TROUBLESHOOTING
SERVICE MANUAL NUMBER 22
90-860074--1 FEBRUARY 2002 Page 1C-37
ZF / Hurth Hydraulic Transmission (continued)
Trouble Possible Cause Remedy
8. Excessive fluid
temperature
8. A. Excessive fluid in
transmission
8. A. Remove excessive
fluid with commercial fluid
pump
B. Fluid cooler is dirty on
water side
B. Remove coolant lines
and clean fluid cooler on
water side
C. Worn fluid pump in
control block
C. Replace control block
and fluid pump
D. Faulty piston rings in
input shaft in control block
D. Remove control block,
replace piston rings in
input shaft. Check control
block and replace if
damaged from faulty
piston rings
E. Clutch is slipping E. Refer to Number 3
F. Clutch does not open
completely due to worn
clutch discs
F. Dismount
transmission, replace
inner disc all faulty parts
G. Clutch does not open
completely due to broken
clutch cup springs
G. Disassemble
transmission, replace
inner disc support and/or
clutch
H. Low water flow from
seawater pump
H. Repair or replace
seawater pump
9. Water in fluid, fluid
looks milky
9. A. Fluid cooler faulty 9. A. Repair leakage at
cooler or replace cooler
and replace cooler
B. High water level in
engine compartment,
water entering at output
shaft seal
B, Remedy cause for
water level in engine
compartment, change
transmission fluid
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