Checking The Gear Pump; Checking The Gear Pump Housing; Checking The Filter; Checking The Valve Seal - Yamaha F30B 2018 Service Manual

Checking the gear pump

1. Check:
• Gear pump shaft
It does not rotate smoothly  Replace the
gear pump assembly.

Checking the gear pump housing

1. Check:
• Gear pump housing
Corrosion/cracks  Replace the gear
pump assembly.

Checking the filter

1. Check:
• Down-relief valve filter
Dirt/residue  Clean.
Clogged/damaged  Replace.

Checking the valve seal

1. Check:
• Main valve
• Shuttle piston
• Absorber valve pin
• Relief valve
• Valve seal
• Valve pin
• Manual valve
• Manual valve seat
• Spring
Damage/wear  Replace.
9-40
PTT gear pump