M.
7. Close valve BTR1 and adjust pressure with valve PR until Pressure Bp229 is reading 3000 psi.
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8. Open valve M, allow flow until unit fuses. 9. Using Push-Pull Gage [6], manually open bypass
lever to the full open position.
Requirement: The bypass lever actuation lever force shall not exceed 20 lb (9.07 kg). - Test No 4.B(8) (a) to (h) Step (e) 10. While holding bypass lever open, gradually close
valve M until Return flow BQ220 is reading 3.0 gpm (11.4 lpm).
Requirement: When Return flow BQ220 is reading 3.0 gpm (11.4 lpm), pressure between Pressure Bp229 and Pressure Bp230 shall not exceed 700 psid (4826 kPa). - Test No 4.B(8) (a) to (h) Step (f) 11. Release the bypass lever and verify that it is
spring loaded to the full closed position as evidenced by a minimum of 2900 psid (19.995 kPa) across the fuse.
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Maintenance Work Sheet Yaw Damper Servo
for
TABLE OF CONTENTS
1. Test Description ... 1 2. Equipment Needed For Testing ... 1 A. General ... 1 B. Equipment ... 1 3. Test Conditions ... 2 4. General Procedures Regarding Testing ... 2 A. General ... 2 B. Repetitive Procedures ... 2 (a) General Test Setup ... 2 (b) Air Bleeding Method 1 ... 4 5. Test Procedure ... 6 A. General ... 6 B. Electrical Tests ... 6 (a) Electrical Wiring Continuity and Resistance Test ... 6 (b) Dielectric Strength Test ... 7 (c) Insulation Resistance Test ... 8 (d) Bonding Resistance Test ... 9 (e) LVDT Null Adjustment ... 10 (f) LVDT Output Voltage Test ... 12 (g) Electro-Hydraulic Servo Valve (EHSV) Polarity Test ... 13 (h) LVDT Phase Test ... 14 (i) Free Play Test ... 14 C. Hydraulic Tests ... 16 (a) Proof Pressure Test ... 16 (b) Leakage Test ... 17 (c) Output Stroke Test ... 17 (d) Resolution Test ... 17 (e) Centering Test ... 17 (f) Centering Force Test ... 17 (g) Null Bias Test ... 18