DISASSEMBLY AND INSPECTION:
DISASSEMBLY:
1.Remove only those structural members and fixtures required to gain access to the index drive and to allow for complet- ing the necessary procedures.
2.Drain oil and flush with flushing solvent. Retain any chips or broken pieces you may find. These may aid in diagnosis.
2.1.Oil may be drained by removing Magnetic Drain Plug (Item #23).
2.2.Alternatively, oil may be drained by removing Cover (Item#7) and pumping the oil from the unit's sump.
3.Remove socket head cap screws (Item #
27)and Cover (Item #6).
INSPECTION:
1.While slowly rotating input, inspect cam (Item #4) surface to determine if cam must be replaced. Inspect for a rough or rip- pled surface, gouge marks, pitting and other imperfections.
WARNING
CAMCO's Heavy Duty "E" Series Index Drives cannot be "hand cranked" when completely assembled, i.e. with follower wheel installed. During some portions of repair, the motor drive package is used to rotate the input shaft and follower wheel. Some means for running the motor at extremely low speeds is manda- tory. Use extreme caution when operating the motor during repairs.
2.Slowly index the unit and place the Index Drive in a dwell position.
2.1.While manually applying torque to the output follower wheel (Item #2), check for
2.2.Visually observe the surface of the outer shell. Inspect followers for damage or radial looseness. Looseness should not exceed .001 inch. Do not confuse radial looseness with axial endplay. End play will be from .03 to .06 inch as a normal con- dition. If endplay exceeds .06 inch the followers should be replaced.
NOTE: Generally, cam followers are replaced as added insurance against later failure. When in doubt, replace the cam followers.
3.Broken cam followers indicate possible damage to the follower wheel. Remove any broken cam followers. See the sec- tion titled "Cam Follower Replacement", in this Service Manual. Inspect the cam follower stud hole in the follower wheel for damage, and to determine whether the cam follower stud hole is "wallowed out", elongated, oval, etc. Using the nominal size of the cam follower stud as a guide, verify a press fit between the stud and the hole,
4.Wobbling of the output or grinding noises during each index indicate damage to the output bearing (Item #5). Further inspection requires removal of the follow- er wheel. See the section titled "Follower Wheel and Output Bearing Replacement" in this Service Manual.
5.Replace cam followers if loose in dwell or if the outer shell is visibly damaged. See the section titled "Cam Follower Replacement" in this Service Manual.
6.Replace the cam if imperfections are noted. See the section titled "Cam and/or Input Shaft Replacement" in this Service Manual.
7.Replace the follower wheel if holes are oversized. See the section titled "Follower Wheel and Output Bearing Replacement" in this Service Manual.
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