Mercury MerCruiser D2.8L D-Tronic Service Manual page 143

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