Camshaft Inspection - Polaris MS4000 Service And Owner's Manual

ENGINE
40. Remove balance shaft and crankshaft.
41. Remove and inspect crankshaft main journal bearings for
abnormal wear. It is recommended to replace the
bearings anytime the engine is disassembled.
3.44

Camshaft Inspection

1. Thoroughly clean the cam shaft.
2. Visually inspect each cam lobe for wear or damage.
3. Measure height of each cam lobe using a micrometer.
Compare to specification.
Cam Lobe Height
Cam Lobe Height
(Intake & Exhaust):
Std: 1.3334" (33.8674 mm)
4. Measure camshaft journal outside diameters (O.D.).
A
Camshaft Journal O.D. :
A. (Mag): 1.654" ± .00039" (42 ± .010 mm)
B. (Ctr.): 1.634" ± .00039" (41.50 ± .010 mm)
C. (PTO): 1.614" ± .00039" (41 ± .010 mm)
= In. / mm.
C
B
= In. / mm.