Yamaha WR250F 2017 Owner's Service Manual page 321

REMOVING THE OIL SEAL
EAS2GBB333
TIP
• Remove the oil seal when the coolant level
changes frequently more than usual, coolant
has discolored, or engine oil has become
milky.
• Do not use the removed oil seal.
1. Remove:
• Oil seals "1"
1
CHECKING THE WATER PUMP
EAS2GBB334
1. Check:
• Water pump housing cover
• Impeller shaft
Cracks/damage/wear  Replace.
CHECKING THE BEARING EAS2GBB335
1. Check:
• Bearing
Rotate the inner race with your finger.
Rough spot/seizure  Replace.
INSTALLING THE OIL SEAL
EAS2GBB336
1. Install:
• Oil seals "1"
New
TIP
• Apply the lithium-soap-based grease on the
oil seal lip.
• Install the oil seal with its manufacture's
marks or numbers facing the right crankcase
cover "2".
New
1
LS
2. Install:
• Bearing "1"
TIP
Install the bearing by pressing its outer race
parallel.
1
ASSEMBLING THE WATER PUMP
EAS2GBB337
1. Install:
• Impeller shaft assembly "1"
• Washer "2"
• Pin "3"
• Gear "4"
• Collar "5"
• Circlip "6"
TIP
• Take care so that the oil seal lip is not dam-
aged or the spring does not slip off its posi-
tion.
• Apply the lithium-soap-based grease on the
impeller shaft.
1
7-6
WATER PUMP
2
LS
New
4
3
2
LS
1 New
6
5 2
New