Generac Power Systems 53187 User Manual

Page 82

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PART 2
ENGINE MECHANICAL

SECTION 2.5

ENGINE REASSEMBLY

Camshaft Assembly (Continued)

Idler Gear and Oil Pump

1. Install thrust w asher onto the idler gear shaft. Assem 

ble vane, knock pin and spring to the idler gear.

2. Align the tim ino m arks of the idler gear, crankshaft
gear and cam shaft gear (Rgure 10).

Figure 10. Idler, Crankshaft and Cam shaft Gears

3. Install the oil pum p rotor.
4. Install the oil pum p cover, shim , spring and collar.

Retain w ith snap ring. Adjust w ith shim so that side

clearance betw een pum p, rotor and vane is 0.004-
0.006 inch (0.1-0.15m m ).

CAUTION: Coat BOTH faces of the rotor and

vane with grease prior to assembly. DO NOT

ROTATE THE CRANKSHAFT UNTIL THE TIM
ING GEAR CASE IS MOUNTED.

5. Rotate the oil pum p cover to place the spring pin
insert hole to the center position. Then, assem ble the
gear case.

Timing Gear Case

Install the start spring. Insert the link into the cylin

der block hole. Install the gasket. Install the tim ing gear
case.

Figure 11. Tim ing Gear Case and Gasket

Crankshaft Pulley

Align pulley w ith key and install. Tighten to the

recom m ended torque.

CRANKSHAFT PULLEY TORQUE

72-80 Ft.-Lbs. (10-11 m-kg)

Crankshaft

Crankshaft pulley

Figure 12. Crankshaft Pulley

PAGE 2.5-3