Oil Pump; Checking The Oil Pump; Assembling The Oil Pump; Installing The Oil Pump - Yamaha YZ450FP 2023 Owner's Service Manual

EAM30136

CHECKING THE OIL PUMP

1. Check:
• Oil pump cover
• Oil pump drive shaft
• Oil pump housing
Cracks/damage/wear  Replace the oil
pump assembly.
2. Check:
• Oil pump operation
Rough movement  Repeat step (1) or re-
place the oil pump assembly.
EAM30137

ASSEMBLING THE OIL PUMP

1. Install:
• Oil pump drive shaft "1"
• Dowel pin "2"
• Inner rotor 2 "3"
• Outer rotor 2 "4"
TIP
• Apply the engine oil on the oil pump drive shaft,
inner rotor 2, and outer rotor 2.
• Fit the dowel pin into the slit in the inner rotor 2.
4
3
1
2
2. Install:
• Oil pump cover "1"
• Oil pump cover bolt "2"
Oil pump cover bolt
6 N·m (0.6 kgf·m, 4.4 lb·ft)
LOCTITE®
1
3. Install:
• Washer
• Dowel pin "1"
• Inner rotor 1 "2"
• Outer rotor 1 "3"
• Circlip "4"
TIP
• Apply the engine oil on the inner rotor 1 and
outer rotor 1.
• Fit the dowel pin into the groove in the inner ro-
tor 1.
EAM30486

INSTALLING THE OIL PUMP

1. Install:
• Oil pump assembly "1"
• Oil pump assembly bolt "2"
ECA13890
NOTICE
After tightening the bolts, make sure the oil
2 pump turns smoothly.
5-64
4
3
2
1
Oil pump assembly bolt
5 N·m (0.5 kgf·m, 3.7 lb·ft)
LOCTITE®
2
1

OIL PUMP