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TM 9-2350-238-20-1
2-127. MAINTENANCE OF TRANSMISSION AND TRANSMISSION PLUGS (CONT).
TEST (CONT)
Transmission contains hot oil under high pressure. Stop engine before removing or
installing pipe plugs or pressure gage tester in pressure test points. Install pipe plug
as soon as pressure gage tester is removed. Remove only pipe plug at test point.
NOTE
Steps 14 thru 17 apply to all transmission test points except as noted.
When making steer clutch pressure tests, move steering bar slowly from horizontal
to full steer in desired direction while watching pressure gage tester. Note pressure
rise to maximum as steering bar moves to full steer.
When making lockup engagement tests, increase engine speed slowly until lockup
apply pressure is indicated on pressure gage. Record pressure and engine speed.
Record governor pressure at lockup engagement.
When making lockup release tests, first increase engine speed higher than lockup
engagement speed, then slowly reduce engine speed while watching pressure gage
tester. When pressure drops quickly, record governor pressure and engine speed.
Stop engine. Remove pipe plug from test
14
point to be pressure-tested (see fig. 2-1).
Install pressure gage tester and start
15
engine.
Reduce engine speed to idle. Shift
16
transmission to desired range (see
17
Slowly increase engine speed to desired
rpm (see fig. 2-2). Record readings for
each test point.
18
If transmission readings are not within
normal range (see fig. 2-2), notify direct
support maintenance.
2-754

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