Counter Balancer Shaft Removal/Inspection - Polaris Sportsman 400 Service Manual

ENGINE

COUNTER BALANCER SHAFT REMOVAL/INSPECTION

1. Remove the shim washer from the counter balancer
shaft.
2. Note the alignment dots on the balancer and
crankshaft gears, the marks must be aligned during
reassembly.
3. Turn the shaft until balancer counter weights clear the
crankshaft and remove the balancer shaft from the
crankcase.
4. Inspect the balancer drive gear and pump shaft drive
gear.
5. Replace the shaft if gear teeth are abnormally worn or
damaged.
6. Inspect the balancer shaft bearings.
NOTE: Due to extremely close tolerances and minimal
wear, the balancer shaft ball bearings must be inspected
visually and by feel. Look for signs of discoloration, scor-
ing 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. The in-
ner race should be firm with minimal side to side move-
ment and no detectable up and down movement.
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