Yamaha YZ450FP 2023, Owner'S Service Manual

Page: 260 / 388

OIL PUMP
5-64
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.
2. Install:
•
Oil pump cover “1”
• Oil pump cover bolt “2”
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”
NOTICE
ECA13890
After tightening the bolts, make sure the oil
pump turns smoothly.
Oil pump cover bolt
6 N·m (0.6 kgf·m, 4.4 lb·ft)
LOCTITE®
1
3
4
2
T
R
.
.
1
2
Oil pump assembly bolt
5 N·m (0.5 kgf·m, 3.7 lb·ft)
LOCTITE®
1
2
3
4
T
R
.
.
2
1