Balance Shaft Removal / Inspection - Polaris 2014 Sportsman 570 EF Service Manual

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Balance Shaft Removal / Inspection

1. Rotate crankshaft to align the timing marks as shown

2. Pull upward on the balance shaft and remove it from

the crankcase.

3. Inspect drive gear for broken or damaged teeth.

9924871 R03 - 2014 Polaris Sportsman® 570 EFI Service Manual

4. Inspect bearing surfaces for scoring or signs of wear.

5. Inspect / replace the balance shaft bearings in both

Inspection / Removal" procedure in this chapter.

NOTE: Due to extremely close tolerances and

minimal wear, counterbalance shaft ball 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 bore. The inner race should be firm

with minimal side to side movement and no

detectable up and down (radial) movement.

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