3
9928485 R01 - 2017-2018 RANGER 500 / 570 Service Manual
© Copyright Polaris Industries Inc.
3.195
3. Place the crankshaft in a truing stand or V-blocks
and measure the runout where indicated below with
a dial indicator.
Maximum Runout:
Inner (C) - 0.00118” (0.03 mm)
Outer (D) - 0.00590” (0.15 mm)
NOTE
The MAG side crankshaft plain bearing is not
serviceable. Crankcase replacement is required if the
bearing is damaged or has excessive wear. The
crankshaft is reusable if it meets specifications and
MAG side bearing surface is not groved, pitted,
damaged or excessively worn.
PTO SIDE CRANKCASE BEARING SERVICE
WARNING
Due to extremely close tolerances and minimal wear,
the bearings must be inspected visually, and by feel.
Look for signs of discoloration, scoring or galling. Turn
the inner race of each bearing. The bearings should
turn smoothly and quietly. The outer race of each
bearing should fit tightly in the crankcase. The inner
race should be firm with minimal side to side movement
and no detectable up and down movement.
Bearings are stressed during the removal process and
must not be re-used!
Bearing Removal
1. Remove and discard the PTO side crankshaft seal
q
. Replace with new for assembly.
2. Remove the retaining ring
w
.
ENGINE / COOLING SYSTEM
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