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NOTE: The lower balance gear should be installed
after the crankshaft has been installed.
1.
Lubricate the crankshaft rear bearing surface.
Insert the PTO end of crankshaft through rear
bearing. Align the primary timing mark on
crankshaft with the primary timing mark on
upper balance gear. Refer to Figure
12-17.
Press the crankshaft into rear bearing until the
crankgear just starts to mesh (about
1 /16")
with the center ring of balance gear teeth.
Balance Gear
Crankshaft
Secondary Timing Mark
Figure 12-17. Timing Marks On Balance Gear
And Crankshaft.
NOTE: If the crankshaft and bearing plate have not
been separated, position the fuel line and wiring
harness between the bearing plate and crankcase
before pressing the crankshaft all the way in.
2.
Align the primary timing mark on the crank-
shaft with the timing mark on the camshaft
gear. Refer to Figure
1 2-15.
Press the crank-
shaft all the way into the rear bearing. Make
sure the camshaft and crankshaft gears mesh
and that the timing marks align while pressing.
3.
Position the crankshaft so it is about
15
o
past
BDC. Install
3/8"
spacer, and one
.010"
shim
spacer. Align the secondary timing mark on
the lower balance gear with the secondary tim-
ing mark on the crankshaft. Install the lower
balance gear on the stub shaft. If properly
timed, the primary timing mark on the crank-
shaft will now be aligned with the secondary
timing mark on the lower balance gear. Refer
to Figures
12-9
and
12-17.
4.
Install one (1)
.020"
shim spacer and retaining
ring (rounded edge towards gear). Check end
12.6
play of lower balance gear as instructed under
"INSTALL BALANCE GEARS." Refer to Figures
12-9
and
1 2-1 0.
5.
Check the timing of the crankshaft, camshaft,
and balance gears.
•
The primary mark on crankshaft should align
with the primary timing mark on upper bal-
ance gear. Refer to Figure
12-17.
•
The primary mark on crankshaft should align
with the secondary timing mark on lower
balance gear. Refer to Figure
12-16.
•
The primary mark on crankshaft should align
with timing mark on camshaft. Refer to Fig-
ure
12-15.
If the marks do not align, the
timing is incorrect and must be corrected.
2A) NEW STYLE BALANCE GEAR ASSEMBLY -
WITH A BALANCE GEAR TIMING TOOL
1 .
Count and mark the teeth on the crankshaft
gear, and the lands (notches between teeth)
on the camshaft gear as follows:
Crankshaft - Locate the primary timing mark
on crankshaft. While looking at the PTO end of
crankshaft, start with the tooth directly below
timing mark and count five (5) teeth in a
counterclockwise direction. Mark the fifth
tooth. Refer to Figure
12-18.
Figure 12-18. Marking Tooth On Crankshaft
Gear.
Camshaft - Locate the timing mark on cam-
shaft. Starting with the land next to the timing
mark, count five (5) lands in a counterclock-
wise direction. Mark the fifth land. Refer to
Figure
12-19.
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