Connecting Rod Small End Bearing Inspection - Polaris Trail Blazer Service Manual

Connecting Rod Small End Bearing Inspection

1. Clean small end of connecting rod and inspect inner
bore with a magnifying glass. Look for any surface
irregularities including pitting, wear, or dents.
2. Feel the bearing surface inside the rod and check for
rough spots, galling, or wear.
3. Clean needle bearing in solvent and dry with
compressed air.
4. Inspect needle cage carefully for cracks or shiny
spots which indicate wear. Replace needle bearing if
worn or cracked, and always replace if piston
damage has occurred.
5. Visually inspect piston pin for damage, discoloration,
or wear. Feel along the length of the pin and replace
it if any rough spots, galling or wear is detected.
6. Oil and install needle bearing and pin in connecting
rod. Rotate pin slowly and check for rough spots or
any resistance to movement. Slide pin back and
forth through bearing while rotating and check for
rough spots.
7. With pin and bearing centered in rod, twist ends back
and forth in all directions to check for excessive axial
play. Pull up and down evenly on both ends of pin to
check for radial play. Replace pin and bearing if there
is any resistance to rotation or excessive axial or
radial movement. If play or roughness is evident with
a new pin and bearing, replace the connecting rod.
Polaris Sales Inc.
Connecting Rod Small End Inspection (2 Stroke Engines)
3.39
Piston Pin Measurement Locations
ENGINE
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