Craftsman 390.262454 - Manual (Page 8)

MAINTENANCE
Pump and piping need not be disconnected to repair or re­
place motor or seal (see Figure 12). If motor is replaced, re­
place the shaft seal (Key No. 6, Page 11). 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.
Figure I I - Disconnect Power
2. Remove clamp (see Figure 12).
3. Remove pump base mounting bolts. Motor assembly and
back half of pump can now be pulled away from pump
front half (Figure 12). CAREFULLY remove O-Rlng.
Figure 12 - Slide Motor Back
CLEANING/REPLACING IMPELLER
NOTICE: First, follow instructions under “Pump Disas­
sembly”.
1. Remove four screws fastening diffuser to seal plate; re­
move diffuser (see Figure 13). Exposed Impeller can now
be cleaned.
2. If impeller must be replaced, loosen two machine screws
and remove motor eanopy (see Figure 14).
To avoid electrical
shock hazard, use
insulated-handle
screvitdriver to short
capacitor terminals
as shown.
Figure 14 - Hold Shaft
3.
4.
5.
6
.
7.
A WARNING Capacitor voltage may be hazardous.
To discharge capacitor, hold insulated handle screw­
driver BY THE HANDLE and short capacitor terminals
together (see Figure 14). Do not touch metal screwdriver
blade or capacitor terminals. If in doubt, consult a quali­
fied electrician.
Unscrew capacitor clamp and remove capacitor. Do not
discormect capacitor wires to motor.
Slide 7/16” open end wrench in behind spring loaded
switch on motor end of shaft; hold motor shaft with
wrench on shaft flats and unscrew impeller by turning
counterclockwise when looking into eye of impeller.
To reinstall, reverse steps 1 through 5.
See directions under “Pump Reassembly,” Page 10.
REMOVING OLD SEAL
Follow instructions under “Pump Disassembly”.
Follow steps 2 through 5 under “Cleaning/Replacing
Impeller.
Unscrew four nuts holding pump back half to motor.
Remove rotating half of seal by placing two screwdrivers
under back half of pump body and carefully prying up
(Figure 15). Back half of pump body will slide off shaft,
bringing seal with it.
Figure 15 - Remove Seal plate
NOTICE: Be sure you do not scratch or mar shaft; if shaft is
marred, it must be dressed smooth with line emery or cro­
cus cloth before installing new seal. DO NOT reduce shaft
diameter!
Figure 13 - Remove Diffiiser