TOHATSU 40 Service Manual page 327

SECTION 8
Service Check 2 - Pump Coupling
1. Remove motor.
2. Inspect pump coupling for wear, damage, or separation from the
geared pump.
Service Check 3 - Filters
1. Remove motor.
2. Remove and clean filter B.
3. Remove and clean manifold filter (new style PT/T).
4. Inspect filters for damage or obstruction.
Service Check 4 - Relief Valve UP
1. Remove reservoir tank (old style PT/T).
2. Remove and clean relief valve UP.
3. Inspect for the following as applicable:
• Damage to valve seat.
• Smooth operation; push ball manually and check its return.
• Wear or damage to valve ball.
• Fatigue or deformation of spring.
• Damage or deterioration of o-ring.
• Dirty filter.
Service Check 5 - Relief Valve DOWN
1. Remove pump or reservoir tank (old style PT/T).
2. Remove and clean relief valve DOWN.
3. Inspect for the following as applicable:
• Damage to valve seat.
• Smooth operation; push ball manually and check its return.
• Wear or damage to valve ball.
• Fatigue or deformation of spring.
• Damage or deterioration of o-ring.
• Dirty filter.
8-28
3-/ 4-Cylinder