Maintenance
8
3. Fill pump and suction pipe with water.
4. Replace priming plug, using Teflon tape on thread; tighten plug.
NOTICE:
If a priming tee and plug have been provided for a long hori-
zontal run, be sure to fill suction pipe through this tee and replace
plug. (Don’t forget to Teflon tape the plug.)
5. Start pump: water should be produced in 10 minutes or less, the time
depending on depth to water (not more than 20') and length of hori-
zontal run (10' of horizontal suction pipe = 1' of vertical lift due to
friction losses in the pipe).
If no water is produced within 10 minutes, stop pump, release all pres-
sure, remove priming plug, refill and try again.
Hazardous pressure and risk of explosion and scalding. If
pump is run continuously at no flow (that is, with discharge shut off or
without priming), water may boil in pump and piping system. Under
steam pressure, pipes may rupture, blow off of fittings or blow out of
pump ports and scald anyone near.
To prevent explosion, do the following:
A. Be sure discharge (valve, pistol grip hose nozzle, etc.) is open whenev-
er pump is running.
B. If pump fails to produce water when attempting to prime, release all
pressure, drain pump and refill with cold water after every two attempts.
C. When priming, monitor pump and piping temperature. If pump or pip-
ing begin to feel warm to the touch, shut off pump and allow system to
cool off. Release all pressure in system and refill pump and piping with
cold water.
Pump and piping need not be disconnected to repair or replace motor or
seal (see Figure 13). If motor is replaced, replace the shaft seal (Key No. 5,
Page 12). Keep one on hand for future use.
Be sure to prime pump before starting.
NOTICE:
Check motor label for lubrication instructions. The mechanical
shaft seal in the pump is water lubricated and self-adjusting.
NOTICE:
Drain pump when disconnecting from service or when it might
freeze.
PUMP DISASSEMBLY
1. Disconnect power to motor.
NOTICE:
Mark wires for correct assembly.
2. Remove capscrews holding seal plate to pump body. Motor assembly
and seal plate can now be pulled away from pump body (Figure 13).
CAREFULLY remove gasket.
CLEANING/REPLACING IMPELLER
NOTICE:
First, follow instructions under “Pump Disassembly”.
1. Remove screws fastening diffuser to seal plate; remove diffuser (see
Figure 14). Exposed impeller can now be cleaned.
2. If impeller must be replaced, loosen two machine screws and remove
motor canopy (see Figure 15).
3.
Capacitor voltage may be hazardous.
To discharge capac-
itor, hold insulated handle screwdriver
BY THE HANDLE
and short
capacitor terminals together (see Figure 15). Do not touch metal screw-
driver blade or capacitor terminals. If in doubt, consult a qualified
electrician.
ON
OFF
1060B 0997
Figure 12: Disconnect Power
20
100
8
60
40
3027 0997 DS3
Figure 13: Slide Motor Back
3028 0997
Figure 14: Remove Diffuser
Figure 15: Hold Shaft
To avoid electrical
shock hazard, use
insulated-handle
screwdriver to
short capacitor
terminals
as shown.