LIFTER AND CAM LOBELIFTER AND CAM LOBE

Lifter face has Convex Shape Cam Lobe has taper of .0007” to .002” Lifter must spin to Dissipate Load Lifter’s convex shape prevents Edge

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LIFTER AND CAM LOBELIFTER AND CAM LOBE

Cam and Lifters become wear mated in first few minutes

If cam is replaced replace lifters also Used lifters will rapidly wear out a new cam

LIFTER AND CAM LOBELIFTER AND CAM LOBE

Lubrication and Break-in Cam is lubed by crank spray First 1/2 Hour is Critical Must use (EP) Extreme Pressure Lubricant

LIFTER AND CAM LOBELIFTER AND CAM LOBE

Minumum RPM 1500 for 15 Minutes Some OHV have oil passage in cam Oil holes on each Lobe, if plugged instant

cam failure. Oil changes are importiant to cam life.

• Page 194 Figure 8.21

CAM LOBE SHAPECAM LOBE SHAPE

Base circle Lobe Opening and Closing Flank Opening and Closing Ramp

• Page 194 Figure 8.22

CAM LOBE SHAPECAM LOBE SHAPE

Lift Duration Overlap

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