Mercury 40 FourStroke - Page 346

POWER TRIM
90-857046R1 NOVEMBER 2001 Page 5B-25
Hydraulic System Troubleshooting Flow Chart
TRIM SYSTEM LEAKS DOWN
WITH MANUAL RELEASE VALVE
CLOSED.
Inspect manual release valve.
Manual release valve
and O-ring damaged.
Replace manual re-
lease valve and
O-rings.
Trim system does
not leak down. Test-
ing complete.
Trim system leaks
down.
Manual release valve and O-
rings appear to be O.K. - Clean
and reinstall manual release
valve.
Trim system does
not leak down. Test-
ing complete.
Remove tilt relief valving
and inspect O-rings and
seals for debris and/or
damage.
Debris and/or dam-
age identified.
Replace tilt relief valve-
ing.
Trim system does
not leak down. Test-
ing complete.
Trim system leaks
down.
Tilt relief valving and O-rings
appear to be O.K. - Clean and
reinstall tilt relief valveing.
Trim system does
not leak down. Test-
ing complete.
Remove PO check valve
assembly, inspect O-
rings and seals for dam-
age.
Debris and/or dam-
age identified.
Replace PO check
valve assembly.
PO check valve appears
O.K. - Clean and reinstall
PO check valve assem-
bly.
continued on next page
Trim system leaks down.
Trim system does
not leak down.
Testing complete.
Trim system does
not leak down. Test-
ing complete.