Troubleshooting - Franklin Electric FTSP Serie Manual Del Propietário

(a) LUBRICATION:
1) The pump requires no lubrication.
2) For gasoline or diesel engines, refer to the instructions
provided by the engine manuafacturer.
(b) REPLACING SEALS:
To disassemble:
1) Remove four nuts and washers and dismount the front
casing.
2) Remove the volute.
3) Inspect the seal on the suction side of the volute. It
should be replaced if damaged.
4) Check 'O' Ring in the groove of the front casing. It should
be replaced if damaged.
5) Unscrew the impeller in a counter-clockwise direction.
6) Slip the rotating seal with the sleeve off of the engine
shaft.
7) Inspect the ceramic seat fi xed in the rear casing. If it is
worn or damaged, it should be replaced. Unbolt the rear
casing from the engine and push the ceramic seat out
of its housing in the rear casing from the engine end.
Care must be taken so that the shaft is not damaged in
the process.
To reassemble:
1) Clean all parts thoroughly before reassembly.
2) Oil the rubber cup on the ceramic seat and push it into
PROBLEM
No discharge
Reduced capacity and/or head
Pump loses prime
Excessive power consumption
Noise
MAINTENANCE
the rear casing groove using thumbs only. Make sure
that the smooth surface of the ceramic seat faces out-
wards.
3) Assemble the rear casing to the engine being very care-
ful so as not to damage the ceramic seat. Do not forget
the lock washers or washer seals when assembling the
rear casing to the engine.
4) Slide the rotating seal onto the sleeve and then slide
the sleeve onto the shaft.
5) Screw on the impeller.
6) Position the volute into the rear casing so that it seats
properly into the location diameter of the rear casing.
The volute is prevented from rotation by its anti-rota-
tion rib which seats into the slot on the side of the rear
casing. It may be necessary to tip the pump rearwards
to keep the volute in position until the front casing is in
position.
7) Slide the seal on the shoulder of the volute.
8) Place the 'O' Ring into the groove of the front casing.
9) Assemble the front casing with the rear casing.
CAUTION
• Whenever the pump is dismantled and then reassembled,
always check to see that the impeller rotates freely within
the volute.
• All models have a fl inger on the shaft. This fl inger must not
be removed.

TROUBLESHOOTING

Pump not properly primed.
Speed too low.
Suction lift greater than that for which the pump was designed.
Discharge too high.
Collapsed or plugged suction hose.
Air leaks in suction line.
Clogged impeller.
Strainer or foot valve not properly submerged.
Excessively worn impeller.
Speed too low.
Suction lift too great or insuffi cient NPSH. NPSH, Net Positive
Partially collapsed or plugged suction line.
Air leaks in suction line.
Excessive amount of air or gas in liquid.
Loose seal due to shrinkage or damage.
Suction pipe insuffi ciently submerged.
Suction lift too great.
Check if valve may be worn or have dirt lodged between the rubber.
Speed too high.
Specifi c gravity or viscosity of liquid too high.
Suction and discharge piping not properly supported and anchored.
Cavitation - check NPSH.
3
CAUSE