Yamaha WR450F, Owner'S Service Manual

Page: 442 / 794

4 - 61
ENG
OIL FILTER, WATER PUMP AND CRANKCASE COVER
(RIGHT)
REMOVAL POINTS
EC4G3110
Impeller shaft
1. Remove:
• Impeller
1
• Plain washer
2
• Impeller shaft
3
NOTE:
Hold the impeller shaft on its width across the
flats
a
with spanners, etc. and remove the
impeller.
EC4G3210
Oil seal
NOTE:
It is not necessary to disassemble the water
pump, unless there is an abnormality such as
excessive change in coolant level, discolora-
tion of coolant, or milky transmission oil.
1. Remove:
• Bearing
1
• Oil seal
2
INSPECTION
EC444200
Impeller shaft
1. Inspect:
• Impeller shaft
1
Bend/wear/damage
→
Replace.
Fur deposits
→
Clean.