Service Manual

6-8 LUBRICATION SYSTEM
Oil Pump
Oil Pump Removal
•
Remove:
Air Cleaner (see Fuel System chapter)
Recoil Starter (see Electrical System chapter)
Fuel Tank (see Fuel System chapter)
Flywheel (see Electrical System chapter)
Crankcase Cover (see Camshaft/Crankshaft chapter)
Camshaft (see Camshaft/Crankshaft chapter)
Connecting Rod (see Camshaft/Crankshaft chapter)
Crankshaft (see Camshaft/Crankshaft chapter)
•
Remove the oil pump assembly [A].
Oil Pump Installation
•
Fill the rotor housing with engine oil for initial lubrication.
•
Install the pump assembly [A] in the crankcase.
•
Install the other removed parts.
Oil Pump Inspection
•
Remove the oil pump (see Oil Pump Removal).
•
Visually inspect the outer and inner rotor.
If there is any damage or uneven wear, replace them.
Check the clearance [A] between the inner and outer rotor
with a feeler gauge. Measure the clearance between the
high point of the inner rotor and the high point of the outer
rotor.
If the measurement exceed the service limit, replace t he
rotors as a set.
Inner and Outer Rotor Clea rance
Service Limit: 0.14 mm (0.006 in.)
•
Measure the outside diameter [A] of the outer rotor with a
micrometer at several points.
If the rotor diameter is less than the service limit, replace
both the inner and outer rotor.
Outer Rotor Outside Diameter
Service Limit: 22.940 mm(0.9031 in.)
•
Measure the thickness [B] of the outer rotor with a mi-
crometer at several points
If the rotor thickness is less than the service limit, replace
both the inner and outer rotor.
Outer Rotor Thickness
Service Limit: 11.960 mm (0.4709 in.)