Yamaha F400A 2022 - Checking the Water Pump; Checking the Shift Rod; Installing the Gear Oil Passage Check Valve; Assembling the Shift Rod Guide Plate

8-13
Water pump and shift rod
When heating the lower case, heat the en-
tire installation area evenly. Otherwise, the
paint on the lower case could be burned.
TIP:
Heat the installation area of the check valve in
the lower case “2” using a gas torch, and then
remove the check valve “1”.
Checking the water pump
1. Check:
• Upper water pump housing
Deformed → Replace.
TIP:
If the engine overheats, the inside of the water
pump housing may be deformed. Therefore,
make sure to remove the insert cartridge when
checking the upper water pump housing.
2. Check:
• Upper impeller
• Insert cartridge
• Outer plate cartridge
Cracked/worn → Replace.
3. Check:
• Lower impeller
• Lower water pump housing
Cracked/damaged → Replace.
4. Check:
•Impeller key
• Keyway in the drive shaft
Deformed/worn → Replace.
Checking the shift rod
1. Check:
• Shift rod
Bent/cracked/worn → Replace.
Installing the gear oil passage check
valve
1. Install:
• Gear oil passage check valve (lower case)
“1”
Assembling the shift rod guide plate
1. Install:
• Oil seal “1”
•O-ring
A
B
2
1
Installation height “a”
40.7–41.3 mm (1.60–1.63 in)
A. Worldwide
B. USA and Canada
New
1
a
1322D1322D1322D1322D
New
New
2
3
1
4
5
1