CHAPTER 3A ENGINE 260/ 300 / 400 cc ATV SERVICE MANUAL09.0
CHAPTER 3 ENGINE PAGE. 3A- 56
OIL PUMP INSPECTION
1. Inspect:
zDrive gear (oil pump) c
zPump housing
zPump housing cover
Wear /cracks/ damage → Replace.
2. Measure:
z Tip clearance
(between the inner rotor c and the outer rotord)
zSide clearance
(between the outer rotor d and the pump
housing e )
zHousing and rotor clearance
(between the pump housing e and the rotors c
d)
Out of specification → Replace the oil pump
assembly.
Tip clearance
□
A :
0.10-0.34 mm <Limit: 0.40mm>
Side clearance
□
B :
0.013-0.036mm <Limit:0.15mm>
Housing and rotor clearance
□
C :
0.04-0.09 mm <Limit: 0.15mm>