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Note position of boss
Forked or female rod –
assemble to rear cylinder
rim of top wheel until wheels are concentric. Tighten nut,
recheck with straightedge at frequent intervals.
9.
Tighten crank pin nut to 150-185 ft-lbs (203-251 Nm).
See
Figure 3-85.
Install flywheel assembly in
TRUING STAND (Part No. HD-96650-80)
Adjust so centers are snug. Wheels must turn freely;
however, shafts must not be loose in centers. If flywheel
assembly is either loose or squeezed, indicators will not
indicate accurately. Adjust indicators to take reading as
near to flywheels as possible, so pointers read at about
the middle of the scales.
10. Turn flywheels slowly and observe the movement of indi-
cator pointers. Movement toward flywheels indicate high
points of shafts. Find highest point of each shaft and
chalk-mark flywheel rims at those points. Remove fly-
wheel from stand and make corrections as follows:
11. See
Figure 3-84.
Flywheel may be out of true three ways,
A, B and C or a combination of two of the three ways.
12. When wheels are both out of true as indicated in A,
tighten C-clamp on rims or wheels opposite crank pin
and lightly tap the rim at the crank pin with lead or copper
mallet.
13. When wheels are both out of true as indicated in B, drive
a hardwood wedge between the wheels opposite the
crank pin and lightly tap the rims near the crank pin with
a lead or copper mallet.
14. When wheels are out of true as indicated in C, strike the
rim of the wheel a firm blow at about 90 from crank pin
on high side.
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Note position
of radius
Figure 3-82. Installing Connecting Rods
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FLYWHEEL
as shown.
15. When wheels are out of true in a combination of any of
the conditions shown, correct C first, tapping rim of
offending wheel only, and then correct condition A or B.
16. See
take reading from indicator. Repeat truing operation until
indicated shaft runout does not exceed 0.001 in.
(0.025 mm) (each graduation on indicator is 0.002 in.
(0.05 mm)).
Male rod – assemble to front cylinder
Large radius
MALE ROD
Figure 3-83. Squaring Flywheel Faces
Figure 3-85.
Readjust centers, revolve wheels and
.
3-59
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