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Page 10SKU 98135 For technical questions, please call 1-800-444-3353.
Troubleshooting
Problem Possible Causes Likely Solutions
Pump will not
prime
Suction Pipe (58) leak.1.
Bypass Valve (28) open.2.
Vanes (33) sticking. 3.
Inlet Gasket (26) leakage.4.
Excessive Rotor (34) or Vane 5.
(33) wear.
Motor not operating. 6.
Motor is running backwards.7.
Check for leaks in Suction Pipe (58).1.
Remove and inspect Bypass Valve (28).2.
Check Vanes (33) and slots for nicks, burrs, 3.
wear, and accumulation.
Check and tighten all covers and joints.4.
Check Rotor (34) and Vanes (33) for 5.
excessive wear or possible damage.
Motor Rotor (34) should turn clockwise 6.
at Pump end; if not, have it repaired by a
Check all wiring for correct polarity.7.
Pump hums but
will not operate
Dirt in Pump cavity.1.
Motor failure.2.
Clean out Pump cavity.1.
Motor bearing(s) (2) possibly frozen. Have 2.
Low Capacity Excessive dirt in Screen (25).1.
Suction Pipe (58) Problem. 2.
Bypass Valve (28) sticking.3.
Vanes (33) sticking.4.
Excessive Rotor (34) or Vane 5.
(33) wear.
Hose (55) damage.6.
Remove and clean Screen (25).1.
Check Suction Pipe (58) for leaks or 2.
restrictions.
Remove and inspect Bypass Valve (28)3.
Check Vanes (33) and slots for wear or 4.
deposits.
Check Rotor (34 and Vanes (33) for 5.
excessive wear or damage.
Replace Hose (55)6. (DO NOT REPAIR)
Pump runs slowly Incorrect voltage.1.
Vanes (33) sticking.2.
Wiring problem. 3.
Motor Casting Assembly (6) 4.
out of line.
Brush problem. 5.
Motor problem. 6.
Motor failure. 7.
Check incoming line voltage.1.
Check Vanes (33) and slots for wear.2.
Check for loose or broken wiring and replace 3.
if damage is found.
Motor frame must be installed with punch 4.
mark in line with notch in Motor Casting
Assembly (6).
Check Brushes for excessive wear and 5.
adequate spring tension. Have repaired or
Inspect armature and commutator and repair 6.
or replace if necessary. Have work done by
Motor bearing(s) (2) failing. Have repaired 7.
Follow all safety precautions whenever diagnosing or servicing the pump.
Disconnect power supply before service by qualied technician only.