8
5
DISASSEMBLE OIL PUMP
Drain oil and remove oil filter. Remove engine from
equippment. Remove spark plugs.
The oil pump can be inspected or replaced without
removing the sump.
1. Remove the following parts, Fig. 10.
a. Remove oil pump cover
b. Remove inner rotor.
c. Remove outer rotor.
d. Remove shaft.
e. Remove and discard O-ring
Fig. 10
−
Remove Oil Pump
D
A
B
C
E
2. Check rotors and shaft for any obvious wear and/or
damage, Fig. 11. Replace as necessary.
If pump housing is worn or damaged the sump must be
replaced.
Fig. 11
−
Checking Oil Pump
ASSEMBLE OIL PUMP
1. Lubricate oil pump components with engine oil and as-
semble to sump, Fig. 12. Make sure drive shaft is en-
gaged in camshaft.
a. Install drive shaft.
b. Install inner rotor.
c. Install outer rotor.
d. Install new O-ring.
e. Install oil pump cover.
2. Torque screws to 50 in. lbs. (6.0 Nm).
The oil pump is virtually trouble free and requires very little
maintenance.
Fig. 12
−
Assembling Oil Pump
A
D
C
B
E
TSM
Summary of Contents for 405777 Series
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