Crankshaft Straightening - Polaris Sportsman 400 Service Manual

ENGINE

CRANKSHAFT STRAIGHTENING

Lubricate the bearings and clamp the crankshaft securely in the holding fixture. Refer to the illustrations below.
Crankshaft Alignment Fixture
PN 2870569
NOTE:The rod pin position in relation to the dial indicator position tells you what action is required to straighten
the shaft.
1. To correct a situation like the one shown in the
illustration at right, strike the shaft at point A with a
brass hammer.
2. To correct a situation like the one shown in the
illustration at right, squeeze the crankshaft at
point A. (Use tool from alignment kit).
3. If the crank rod pin location is 180_ from the dial
indicator (opposite that shown above), it will be
necessary to spread the crankshaft at position A
as shown in the illustration at right.
rebuilding and straightening a crankshaft, runout
must be as close to zero as possible.
NOTE:Maximum allowable runout is .0024I.
3.12
- projex@inbox.lv -
SUPPORT CRANKSHAFT
HERE.
When
HIGH .004 (.1mm)
HIGH .004 (.1mm)
A
B
HIGH .002 (.05mm)
HIGH .005 (.13mm)
A A
HIGH .002 (.05mm)
A
A
HIGH .005 (.13mm)