Mercury MerCruiser D2.8L D-Tronic Service Manual page 141

SERVICE MANUAL NUMBER 22
ZF / Hurth Hydraulic Transmission (continued)
4. Transmission is
5. Output shaft turns
6. Shifting pressure
90-860074--1 FEBRUARY 2002
Trouble
4. A. Medium piston ring in
blocked
5. A. Rotary slide valve in
in neutral position
6. A. Fluid filter dirty
too low
Possible Cause
input shaft in control block
is faulty
control block is worn
B. Faulty needle bearing
on input shaft
C. Dished discs due to
over-heating of slipping
clutch
B. Fluid level in
transmission is too low
C. Fluid pump is worn out
D. Piston rings in input
shaft in control block are
faulty
E. Piston rings in clutch
are faulty
TROUBLESHOOTING
Remedy
4. A. Remove control block,
replace piston ring,
replace control block if
worn
5. A. Replace control block
B. Disassemble
transmission and input
shaft, replace bearing
C. Refer to Number 3
6. A. Replace fluid filter
B. Fill with fluid; check for
fluid loss
transmission,cooler and
pipelines lines for leaks
also refer to steps Number
10 to Number 13
C. Replace control block
together with fluid pump
D. Remove control block
and replace piston rings.
also replace control block
E. Disassemble
transmission, replace
clutch
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