MAINTENANCE
NOTICE:
Do not overtighten; you may twist studs
off of tank. If you have a torque wrench, tighten to
85 inch-pounds torque.
18. Stand tank on feet and reconnect piping.
19. Recharge tank to proper air pressure (see Page 5).
20. Reconnect hoses and pressure switch tube; prime
pump (see Page 6).
Air Valve Replacement
1. Follow steps 1 through 5 under “Vinyl Bag
Replacement”, Page 7.
2. Cut valve off as close to tank as possible. Push re-
maining portion back into tank.
3. Tip tank on end and BE SURE all water is drained
from bag.
4. Carefully remove bag ring from lip on tank opening
and push bag ring back into tank; reach in around
it and remove cut off portion of valve from tank.
5. Wipe a thin film of soapy solution on replacement
valve and from inside tank insert in hole in top of
tank.
6. Pull valve through hole with pliers or a valve tool
(available at your local filling station or Automotive
Center).
7. Follow steps 14 through 20 under “Vinyl Bag Re-
moval”, Page 7, to reinstall bag in tank.
Testing for Bag Leakage
1. Follow steps 1 through 4 under “Vinyl Bag
Replacement”, Page 7.
2. Tip tank on end, valve down. Be careful not to
break valve!
3. If bag leaks, water will run out of valve. If so, re-
place bag as instructed above.
DISASSEMBLY AND
ASSEMBLY OF PUMP
Risk of electrical shock.
Be sure unit is
grounded and power disconnected before attempting any
work on pump or motor.
Your SEARS pump is designed for ease in servicing. Should
repair or replacement of the motor or seal be needed, the
pump and piping do not need to be disconnected or dis-
turbed.
1. Disassemble pump as follows:
A. Disconnect power.
B. Remove pressure switch tube from pump body and
allow pump to drain.
C. Remove four hexnuts and lockwashers (Key Nos. 24
and 23, Page 12) which hold the pump body to the
motor.
D. Remove motor, seal plate, impeller, rubber pad and
diffuser (Key Nos. 1, 3, 7, 8 and 9, Page 12) as a unit.
You may have to pry gently with two screwdrivers be-
tween the motor flange and the pump body to sepa-
rate pump and motor.
2. Reassembly of pump:
A. Install O-Ring gasket on seal plate (Key Nos. 5 and 3,
Page 12).
B. Pick up a
small
amount of petroleum jelly on one fin-
ger and spread evenly over seal plate and venturi O-
Ring gasket for lubrication during reassembly.
Be
careful
not to nick or tear O-Ring.
C. Replace motor onto pump body; be sure rubber pad
(Key No. 8, Page 12) stays in place on top of diffuser.
Remount base on lower studs. Tighten four hexnuts
and lockwashers snugly (35-45 inch-lbs. torque).
Do
not overtighten.
D. Replace pressure switch tubing and motor wiring.
E. Prime pump according to instructions above.
F. Check for leaks.
Removing Motor for Service
and Replacing Shaft Seal
If it is necessary to separate motor and seal plate, always re-
place the shaft seal. We suggest you purchase this item,
Stock No. 2784, and have it on hand for future use.
NOTICE:
The seal consists of two parts, a rotating member
and a ceramic seat. The surfaces of the seal are easily dam-
aged. Read instructions carefully.
Remove motor as follows:
1. Disassemble pump per instructions above.
2. Remove diffuser and impeller as follows (Key Nos. 9 and
7, Page 12).
A. Remove screws holding diffuser.
B. Loosen two screws and remove motor canopy from
motor (Key No. 1, Page 12).
C. Place 7/16” open end wrench on motor shaft flat.
D. Turn impeller counterclockwise when facing it.
8
