CAC Gasoline Engine Maintenance And Servicing Manual
49
——If relief valve spring is not to specification, it must be
replaced.
Installation：
——Install the outer and inner rotor into the oil pump house
ensuring the installation mark of outer and inner rotor upward.
——Install oil pump cover on oil pump. Tighten seven chamfer
head screws. tightening torque is 7-10Nm.
——Install relief valve and relief valve spring into the oil pump
bore.
——Screw 3/8″plug screw into the oil pump house. keep it in
place. tightening torque is 20-25Nm.
——Stick the new oil pump sealing gasket on the front end of
cylinder block.
——Install the oil pump into the front end of crankshaft. center
the inner bore of inner rotor Before installation.
——Screw six mounting bolts by hand.
——Check and adjust the roughness of lower surface of oil pump
and flange surface of cylinder block oil pan. It should be within the
range:±0.26mm.
——Tighten the retaining bolt of oil pump to 8-11Nm.
——Apply the engine oil on the oil seal journal of crankshaft.
——Wrap a plastic tape on the oil seal journal of crankshaft
avoiding to damage the edge of front crankshaft oil seal .
——Apply engine oil on the edge of front crankshaft oil seal.
Press the oil seal in place using appropriate socket or sleeve and
crankshaft pulley and pulley bolt and washers.
Fig. 87
Fig. 88
Fig. 89
Fig. 90
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