Sears 390.2521 - Manual (Page 10)

MAINTENANCE / HELPFUL HINTS
B. Wet outer edge of “O" Ring with detergent solution.
C. With finger pressure press seat firmly and squarely
into cavity. See Figure 9A. Polished face of seat faces
inside of pump. If seat wiU not locate properly, place
cardboard washer over polished face and use piece of
3/4" standard pipe for pressing purposes. See Figtire
9B.
Figure 9A Figure 9B
D. Dispose of cardboard washer and clean surface of
seat.
E. Clean motor shaft.
F. Reassemble back half of pump to motor.
G. Apply detergent solution to inside diameter of rotat­
ing seal member.
H. Slide rotating member on shaft until rubber drive ring
hits shaft shoulder. NOTICE: BE SURE you do not chip
or scratch seal face on shaft shoulder or seal will leak!
I. Screw impeller on shaft (clockwise) while holding
shaft with 7/16" open end wrench on shaft flats. This
will automatically locate seal in place. See Figure 10.
Figure 10
J. Remount diffuser on seal plate.
Cleaning Impeller
1. Follow steps lA through IE under “Disassembly and
Assembly of Pump" on Page 8.
2. Remove diffuser and impeller from pump per instruc­
tions under “Removing Motor for Service and Replacing
Shaft Seal” on Page 9.
3. Clean impeller and reassemble impeller and diffuser per
instructions under “Removing Motor for Service and
Replacing Shaft Seal” on Pages 9 and 10.
Cleaning Shallow Well Jet
To remove debris from venturi or nozzle, proceed as follows:
1. Disassemble pump per instructions on Page 9.
2. Turn venturi counterclockwise and remove it. The noz­
zle is now exposed. Remove it using a 5/8" hex socket
wrench with extension. Turn counterclockwise. If
socket wrench is not available, insert an ice pick or sim­
ilar pointed tool carefuUy into the nozzle. This will dis­
lodge debris.
3. Flush out the debris by running water through the nozzle
in the same direction as the dislodging tool was inserted.
4. Reinstall nozzle and venturi. Do not overtighten!
5. Reassemble pump per instructions on Page 9.
How to Handle a Gaseous Well
In some areas well water contains gases which must be al­
lowed to escape before the water is used. This can be done
as shown in Figure 11.
A good way of delivering gas-free water is to suspend a pipe,
closed at the bottom and open at the top, surrounding the
suction pipe. Since the gases rise in the well casing, the
water sucked down through the pipe and into the suction
pipe is free of gas. This type of well must be vented to the
outside of any enclosure.
Figure I I
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