Yamaha MT-09 2021 - Assembling the Water Pump; Checking the Water Pump; Disassembling the Water Pump

6-13
WATER PUMP
EAS30446
DISASSEMBLING THE WATER PUMP
1. Remove:
• Mechanical seal (housing side) “1”
TIP
Remove the mechanical seal (housing side)
from the inside of the water pump housing “2”.
2. Remove:
• Bearing “1”
• Oil seal “2”
TIP
Remove the oil seal and bearing from the out-
side of the water pump housing “3”.
3. Remove:
• Mechanical seal (impeller side) “1”
(from the impeller, with a thin, flat-head
screwdriver)
TIP
Do not scratch the impeller shaft.
EAS30447
CHECKING THE WATER PUMP
1. Check:
• Water pump housing cover “1”
• Impeller shaft “2”
Cracks/damage/wear → Replace.
• Water pump housing “3”
Cracks/damage/wear → Replace the water
pump assembly.
2. Check:
• Bearing
Rough movement → Replace.
3. Check:
• Water pump inlet hose
Cracks/damage/wear → Replace.
EAS30448
ASSEMBLING THE WATER PUMP
1. Install:
• Oil seal “1”
• Bearing “2”
(into the water pump housing “3”)
TIP
Install the oil seal with a socket that matches its
outside diameter.
2. Install:
• Mechanical seal (housing side) “1”
12
1
2
3
G089034
Installed depth “a”
0.5–1.0 mm (0.02–0.04 in)
1
2
3
New
New
1
2
3
a
New