Yamaha TMAX 2020 - Disassembling the Water Pump; Checking the Water Pump; Assembling the Water Pump

6-13
WATER PUMP
EAS30446
DISASSEMBLING THE WATER PUMP
1. Remove:
• Mechanical seal (impeller side) “1”
(from the impeller, with a thin, flathead screw-
driver)
TIP
Do not scratch the impeller shaft.
2. Remove:
• Mechanical seal (housing side) “1”
TIP
Remove the mechanical seal (housing side)
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.
EAS30447
CHECKING THE WATER PUMP
1. Check:
• Water pump housing cover
• Water pump housing
• Impeller shaft
Cracks/damage/wear  Replace.
2. Check:
• Water pump inlet pipe
• Water pump outlet pipe
Cracks/damage/wear  Replace.
EAS30448
ASSEMBLING THE WATER PUMP
1. Install:
• Oil seal “1”
• Bearing “2”
(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.
• Install the oil seal from the inside of the water
pump housing.
2. Install:
• Mechanical seal (housing side) “1”
(into the water pump housing “2”)
NOTICE
ECA20330
Never lubricate the mechanical seal (hous-
ing side) surface with oil or grease.
TIP
Use the special tool and a press to press the me-
chanical seal (housing side) straight in until it
touches the water pump housing.
G089034
Installed depth of oil seal “a”
11.5 mm (0.45 in)
New
New
New
New
New