Test (Cont) - TM-9-2350-238-20-10780

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

point to be pressure-tested (see fig. 2-1).

Install pressure gage tester and start

engine.

Reduce engine speed to idle. Shift

transmission to desired range (see

Slowly increase engine speed to desired

rpm (see fig. 2-2). Record readings for

each test point.

If transmission readings are not within

normal range (see fig. 2-2), notify direct

support maintenance.

2-754