CAM REMOVAL:
1.Once the input shaft has been removed, use one of two methods to lower the cam into the bottom of the housing.
1.1.Use a lift ring on the end of the treaded rod and a boom crane to lift the cam slightly, i. e. to relieve strain on the hex nut. Then while using the lift ring to support the cam, loosen the hex nut and back it off several inches. Use the boom crane to lower the cam into the bottom of the housing. See sketch titled
1.2.Or without using a lift ring (no access for a boom crane), slowly loosen the hex nut and lower the cam into the bottom of the housing.
CAUTION
See "Approximate Weights" within this service manual for sizing the lifting device. Make sure the cam is supported.
2.Once the cam is sitting on the bottom of the housing, remove the threaded rod, etc.
3.Use one of two methods to get the cam out of the housing cavity.
3.1.Place a "Nylon Strap" through the bore of the cam, and while pulling on the strap, roll the cam out of the housing.
3.2.Alternatively, insert a piece of threaded rod with a lift ring into the tapped hole in the cam and using the lift ring, pull the cam out of the housing cavity.
CAM INSTALLATION:
Instructions for replacing the cam assume the follower wheel was not removed.
Before proceeding with installation of the new cam, install all but two new cam followers. Manually pull the follower wheel into a posi-
tion where one or more cam followers are over the housing cavity. Use a
Do not install the last two (2) cam followers until the input shaft and cam have been installed.
Once all but two (2) cam followers have been replaced, place the cam inside the housing cavity.
1.Before placing the cam inside the housing cavity, check the input shaft diameter and the cam bore size to ensure a slip fit.
1.1.The input shaft can be installed in the cam and then removed to ensure a slip fit.
1.2.If the input shaft binds during installation, hone the cam bore to provide a slip fit.
CAUTION
The cam must be a slip fit or slight press fit, but the fit cannot be loose. Do not remove an excessive amount of material.
2.The cam can be either rolled into the hous- ing cavity, or it can be lifted and pushed into the housing cavity. Use the best method as determined by the situation.
3.Regardless of the method used to place the cam in the housing cavity, placing the cam into the housing cavity will be an awkward process.
CAUTION
Make sure the cam is not damaged during this process.
4.Install threaded rod and lift ring into the lift- ing hole in the cam. Then lift the cam so the input shaft can be pushed through the cam.
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