Yamaha YP125R, Service Manual

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WATER PUMP (YP250R)
6-14
EAS26510
DISASSEMBLING THE WATER PUMP
1. Remove:
• Rubber damper holder “1”
• Rubber damper “2”
(from the impeller, with a thin, flat-head
screwdriver)
TIP
Do not scratch the impeller shaft.
2. Remove:
• Water pump seal “1”
TIP
Remove the water pump seal from the inside of
the water pump housing.
3. Remove:
• Bearing “1”
• Oil seal “2”
TIP
Remove the bearing and oil seal from the out-
side of the water pump housing.
EAS26550
CHECKING THE WATER PUMP
1. Check:
• Water pump housing cover
• Water pump housing
• Impeller shaft
Cracks/damage/wear
→
Replace.
2. Check:
• Bearing
Rough movement
→
Replace.
EAS26570
ASSEMBLING THE WATER PUMP
1. Install:
• Oil seal “1”
(into the water pump housing)
TIP
• Before installing the oil seal, apply tap water or
coolant onto its outer surface.
• Install the oil seal with a socket that matches its
outside diameter.
2. Install:
• Water pump seal “1”
TIP
• Install the water pump seal with the special
tools.
• Before installing the water pump seal, apply
Yamaha bond No.1215 (Three Bond
No.1215®) “2” to the water pump housing “3”.
1
1
2
Installed depth of oil seal “a”
8.1–8.7 mm (0.32–0.34 in)
New
1
a
New
New