Specifications Information and Repair Parts Manual
5150-96
5150-254-00
3
11/2012
High Flow Drum Pump
Troubleshooting Chart
Symptom
Possible Cause(s)
Corrective Action
Pump does not prime
1.
Suction line above liquid
1.
Ensure that open end of suction line remains com-
pletely below surface of liquid.
NOTE:
For stubborn liquids, try filling pump
through discharge port before operation.
A filled casing primes quickly.
2.
Pump speed too slow
2.
Operate pump handle rapidly until pump primes (up
to 30 cycles).
3.
*Unsuitable suction line
3.
Pumps are intended for use with suction line sup-
plied. Longer or collapsible suction line may prohibit
priming. Use short length rigid line similar in diam-
eter to suction port. (Maximum pump height above
liquid 36”).
4.
Clogged suction line and/or filter
4.
Clean suction line and/or filter (where applicable).
5.
Suction line air leakage
5.
Verify that all suction line connections are sealed
tightly. Use Teflon® tape or appropriate sealant, if
necessary.
6.
Cover air leakage
6.
Inspect pump cover(s) for looseness and damaged
or slipped gaskets. Replace damaged gaskets and
snug-up cover(s).
7.
Shaft air leakage
7.
Verify shaft seal is properly seated and in good con-
dition. Replace seal if worn or damaged.
8.
Housing air leakage
8.
Inspect entire pump housing, cover(s) and shaft for
cracks. Replace damaged parts.
9.
r
Shifted or worn rotor
9.
Loosen all cover bolts. View pump from side with
suction/discharge ports in vertical position and on
right hand side. Reposition rotor by grasping cov-
ers and sliding towards 3 o’clock position. Do not
use excessive force. Hold in position and re-tighten
cover bolts.
10. Damaged/worn pump parts
10. Remove pump cover and inspect for broken pieces.
Components should have smooth finish, no large
grooves or voids. Replace damaged parts. Piston
type pumps may include a poppet valve, which is
designed to prevent back-flow. If excessive leakage
past valve is found, replace valve (some leakage is
normal).
Handle difficult or impossible to move
1.
Pump has not been used for some time
1.
Remove pump cover and inspect for crystallized, so-
lidified or gummy remains. Clean parts. To prevent
future occurrences, flush pump with appropriate sol
-
vent after pumping problem liquid.
2.
Damaged/worn pump parts
2.
Remove pump cover and inspect internal parts.
Components should have smooth finish, no large
grooves or voids. Replace damaged parts.
3.
Corroded pump parts
3.
Remove pump cover and inspect for corrosion.
Clean parts and use pump only for liquids, which are
compatible with pump component materials.
4.
†Damaged/worn gear drive parts
4.
a) Remove oil plug from gear case and verify oil
level is correct, top-up, if necessary. See “Mainte-
nance” for proper lubricant.
b) If pump is still difficult to turn, drain gear oil and
inspect oil for contaminants indicating damaged
gears. Replace damaged parts.
Insufficient flow
1.
Clogged, collapsed or undersized filter, suc
-
tion and/or discharge line
1.
Pumps are intended for use with supplied rigid line
and filter (where applicable). Verify line and filter are
clean, not pinched closed, and of similar size of port
connection
2.
Also see above “Pump does not prime”
2.
Check and repair, as necessary.
(*) For pumps supplied without suction/discharge lines, see “Description” for appropriate line.
(
r
) Applies only to vane (not lobe or piston) type pumps.
(†) Applies only to lobe (not vane or piston) type pumps, which use a gear drive unit.