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8.5 Disassembly
1. Remove only those structural members and fixtures required to gain access to front
cover (Item #2) of the index drive.
2. Drain oil and flush with solvent. Retain any chips or broken pieces as these may aid in
diagnosis. Dispose or recycle waste oil and solvent properly. Oil dry or other oil collecting
items such as paper towels will be required to keep the work area safe and clean.
3. Oil may be drained by removing the magnetic drain plug (Item #5). Small metal fillings
are collected by this plug. Clean them off before reinstalling the plug.
4. Alternatively, oil may be drained by removing the breather (Item #4) and pumping the oil
from the unit's sump.
5. Remove SHCSs (Item #3) and Cover (Item #2).
CAMCO's MDE Series Index Drives cannot be moved manually when fully
assembled. During the Inspection and repair, the motor drive package may be
required to rotate the indexer. Some safe means for running the motor at
extremely low speeds is needed. The motor brake if present must be released
using electric power. Use extreme caution when operating a live motor during
i n s pec t i o n a nd repair.
Manually rotating the motor.
An alternative to using a live powered motor is to turn the motor by turning the
motor fan. Make sure the motor brake is electrically released or use the lock
out set screw to keep it released. Remove the motor fan cover and carefully
turn the motor using the motor fan blades – turn several of the blades all at the
same time.
8.6 Inspection
1.
While slowly rotating input, inspect t h e cam track (Item #8) surface to determine if the cam must
be replaced. Inspect for a rough, matted or rippled surface, gouge marks, pitting and other
imperfections.
2.
Slowly turn the unit and
2.1.
Check for pre-load of the two cam followers in dwell. G r asp t he cam f ollo wer s t hat
straddle the cam rib (Item #31). Try to rotate them. If they rotate they should be replaced.
STOP
the Index Drive in a mid-dwell position as shown.
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