TROUBLESHOOTING SERVICE MANUAL NUMBER 22
Page 1C-34 90-860074--1 FEBRUARY 2002
ZF / Hurth Hydraulic Transmission
Trouble Possible Cause Remedy
1. Transmission
gears cannot be
shifted
1. A. Shifting lever loose 1. A. Tighten clamping
screw on shifting lever
B. Remote control does
not permit lever travel
required for testing
B. Lift remote control off, if
gears can be shifted by
hand, correct remote
control
C. Remote control faulty C. Repair remote control
D. No shifting pressure
available
D. Refer to Number 7
2. Gears are shifted
sluggishly
2. Lever travel of remote
control is too short; lever
shift just short of minimum
traveling distance
2. Lift remote control off, if
gears can be shifted by
hand, correct remote
control
3. Clutch is slipping;
propeller speed
too low as
compared to
engine speed
3. A. Incorrect fluid used 3. A. Drain and refill with
correct fluid, flush
transmission while engine
runs in neutral position,
drain fluid, refill
transmission
B. Fluid contains water B. Refer to Number 9
C. Shifting pressure too
low
C. Refer to Number 6
D. Wear on clutch discs D. Disassemble
transmission replace
clutch discs
E. Piston rings in clutch
are damaged
E. Disassemble
transmission replace
clutch
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