Page 200 - Manual Oficina Polaris Sportsman 570 2014 a 2016

ENGINE / COOLING SYSTEM

6. Remove the balance shaft retainer fasteners e and BALANCE SHAFT BEARING SERVICE
retainer w.
1. Remove the balance shaft assembly. See Balance
7. Remove the balance shaft from the crankcase.
Shaft Removal / Inspection, page 3.77.
NOTE 2. Remove the water pump seal q Refer to Water
Pump Service - ACE, page ).
Tapping with a soft-faced hammer on the water pump
drive end of the shaft may be required.

8. Inspect drive gear for broken or damaged teeth.
9. Inspect bearing surfaces for scoring or signs of wear.
10. Inspect / replace the balance shaft bearings in the
upper crankcase. See: PTO and MAG Side
Crankcase Bearing Service, page 3.80.
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 3. Remove the oil seal w from the PTO side of the
minimal side to side movement and no detectable up upper engine case.
and down (radial) movement.
4. Support the engine case on the MAG side in a
suitable shop press. Carefully remove the balance
shaft out the mag side of the upper engine case.

CRANKCASE SEPARATION

NOTE
Before the crankcase can be separated, be sure the
entire top end, stator cover assembly and counter-
balance shaft assembly are removed from the engine
as outlined in this chapter.

1. Support the engine so oil sump cover side is facing
upward.
2. Remove the lower crankcase fasteners q.

3.78 9926803 R06 - 2014-2016 Sportsman 325 / ETX / 450 HO / 570 Service Manual
© Copyright Polaris Industries Inc.