3-41
3
1. If backlash measurement is less than specified,
remove an existing shim, measure it, and install a
new thinner shim.
2. If backlash measurement is more than specified,
remove an existing shim, measure it, and install a
thicker shim.
NOTE: Continue to remove, measure, and install
until backlash measurement is within tolerance.
Note the following chart.
After backlash and tooth contact are within specifica-
tions, apply red Loctite #271 to the drive shaft threads
and driven output shaft threads; then using new nuts,
tighten the output shaft nut to 59 ft-lb and the output
yoke nut to 74 ft-lb.
CRANKSHAFT ASSEMBLY
Measuring Connecting Rod
(Small End Inside Diameter)
1. Insert a snap gauge into the upper connecting rod
small end bore; then remove the gauge and mea-
sure it with micrometer.
CC290D
2. Maximum diameter must not exceed specifica-
tions.
Measuring Connecting Rod
(Small End Deflection)
1. Place the crankshaft on a set of V-blocks and
mount a dial indicator and base on the surface
plate. Position the indicator contact point against
the center of the connecting rod small end journal.
2. Zero the indicator and push the small end of the
connecting rod away from the dial indicator.
3. Maximum deflection must not exceed specifications.
Measuring Connecting Rod
(Big End Side-to-Side)
1. Push the lower end of the connecting rod to one
side of the crankshaft journal.
2. Using a feeler gauge, measure the gap between the
connecting rod and crankshaft journal.
CC289D
3. Acceptable gap range must be within specifications.
Measuring Connecting Rod
(Big End Width)
1. Using a calipers, measure the width of the con-
necting rod at the big-end bearing.
2. Acceptable width range must be within specifica-
tions.
Measuring Crankshaft (Runout)
1. Place the crankshaft on a set of V blocks.
2. Mount a dial indicator and base on the surface
plate. Position the indicator contact at point 1 of
the crankshaft.
ATV-1074
3. Zero the indicator and rotate the crankshaft slowly.
4. Maximum runout must not exceed specifications.
Backlash Measurement
Shim Correction
Under 0.115 mm (0.005 in.)
Decrease Shim
Thickness
At 0.115-0.390 mm (0.005-0.015 in.)
No Correction Required
Over 0.390 mm (0.015 in.)
Increase Shim Thickness
! CAUTION
Care should be taken to support the connecting rod
when rotating the crankshaft.
Back to TOC
Back to Section TOC
Next
Back