Hydraulic System Troubleshooting - Mercury 75 Service Manual

Hydraulic System
Troubleshooting
Refer to disassembly/reassembly instructions (fol-
lowing) if disassembly is required when servicing.
IMPORTANT: After debris or failed components
have been found (during troubleshooting proce-
dure) it is recommended that unit be disas-
sembled completely and ALL O-rings be re-
placed. Check ball components and castings
must be cleaned using engine cleaner and com-
pressed air or replaced prior to reassembly.
Support outboard with tilt lock lever when servicing
manual tilt system.
1. Check manual release cam adjustment. Cam
must open and close freely. Adjust cam link rod
as necessary.
a
c
a - Link Rod
b - Manual Release Lever
c - Accumulator
2. Check for external leaks in the manual tilt system.
Replace defective part(s) if leak is found.
IMPORTANT: If cut or damaged O-rings are
found, inspect machined surfaces for scoring,
burrs or debris.
5E-16 - MID-SECTION
3. Check for discharged accumulator. 35 to 50 lb. ft.
(47-68 N·m) of pulling force must be attained
when tilting outboard from full "down" to full "up"
position. If more than 50 lb. ft. (68 N·m) of force
is required, replace accumulator.
b
a - Weight Scale
b - Valve Lever (open position)
51143
a
b
90-830234R3 DECEMBER 1997
50431