Disassembling The Water Pump; Checking The Water Pump - Yamaha MT-03 Service Manual

EAS00470

DISASSEMBLING THE WATER PUMP

1. Remove:
• Water pump seal "1"
NOTE:
Tap out the water pump seal from water pump
housing in the direction of the arrow shown.
2. Water pump housing
2. Remove:
• Bearing "1"
• Oil seal "2"
NOTE:
Tap out the bearing and oil seal from water
pump housing in the direction of the arrow
shown.
3. Water pump housing
3. Remove:
• Rubber damper holder "1"
• Rubber damper "2" (from the impeller, with a
thin, flat-head screwdriver)
NOTE:
Do not scratch the impeller shaft.
EAS00474

CHECKING THE WATER PUMP

1. Check:
• Water pump housing cover "1"
• Water pump housing "2"
• Impeller "3"
• Rubber damper "4"
• Rubber damper holder "5"
Cracks/damage/wear
2
2. Check:
• Water pump seal
• Oil seal
Cracks/damage/wear
3. Check:
• Bearing
Rough movement
4. Check:
• Impeller shaft gear
Pitting/wear
5. Check:
• Water pump outlet pipe
• Radiator outlet hose
• Water jacket inlet housing
Cracks/damage/wear
6-9
WATER PUMP
Replace.
1
5
4
Replace.
Replace.
Replace.
Replace.
3