3.80
9926806 R03 - 2015 - 2016 RANGER ETX / 570 2-SEAT 2015 - 2016 RANGER 570 CREW Service Manual
© Copyright Polaris Industries Inc.
ENGINE ASSEMBLY - LOWER END
CRANKCASE ASSEMBLY
1. Clean upper and lower crankcase sealing surface to
remove all old sealant and oil residue.
2. Place crankcase cylinder side down on a sturdy work
bench.
3. On the upper crankcase, install the chain guides.
Torque fasteners to specification.
TORQUE
Camshaft Chain Guide Screws:
7 ft-lbs (10 Nm)
NOTE
The chain guides must be installed before assembling
the upper and lower crankcases.
4. Lubricate all crankcase bearings with engine oil.
5. Slide a new crankshaft seal over the PTO end of the
crankshaft with numbers facing OUT. Be sure seal lip
does not fold back when moving over the crankshaft
flange.
CAUTION
Wipe the crankshaft seal O.D. with isopropyl alcohol
before installation.
Do not lubricate the crankcase seal O.D.
6. Loosely install the cam chain retainer plate and
screw into the lower crankcase.. Install the cam
chain onto the drive gear on the crankshaft. Install
the crankshaft into the lower crankcase.
NOTE
The cam chain must be installed on the crankshaft
during crankshaft installation into the lower crankcase.
Once the crankcases are mated and the retainer plate
secured, the cam chain will be held in place on the
crankshaft.
7. Be sure crankshaft is fully seated and rotates
smoothly.
NOTE
The crankshaft PTO seal can be replaced with the
engine installed in the chassis. The engine does not
have to be removed and the crankcase does not have
to be separated to replace the crankshaft seal.
8. Apply a thin film of Crankcase Sealant (PN 2871557)
evenly to the clean and oil-free lower crankcase
mating surface.
Crankcase Sealant:
PN 2871557
9. Verify alignment pins location and install lower
crankcase onto upper crankcase assembly while
pressing the PTO seal firmly against the bearing
race.
10. Install and torque crankcase bolts in sequence to
specification:
TORQUE
Crankcase Screws::
7 ft-lbs (10 Nm) (In Sequence)
ENGINE / COOLING SYSTEM
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