Watts T55-85MHP40 - Manual (Page 28)

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Feed Rate Control
Adjustment ring will not turn. Variable cam has seized. Grease variable cam and cam slot.
Adjustment ring has seized. Clean and lubricate ring.
Adjustment ring turns, output doesn’t change. Variable cam has disengaged from ring. Re-insert 90˚ end into ring.
Variable cam is broken. Replace variable cam.
Pump head is not rotating. Index plate is worn. Turn over or replace index plate.
Problem with the gear motor. Refer to Motor Section.
Pump head roller assembly is stripped. Replace roller assembly.
Index pin holder backed out of
spider assembly.
Tighten holder into spider assembly.
Index pin is broken. Replace index pin and lifter assembly.
Pump head rotates continuously. Variable cam is installed incorrectly. Replace or re-insert variable cam.
Indexing is erratic. Index plate is worn. Turn over or replace index plate.
Variable cam is worn. Replace variable cam.
Lifter is worn. Replace index pin and lifter assembly.
PROBLEM POSSIBLE CAUSE SOLUTION
Troubleshooting
continued
– feed rate control