56
CRANKSHAFT ASSEMBLY
Measuring Connecting Rod
(Small End Inside Diameter)
NOTE: The crankshaft and connecting rod is a
non-serviceable assembly. If any component is out
of specification, the assembly must be replaced.
1. Insert a snap gauge into the upper connecting rod
small end bore; then remove the gauge and measure
it with micrometer.
CC290D
2. Maximum diameter must not exceed specifications.
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 con-
necting 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 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.
NOTE: Proceed to check runout on the other end of
the crankshaft by positioning the indicator contact at
point 2 and following steps 3-4.
Measuring Crankshaft
(Web-to-Web)
1. Using a calipers, measure the distance from the outside
edge of one web to the outside edge of the other web.
CAUTION
After correcting tooth contact, backlash must again be
checked and corrected (if necessary). Continue the cor-
recting backlash/correcting tooth contact procedures
until they are both within tolerance values.
CAUTION
Care should be taken to support the connecting rod
when rotating the crankshaft.
Manual
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