SM02-025-0
Page 15
1.
Check oil level in transmission. This should be
d. Hold converter stalled until desired temper-
done with oil temperature at 1 80 to 200 degrees F
ature is reached.
(82.2 to 93.3 degrees C). Do not attempt these checks
with cold oil.
CAUTION
Full throttle stall speeds for an excessive
2.
To bring the oil temperature to this level, it is
necessary to either work the machine or stall out the
length of time will overheat the torque
converter. When it is impractical to work the ma-
converter.
chine, stall out the converter as follows:
NOTE
a.
Apply the parking brakes.
Always make all troubleshooting checks
b.
Position the shift lever to forward and high
with the converter outlet temperature at
speed.
least 180 to 200 degrees F (82.3 to 93.3
degrees C).
c. Accelerate engine to between half and
three quarter throttle.
Procedure.
SYMPTOM
PROBABLE CAUSE
SOLUTION
1.
Low clutch pressure
a.
Low oil level.
a.
Fill to proper level.
b. Clutch pressure regulating valve
b.
Clean valve spool and housing.
spool stuck open.
c.
Faulty charging pump.
c.
Replace pump.
d. Broken or worn clutch shaft or
d.
Replace sealing rings.
piston sealing rings.
e. Clutch piston bleed valve stuck
e.
Clean bleed valves thoroughly
open.
2.
Low converter charging pump
a.
Low oil level.
a.
Fill to proper level.
output.
b.
Suction screen plugged.
b.
Clean suction screen.
c. Tighten all connections or re-
c. Air leaks at pump intake hose
and connections or collapsed hose.
place hose if necessary.
d.
Defective oil pump.
d.
Replace pump.
3.
Overheating.
a.
Worn oil sealing rings.
a. Remove, diassemble, and re-
build converter assembly.
b.
Worn oil pump.
b.
Replace.
c.
Low oil level.
c.
Fill to proper level.
d.
Pump suction line taking air.
d. Check oil line connections and
tighten.
