Removing The Oil Seal; Checking The Impeller Shaft; Checking The Impeller Shaft Gear; Checking The Oil Seal - Yamaha YZ125 2009 Owner's Service Manual

REMOVING THE OIL SEAL

• Replace the oil seal when transmission oil or
coolant leaks out from the water pump hous-
ing hole at the bottom.
• Do not reuse the removed bearing and oil
seal.
1. Remove:
• Bearing "1"
2. Remove:
• Oil seal (outside) "1"
• Oil seal (inside) "2"

CHECKING THE IMPELLER SHAFT

1. Inspect:
• Impeller shaft "1"
Bend/wear/damage → Replace.
Fur deposits → Clean.

CHECKING THE IMPELLER SHAFT GEAR

1. Inspect:
• Gear teeth "a"
Wear/damage → Replace.
CHECKING THE BEARING
1. Inspect:
• Bearing
Rotate inner race with a finger.
Rough spot/seizure → Replace.

CHECKING THE OIL SEAL

1. Inspect:
• Oil seal "1"
Wear/damage → Replace.
INSTALLING THE OIL SEAL
1. Install:
• Oil seal (inside) "1"
• Oil seal (outside) "2"
• Apply the lithium soap base grease on the oil
seal lip.
• Install the oil seal with its manufacture's
marks or numbers facing the right crankcase
cover "3".
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WATER PUMP