Disassembling The Water Pump; Checking The Water Pump; Assembling The Water Pump - Yamaha MT-09 2021 Service Manual

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".
1
2. Remove:
• Bearing "1"
• Oil seal "2"
TIP
Remove the oil seal and bearing from the out-
side of the water pump housing "3".
2
1
3. Remove:
• Mechanical seal (impeller side) "1"
(from the impeller, with a thin, flat-head
screwdriver)
TIP
Do not scratch the impeller shaft.
G089034
2
3
6-13
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.
3
2
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"
New
• Bearing "2"
New
(into the water pump housing "3")
Installed depth "a"
0.5–1.0 mm (0.02–0.04 in)
TIP
Install the oil seal with a socket that matches its
outside diameter.
2
2. Install:
• Mechanical seal (housing side) "1"
WATER PUMP
3
1
New
1
a