Checking The Gear Pump; Assembling The Gear Pump Housing - Yamaha F150A Service Manual

BRKT
5. Remove the main valves.
WARNING
Never look into the pump housing open-
ing while removing the main valves
because the main valves and power trim
and tilt fluid can be forcefully expelled
out.
NOTE:
To remove the main valves, cover the pump
housing with a clean cloth, and then blow
compressed air through holes a and b
while holding the cloth down.
6. Remove the manual valve.
7-35
Bracket unit
a
b
S60X7450
S60X7460

Checking the gear pump

1. Clean all the valves, pistons, and balls,
and then check them for damage or
wear. Check the filters for damage or
clogs. Replace if necessary.
2. Check the drive gears for damage or
wear. Replace the gear pump assembly
if necessary.

Assembling the gear pump housing

CAUTION:
Install the components and parts in their
original direction and positions.
1. Install a new O-ring 1, the up-relief valve
seat 2, ball 3, absorber valve pin 4,
and spring 5 into the gear pump hous-
ing.
S63P7010
63P3F11