TM5-3820-256-10
Table 3-13. Pump Runs, But Delivers Little or No Water (Cont'd.)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5.
LEAK IN THE
Although water is being
Raise pipe; check for leak; re-
DROP PIPE.
supplied to tank, the
place any damaged pipe.
pump may not deliver
enough pressure to shut
off the system; the "ON"
portion of the cycle in-
creases.
6.
PUMP SCREEN
Restricted flow may in-
Clean screen and reset at a lesser
BLOCKED.
dicate a clogged intake
depth. It may be necessary to
screen on the pump.
bail out sand and mud in the
Pump may be installed
well.
in the mud or sand.
7.
PUMP WORN OUT.
Check for symptoms
Contact direct support mainte-
similar to those of a
nance.
leak in the drop pipe or
low water level in the
well; check for sand in
tank. Reduce the pres-
sure switch setting; if
pump shuts off, parts
maybe worn.
8.
LOOSE OR BRO
No water is delivered if
Check for damaged shafts if
KEN MOTOR SHAFT.
coupling between motor
coupling is loose and replace worn
and pump shaft is loose
or defective units.
or if a jammed pump has
caused the motor shaft
to sheer off.
Table 3-14. Pump Continues Running; Will not Cycle.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
PRESSURE SWITCH.
Switch points may be
Contact direct support mainte-
"welded" in closed posi-
nance.
tion.
2.
LOW WATER LEVEL
Pump's capacity may ex-
Throttle the pump output or re-
IN THE WELL.
ceed well's capacity to
set the pump to a lower level.
produce water; shut off
Do not lower if sand may clog
the pump and allow the
the pump.
well to recover ample
water level. Check sta-
tic level from the well
head.
3.
LEAK IN THE
Check pipe for leaks.
Contact unit level maintenance.
SYSTEM.
3-60