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WARNING - RISK OF ELECTRICAL SHOCK
Before servicing motor operated equipment, shut off the power
at the main electrical panel and disconnect the power supply
from motor and accessories. Use safe working practices during
servicing of equipment.
a)
Lubrication: The pump requires none. Refer to motor manufac-
turer's instructions.
b)
Replacing Mechanical Seal: (See Fig. 4)
Only duly qualified persons should perform maintenance
on electrical and/or mechanical devices.
Disassembly:
1)
Shut off the power to the pump at the main sevice panel.
2)
Open a tap in the water system to release the pressure.
3)
Remove the drain (12) and prime plugs to allow the
pump to drain.
4)
Disconnect the tube leading to the pressure switch.
5)
Remove the 4 bolts (1) and remove casing (2).
6)
Pry the diffuser (4) out of the casing using two slotted screw-
drivers for leverage.
7)
Remove cap (5) and insert a screwdriver to prevent the
shaft from turning while unscrewing the impeller (6)(GE
motors). If the impeller cannot be turned by hand, insert a
flat object into the impeller vane.
8)
Slip the rotating seal (7) off the shaft and remove the
seal plate (8).
9)
Remove the ceramic seal seat (9) from the seal plate.
a)
Motor will not start:
1)
No power to pressure switch due to blown fuses, open
switches or loose connections.
2)
Pump pressure switch not closed.
b)
Pump fails to deliver water:
1)
Pump not completely primed.
2)
Suction lift is too great.
3)
Foot valve is not submerged, buried in mud or plugged.
4)
Restrictor valve is fully closed.
c)
Pump loses prime:
1)
Air leaks in suction line.
2)
Well draws down too far and requires a tailpipe.
3)
Faulty foot valve.
MAINTENANCE
Reassembly:
1)
Clean all the parts thoroughly before assembling.
2)
Lightly lubricate (soapy water) the rubber cap on the ceramic
seal (9) and push it into the seal plate using thumbs only.
Make sure the smooth surface of the ceramic seat faces
outwards.
NOTE: If the pump will remain out of service for longer than
one week, the seal components must be installed dry (no
lubrication).
3)
Put the seal plate back on the motor.
4)
Lubricate the rotating seal (7) (soapy water) and slip it onto
the shaft with the 'carbon' ring towards the ceramic seat.
5)
Replace the impeller (6) and the diffuser (4).
6)
Replace the casing (2) making sure the gasket is not dam-
aged and is in place.
7)
Reconnect the tubes to the casing and to the pressure
switch.
8)
Reconnect the power.
9)
Prime pump, start, check for leaks.
TROUBLESHOOTING
d)
Pump delivers water but not at rated capacity:
1)
Leaks in suction or discharge line.
2)
Foot valve, suction line, impeller or nozzle are partially
plugged.
3)
Suction lift is greater than recommended.
4)
Improper setting of control valve on deep well units.
5)
Improper impeller rotation or low speed.
6)
Motor is wired for improper voltage.
7)
Low line voltage at motor.
e)
Pump starts and stops too often:
1)
Air leak in tank above the water level.
2)
Incorrect setting on pressure switch.
3)
Tank is water logged or incorrectly charged.
4)
Foot valve leaks or is stuck open.
5
2
7
1
9
12
6
4
8
Fig. 4
5
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