Oil Pump Drive Shaft: Service and Repair

OIL PUMP CHAIN

REMOVAL AND INSTALLATION

Pre-removal & Post-installation Operation:

Removal Steps 1-7:

Required Special Tool:
^ MB991346: Top Cover Wrench

REMOVAL SERVICE POINT

[A] ENGINE OIL PUMP SPROCKET CENTER BOLT/ENGINE OIL PUMP DRIVE CHAIN AND ENGINE OIL PUMP SPROCKET REMOVAL





1. Hold the engine oil pump sprocket with special tool MB991346.
2. Loosen the engine oil pump sprocket center bolt and remove the engine oil pump drive chain and engine oil pump sprocket.

INSTALLATION SERVICE POINTS

]A[ CRANKSHAFT SPROCKET INSTALLATION





1. Wipe the dirt off of the crankshaft sprocket and the crankshaft using a rag, and then remove the grease from the portion shown in the illustration.

NOTE: Remove grease to prevent a drop in the coefficient of friction of the pressing portion caused by adhesion of oil.

2. Set the No. 1 piston at top dead center of the compression stroke.
3. Install the crankshaft sprocket to the crankshaft.

]B[ ENGINE OIL PUMP SPROCKET/ENGINE OIL PUMP DRIVE CHAIN INSTALLATION
1. Set the No. 1 piston at top dead center of the compression stroke.
2. Install the engine oil pump sprocket to the engine oil pump case.
3. Install the engine oil pump drive chain to the crankshaft sprocket.
4. Install the engine oil pump drive chain to the engine oil pump sprocket.