TM 5-3805-262-20
3-30. ENGINE TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6. ENGINE STALLS FREQUENTLY OR DOES NOT DEVELOP FULL POWER (Cont) .
S t e p 9 . ( C o n t ) .
Start engine and operate at idle speed.
Press and hold down brake treadle valve pedal for remainder of test.
Place transmission control lever in H position.
P r e s s a c c e l e r a t o r p e d a l f u l l y.
Hold BUCKET control lever in CROWD position.
Watch VTM display.
Tell assistant to watch thermometer of temperature probe installed
in transmission elbow.
When transmission temperature reaches 200 degrees F, record engine
speed as indicated by VTM display.
Engine speed should be 1430 rpm minimum.
Release accelerator pedal , move BUCKET control lever to NEUT.
t i o n,
and place transmission control lever in N position.
Allow engine to operate at idle speed for 3 minutes then turn
engine.
p o s i-
Off
a. If engine speed is 1430 rpm minimum, engine, torque converter
and transmission, and hydraulic system are probably okay. Go to
step 11 below.
b. If engine speed is not 1430 rpm minimum, go to step 10 below.
engine and operate at idle speed.
transmission control lever in H position.
and hold down brake treadle and valve pedal for remainder of
a c c e l e r a t o r p e d a l f u l l y.
VTM display.
Step 10. Start
Place
Press
t e s t .
Press
Watch
Tell assistant to watch thermometer of temperature probe installed
in transmission elbow.
When transmission temperature reaches 200 degrees F, record engine
speed as indicated by VTM display.
Engine speed should be 2000 to 2100 rpm using number 2 Diesel fuel
and 1900 to 2000 rpm using number 1 Diesel fuel.
Release accelerator pedal and place transmission control lever in N
p o s i t i o n.
Allow engine to operate at idle speed for 3 minutes then turn off
engine.
a. If engine speed is 2000 to 2100 rpm using number 2 Diesel fuel
or 1900 to 2000 rpm using number 1 Diesel fuel, engine and tor-
que converter and transmission are probably okay. Problem is in
hydraulic system; notify next higher maintenance level to per-
form flowmeter checks to locate problem.
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