Mercury 75 Service Manual page 385

Hydraulic System Troubleshooting Flow Chart
Manual release
valve and O-ring
damaged
Replace manual re-
lease valve and O-
rings
Trim system does
not leak down:
Testing complete
Debris and/or dam-
age identified
Replace tilt relief valving
Trim system does
not leak
Testing complete
Replace PO check
valve assembly
Trim system does
not leak down:
Testing complete
90-830234R3 DECEMBER 1997
TRIM SYSTEM LEAKS DOWN WITH
MANUAL RELEASE VALVE CLOSED
Inspect manual release valve
Trim system
down
Remove tilt relief valving
and inspect O-rings and
seals for debris and/or
damage
Trim
down
Remove PO check valve
down: assembly,
rings and seals for dam-
age
Debris and/or dam-
age identified
Trim
down
continued on next page
Manual release valve and O-
rings appear to be O.K. - Clean
and reinstall manual release
valve
leaks
Tilt relief valving and O-rings
appear to be O.K. - Clean and
reinstall tilt relief valving
system leaks
inspect O-
PO check valve appears
O.K. - Clean and reinstall
PO check valve assembly
system leaks
Trim system does
not leak down:
Testing complete
Trim system does
not leak down:
Testing complete
Trim system does
not leak down:
Testing complete
MID-SECTION - 5C-25