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17. If it is impossible to true wheels, check for a cracked fly-
wheel, damaged or enlarged tapered hole or a sprocket
or pinion shaft worn out-of-round at surface where indi-
cator reading is being taken.
18. See
Figure 3-86.
When wheels are true, check connect-
ing rod side play with thickness gauge as shown. If it is
greater than tolerance shown in
CONNECTING ROD
draw up crank pin nuts until within
tolerance. Insufficient play between rods and flywheel
face is caused by one of the following conditions:
a.
Flywheels and crank pin assembled with oil on
tapers and nut over-tightened. Disassemble, clean
and reassemble.
b.
New flywheel washers installed and not fully seated.
Disassemble, inspect, replace deepest seating fly-
wheel or crank pin. As last resort, grind down width
of forked rod.
c.
Taper holes enlarged as a result of having been
taken apart several times. Replace deepest seating
wheel.
d.
Cracked flywheel at tapered hole. Replace flywheel.
4179
Flywheel Truing Stand
(Part No. HD-96650-80)
3-60
SPECIFICATIONS,
Figure 3-85. Truing Flywheel
www.PlanDeGraissage.org
xlh0383
Crank pin
Figure 3-84. Correcting Flywheel Alignment
19. After rod side play is checked and adjusted, check that
crank pin nut is tightened to specified torque, again
check wheel trueness on truing device. Correct any
runout as above.
Hardwood wedge
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