Mercury 40 Service Manual page 387

Hydraulic System Troubleshooting Flow Chart
Manual release valve
and O-ring damaged.
Replace manual re-
lease valve
O-rings.
Trim system does
not leak down. Test-
ing complete.
Debris and/or dam-
age identified.
Replace tilt relief valving.
Trim system does
not leak down. Test-
ing complete.
Replace PO check
valve assembly.
Trim system does
not leak down. Test-
ing complete.
90-828631R3 MARCH 1999
TRIM SYSTEM LEAKS DOWN
WITH MANUAL RELEASE VALVE
CLOSED.
Inspect manual release valve.
Trim system
down.
and
Remove tilt relief valving
and inspect O-rings and
seals for debris and/or
damage.
Trim
down.
Remove PO check valve
assembly,
rings and seals for dam-
age.
Debris and/or dam-
age identified.
Trim system leaks 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 assem-
bly.
POWER TRIM
Trim system does
not leak down. Test-
ing complete.
Trim system does
not leak down. Test-
ing complete.
Trim system does
not leak down.
Testing complete.
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