7 Troubleshooting
7.1 Troubleshooting Guide
NOTICE:
Should pump be handling a harmful liquid, make sure necessary safety precautions are under-
taken before implementing any recommended action in the accompanying Trouble Guide. The
following are some common causes of problems that may arise:
Table 2: Trouble Guide
Symptoms
Probable Cause
Recommended Action
Will not prime.
1.
No liquid in pump casing.
2.
Loose suction inlet (50)
and/or suction check valve
cover plate (76).
3.
Worn suction inlet gasket
(49) and/or cover plate gas-
ket (77).
4.
Loose suction chamber drain
plug (2).
5.
Worn pump shaft seal assy.
(17).
6.
Loose clean-out cover (83)
and/or worn clean-out gasket
(84).
7.
Air release line clogged.
1.
Fill pump casing with liquid
being pumped.
2.
Tighten bolts (57).
3.
Replace with new gaskets.
4.
Tighten plug, use pipe dope
or PTFE Tape.
5.
Install new seal.
6.
Replace with new gasket and
tighten hand-knobs (81).
7.
Clean air release line.
Suddenly stops pumping.
Clogged suction line or suction strain-
er (if used).
Clean suction line & strainer.
Stops pumping until motor is stopped
and re-started.
Collapsing suction hose lining.
Replace suction line & strainer.
Slowly stops pumping.
1.
Clogged impeller, volute,
suction line or check valve.
2.
Loose clean-out cover (83).
1.
Clean-out debris from impel-
ler eye area, suction check
valve. (Follow instructions on
other pages)
2.
Clean sealing surface & "O"
ring gasket and tighten hand
knobs.
Excessive leakage (oil+ liquid being
pumped) thru seal cavity vented hole.
Worn pump shaft seal (17).
Replace seal (follow instructions on
other page).
Will not hold prime.
1.
Dislodged or worn check
valve (51).
2.
Loose clean out cover (83).
3.
Loose check valve cover
plate (76).
1.
Clean or replace check valve
- clean sealing surface.
2.
Check gasket (84), replace if
necessary. Tighten cover
plate.
3.
Check gasket (77). Replace
if necessary. Tighten cover
plate screws.
Poor Performance.
1.
Worn impeller, seal or wear
plate (89).
2.
Motor not up to speed:
•
low voltage
1.
Install new impeller, seal or
wear plate.
2.
•
Larger lead wires
req'd.
7 Troubleshooting
Model Trash Hog II Installation, Operation, and Maintenance Manual
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