|
CAUSE OF
TROUBLE |
HOW TO
CHECK |
HOW TO
CORRECT |
|
1. Pump may be
air locked. |
Stop and
start pump several times, waiting between cycles. If pump resumes normal
delivery air lock was trouble. |
If this test
fails to correct the trouble, proceed as below. |
|
2. Water level
in well too low. |
Well
production may be too low for pump capacity. Restrict flow of pump output,
wait for well to recover, and start pump. |
If partial
restriction corrects trouble, leave valve or cock at restricted setting.
Otherwise, lower pump in well if depth is sufficient. Do not lower if sand
clogging might occur. |
|
3. Discharge
line check valve installed backward. |
Examine check
valve on discharge line to make sure arrow indicating direction of flow
points in right direction. |
Reverse valve
is necessary. |
|
4. Leak in drop
pipe. |
Raise pipe
and examine for leaks. |
Replace
damaged section of drop pipe. |
|
5. Pump check
valve jammed by drop pipe. |
When pump is
pulled after completing “4” above, examine drop pipe connection to pump
outlet. If threaded section of drop pipe has been screwed in too far, it
may be jamming the check valve in the closed position. |
Unscrew drop
pipe and cut off portion of threads. |
|
6. Pump intake
screen blocked. |
The intake
screen on the pump may be blocked by sand or mud. Examine. |
Clean screen.
Make sure pump is reinstalled several feet above well bottom, preferably
10 feet or more. |
|
7. Pump parts
worn. |
Presence of
abrasives in water may result in excessive wear on impeller, casing and
other close-clearance parts. Before pulling pump reduce setting on
pressure switch to see if pump shuts off. If it does, check for worn
parts. |
Pull pump and
replace worn components. |
|
8. Motor shaft
loose. |
Coupling
between motor and pump shaft may have worked loose. Inspect after pulling
pump and looking for worn components as in “7” above. |
Tighten all
connections, set screws, etc. |