3.35
ENGINE
3
9923983 - 2012-2013 RZR 170 Service Manual
© Copyright 2012 Polaris Sales Inc.
ENGINE REASSEMBLY
Bearing / Seal Installation
NOTE: To ease crankcase bearing installation, warm
the crankcase until hot to the touch. Placing the
bearings in a freezer prior to installation will assist
the assembly process.
1. Install the bearings so the numbers are visible.
2. Drive or press the new bearings into the crankcase,
using the proper driver.
3. Install new seals with the lip facing in.
Crankcase Reassembly
Crankshaft and Cam Chain Installation
Lubricate all bearings with clean engine oil before
assembly.
1. Support the mag side crankcase cover on blocks high
enough to allow the crankshaft to drop. Install the
crankshaft using a hydraulic tool. Press on the pto
end of the crankshaft. Use care not to damage the
crankshaft end.
NOTE: Tapping the end of the crankshaft with a soft-
face hammer may also install the crankshaft. Use
care not to damage the crankshaft end.
2. Install the balance shaft into the mag side of the
crankcase.
3. Install a new gasket onto the pto case half. Applying
a thin amount of crankcase sealer to the gasket will
help hold it in place.
4. Mate the mag side case, balancer and crankshaft to
the PTO side.
During installation of the crankshaft,
loop the cam chain down into the chain room and over
the pto end.
5. Press the mag and pto assembles together using a
press. Verify the balance shaft is seated and both
shafts turn freely once installed.
P r es s b e a r i n g s o n l y o n o u t e r r a c e o f b e a r i n g t o
prevent bearing damage.
Press seals only on outer diameter
to prevent damage.
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