3.77
ENGINE / COOLING SYSTEM
3
9923523 - 2012 RANGER RZR 570 Service Manual
© Copyright 2011 Polaris Sales Inc.
4. Separate cr ankcase by ta pping wi th a soft faced
hammer in reinforced areas and lift MAG cr ankcase
off PTO case.
Balance Shaft Removal / Inspection
1. Rotate crankshaft to align the timing marks as shown
below.
2. Pull upward on the balance shaft and remove it from
the crankcase.
3. Inspect drive gear for broken or damaged teeth.
4. Inspect bearing surfaces for scoring or signs of wear.
5. Inspect / replace the balance shaft bearings in both
crankcase halves.
Se e “ Crankcase Be aring
Inspection / Removal” procedure in this chapter.
NOTE: Due to ext remely clos e t olerances an d
minimal wear
, counterbalance shaft ba ll be arings
must be insp ected v isually an d by f eel. Loo k fo r
signs of discoloration, sc oring or gallin g. Turn the
inner race of each bearing. The bearings should turn
smoothly and quietly. The outer race of each bearing
should f it tightly in th e cra nkcase bore. The inner
race shou ld be firm wit h minimal side to side
movement and no detectable up and down ( radial)
movement.
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