NMC-WOLLARD MB-4 200-DF - Clutch Pressure Does Not Return; In All Clutches; Excessive Noise

Test and Troubleshooting
100
14
DPSG,YZ07927,99 –19–22JUN99–1/1
CLUTCH PRESSURE DOES NOT RETURN
IN ALL CLUTCHES
Symptom Problem
Solution
Clutch selected pressure does Contaminated solenoid valve spool. Clean valve and replace oil and
not return to normal. filter.
Accumulator spring defective. Replace spring.
Primary pump defective. Replace primary pump.
DPSG,YZ07927,100 –19–22JUN99–1/1
EXCESSIVE NOISE
Symptom Problem
Solution
Excessive Noise Charge pump defective Replace pump.
Excessive backlash in gear train. Replace bearings and inspect for
defective gears.
Auxiliary driven pump bad. Remove pump and check for noise.
Internal problem Check for contamination in the oil.
CTM195 (28JUL99) 100-14 2000 Series Transmission
072899
PN=52