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Feed Rate Wear
Definition
Indication of wear is apparent when the feed rate control
makes a skipping or ratcheting sound. The pump output is less
than the desired setting.
Feed Rate Wear
Causes
Worn index plate
(wear part)
If there is a groove in the cam and/or the lifter point has
a flat spot, the lifter cannot raise the index pin high enough
inside the holder. The pin will drag across the index plate and
accelerate the wear by elongating the plate holes. The pin can
no longer engage in the holes.
Groove in cam
(wear part)
The lifter riding on the cam causes a groove in the cam.
Continued...
