CRANKSHAFTS & CAM GEARS
Checking Compression Release Cam
Model Series 111200, 111900
This cam gear has Easy-Spin® plus a compression
release on the exhaust cam. In the starting position, the
actuator cam moves the rocker cam so it will open the
exhaust valve at the same time as the Easy-Spine lobe.
When the engine starts, the actuator cam moves out and
lets the rocker cam move down and the exhaust valve
To check, move actuator cam to the running position,
Fig. 10. Push rocker cam against the actuator cam.
Release the actuator cam. Actuator cam spring should
pull actuator cam against the shoulder pin causing rocker
cam to raise up to starting position. Fig. 11. There
should be no binding. Replace if binding exists.
Fig. 10. Running Position
Fig. 11. Start Position
The ball bearing is a press fit on the crankshaft. If either
bearing or crankshaft is to be removed, use an arbor
press, as shown in Fig. 12.
Fig. 12. Removing Ball Bearing
Heat bearing in hot oil [250°F max. (120°C)]; bearing
must not rest on the bottom of the pan in which it is
heated. Place crankshaft in vise with bearing side up.
When bearing is quite hot it will become a slip fit on the
bearing journal. Grasp bearing with the shield down and
thrust it down on the crankshaft, Fig. 13. The bearing
will tighten on the shaft while cooling. DO NOT
NOTE: Bearing shield faces crankshaft crankpin.
Fig. 13. Installing Ball Bearing