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ENGOIL PUMP
OIL PUMP
Extent of removal: 1 Oil pump removal
Extent of removal Order Part name Q’ty Remarks OIL PUMP REMOVAL
Preparation for removal Clutch and primary drive gear Refer to “CLUTCH AND PRIMARY  DRIVEN GEAR” section.
1
1
1
1
1
1
1
1 Rotary filter
2  Oil pump drive gear
3 
Washer
4   Oil pump assembly
5  Gasket
6   Oil strainer 
     
        
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ENGOIL PUMP
INSPECTION
Oil pump
1. Inspect:
Oil pump drive gear
Oil pump driven gear
Oil pump housing
Oil pump cover
Cracks/wear/damage → Replace.
2. Measure:
Tip clearance Å 
(between the inner rotor 1 and the
outer rotor 2)
Side clearance ı 
(between the outer rotor 2 and the oil
pump housing 3)
Out of specification → Replace the oil
pump assembly.
Housing and rotor clearance Ç 
(between the pump housing 3 and the
rotors 1 2)
Out of specification → Replace the oil
pump assembly.
Tip clearance Å:
0.15 mm (0.0059 in)
: 0.20 mm (0.0079 in)
Side clearance ı:
0.06 ~ 0.10 mm 
(0.0024 ~ 0.0039 in)
: 0.15 mm (0.0059 in)
Housing and rotor clearance Ç:
0.06 ~ 0.10 mm 
(0.0024 ~ 0.0039 in)
: 0.15 mm (0.0059 in)
Rotary filter
1. Inspect:
Rotary filter
Cracks/damage → Replace. 
     
        
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ENGOIL PUMP
Oil strainer1. Inspect:
●Oil strainer
Cracks/damage  → Replace.
Contamination  → Clean the flushing oil.
ASSEMBLY AND INSTALLATION
Oil pump
1. Install:
●Oil pump housing  1 
●Outer rotor  2 
●Inner rotor  3 
●Pin  4 
●Oil pump shaft  5 
●Pin  6 
●Oil pump cover  7 
●Washer  8 
●Circlip  9 
●Conical spring washer  0 
●Oil pump driven gear  A 
●Circlip  B 
●Screws  C 
NOTE:
●Apply engine oil onto the outer rotor, inner
rotor and oil pump shaft.
●Install the conical spring washer in the direc-
tion as shown.
2. Install:
●Oil strainer
●Gasket
●Oil pump assembly
●Screws (oil pump assembly)
NOTE:
Apply engine oil onto the crankcase oil pas-
sage and oil pump assembly.
New
New
T R..5 Nm (0.5 m · kg, 3.6 ft · lb)
New
T R..7 Nm (0.7 m · kg, 5.1 ft · lb)
NOTE:
● Install the oil pump drive gear with its groove
a  facing the engine.
●Install the rotary filter with the dog  b facing
out.
●Align the rotary filter dog  b with groove  c of
the crankshaft.
3. Install:
● Washer  1
●  Oil pump drive gear  2
● Rotary filter  3 
● Install the  washer with stamped "H" for the
side of the engine.