Stenner Pumps 85M5 - TROUBLESHOOTING - FEED RATE CONTROL; DIAL RING WILL NOT TURN; PUMP HEAD DOES NOT ROTATE

Classic Series www.stenner.com
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TROUBLESHOOTING – FEED RATE CONTROL
PROBLEM POSSIBLE CAUSE SOLUTION
Dial ring will not turn Seized or broken variable cam Apply Aquashield
™
to variable cam &
cam slot in feed rate control housing
Seized dial ring Clean then lubricate dial ring & cam slot
with AquaShield
™
Dial ring turns, Variable cam disengaged from Re-insert 90˚ end into ring
output doesn’t change dial ring
Broken variable cam Replace variable cam
Pump head does not rotate Worn index plate Turn over or replace index plate
Motor problem Refer to Motor section
Pump head roller assembly stripped Replace roller assembly
Index pin holder loose Tighten holder into spider assembly
Index pin broken Replace index pin and lifter assembly
Pump head rotates continuously Variable cam out of place or worn Replace or re-insert variable cam
Ratcheting sound Index plate worn Turn over or replace index plate
Variable cam worn Replace variable cam
Lifter worn Replace lifter or complete spider assembly