3.76
9926806 R03 - 2015 - 2016 RANGER ETX / 570 2-SEAT 2015 - 2016 RANGER 570 CREW Service Manual
© Copyright Polaris Industries Inc.
BALANCE SHAFT REMOVAL / INSPECTION
1. Rotate crankshaft to align the timing marks as shown
below.
2. Install Crank-Balance Shaft Holder PA-51424
t
onto
the balance shaft and crankshaft.
3. Remove the balance shaft nut
t
and washer
r
.
4. Remove Crank-Balance Shaft Holder PA-51424.
5. Remove the balance drive gear.
6. Remove the balance shaft retainer fasteners
e
and
retainer
w
.
7. Remove the balance shaft from the crankcase.
NOTE
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 3.78.
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.
BALANCE SHAFT BEARING SERVICE
1. Remove the balance shaft assembly. See Balance
Shaft Removal / Inspection, page 3.76.
2. Remove the water pump seal
q
Refer to Water
Pump Service - ACE, page ).
3. Remove the oil seal
w
from the PTO side of the
upper engine case.
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.
ENGINE / COOLING SYSTEM
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