Polaris 850 PRO-RMK 155 2.6" QD 2021, Manual

Page: 287 / 747

3
9850060 R02 - 2020-2021 850 AXYS™ Long Track Snowmobile Service Manual
© Copyright Polaris Inc.
3.87
CRANKSHAFT TRUING
When rebuilding and straightening a crankshaft, straightness is of utmost importance. Run-out must be as close to
zero as possible.
Before truing the crankshaft lubricate the bearings and clamp the crankshaft securely in the holding fixture. If truing the
crankshaft requires striking with a hammer, support crankshaft to prevent bearing damage and re-check previously
straightened areas to verify trueing. Refer to the illustrations below.
Crankshaft Alignment Kit:
2870569
NOTE
The rod pin position in relation to the dial indicator tells you what action is required to straighten the shaft.
CRANKSHAFT TRUING EXAMPLES
High at point
q
If point
q
measures high, strike the shaft point
shown with a brass hammer.
High at point
w
If point
w
measures high, squeeze the
crankshaft as shown.
High at point
e
If point
e
measures high, spread the
crankshaft as shown.
ENGINE / COOLING / EXHAUST