13-2
SECTION 13: ENGINE ASSEMBLY
Note: The number
1
on #1 connecting rod and the number
2
on #2 connecting rod must be facing PTO side.
Important: Failure to use a torque wrench can result in loose
connecting rod screws causing breakage or tight connecting rod
screws causing scoring.
INSTALL CAMSHAFT
Lubricate tappets, camshaft journals and lobes with engine oil.
1. Install tappets.
2. Align timing marks on camshaft and crankshaft gear and install
camshaft, Figure 13-5.
3. Assemble governor spool to governor shaft.
a. Make sure that spool engages flyweights, Figure 4-2.
b. Clean all old gasket material from crankcase and cover.
c. Install new oil passage o-ring in crankcase, Figure 13-6.
TIMING MARKS
Figure 13-5. Installing Camshaft
OIL
PASSAGE
O-RING
Figure 13-6. Crankcase Oil Passage O-ring
INSTALL OIL PUMP
1. Lubricate inner and outer gerotor and set in place.
2. Install oil pump cover.
3. Torque screws to 12.2 Nm (108 in. lbs.). See Figure 13-7.
Figure 13-7. Installing Oil Pump
INSTALL CRANKCASE COVER
Lubricate PTO seal and cam gear bearing.
1. Rotate governor shaft counterclockwise so that the paddle rests
against the oil pump pick-up, Figure 13-8.
2. Rotate the inner gerotor so it aligns with the camshaft drive.
Figure 13-8. Rotating Governor Shaft
3. Install crankcase cover with new gasket.
Note: If the oil pump drive is not aligned, the cover will not slide
completely on. Turning the crankshaft may align the oil pump drive.
4. Install governor support bracket.
a. The allen head crankcase bolt may need to be backed
off.
5. Torque screws in sequence shown to 47.5 Nm (35 ft. lbs.), Figure
13-9.
6. Check crankshaft end play. If less than 0.05mm (.002”) there may
be an assembly problem.
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