Sears 390.2518 - Manual (Page 9)

SERVICE
C. With finger pressure press scat firmly and squarely into cav­
ity. See Figure 12A. Polished face of seat faces inside of pump.
If seat ■ will not locate properly, place cardboard washer over
polished face and use piece of 3/4' standard pipe for press­
ing purposes. See Figure 12B.
Figure I2A 477 0194
Figure I2B
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 rotating 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. Sec Figure 13.
478 0194
V r r
Figure 13
J. Reposition capacitor and replace motor canopy.
K. 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 instructions under
“Removing Motor for Service and Replacing Shaft Seal” on
Page 8.
3. Clean impeller and reassemble impeller and diffuser per in­
structions under “Removing Motor for Service and Replacing
Shaft Seal" on pages 8 and 9.
Cleaning Shallo'w Well Jet
To remove debris from venturi or nozzle, proceed as follows;
1. Disassemble pump per instructions on Page 8.
2. Turn venturi counterclockwise and remove it. The nozzle is
now exposed. Remove it using a 5/8" hex socket wrench with
extension. Turn counterclockwise. If socket wrench is not avail­
able, insert an ice pick or similar pointed tool carefully into the
nozzle. This wiU dislodge 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 f>cr instructions on Page 8.
HELPFUL HINTS
How to Handle a Gaseotis Well
In some areas well water contains gases which must be allowed to
escape before the water is used. This can be done as shown in
Figure 14.
G qbb «
rise to
surface
Figure 14
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 pip>e is free of gas. This type
of well must be vented to the outside of any enclosure.
Air Control in Flowing Wells
Flowing wells, or weUs with little or no drawdown, could create a
special problem in air control in the operation of your water s)'Stem,
In such cases, install a Captive Air® Tank. It does not require any
air control.