6. Thread the impeller on to the shaft
to push the seal components into
position.
NOTICE This kit includes two impel-
lers to accommodate two motors.
Determine which impeller is the cor-
rect one for your pump by threading
it onto the motor shaft (only one will
fit).
Reassembly
1. Replace the diffuser and the prim-
ing screen (see Step 4 and exploded
view, Fig. 8 ).
NOTICE When replacing the diffus-
er, make three .009” shims and place
them around the eye of the impeller
to center the impeller in the diffuser
and prevent binding. See “How to
Make and Install Impeller Shims”,
below.
2. The nozzle and venturi can be
removed and replaced with the
wrenches shown in Table 1, below.
The venturi on 3/4 and 1 HP shallow
well pumps screws into the pump
case. The venturi on 1/3 and 1/2
HP shallow well pumps threads into
the eye of the impeller (see Figure
6). The nozzle on all shallow well
pumps screws into the pump case.
The nozzle and venturi on deep well
pumps screw into the ejector hous-
ing (see exploded view, Figure 8).
NOTICE If used, this is important for
proper priming
DO NOT LEAVE THIS SCREEN OFF!
3. When replacing the nozzle and
venturi, BE SURE that you do not
cross thread anything. Be sure that
the nozzle and venturi are both tight
against their respective shoulders; if
the nozzle is not screwed down as
far as possible, the venturi entrance
will block the flow through the
pump.
4. Install the pump case and o-ring.
Replace the pump case bolts and
base bolts. Reinstall the pressure
tube.
5. Refill the pump body with water.
6. Connect the power and test the
pump. There should be no rubbing
or scraping noises from the pump
and no leaks. To avoid ruining the
new seal, DO NOT RUN THE PUMP
DRY.
California Proposition 65 Warning
This product contains
chemicals known to the State of
California to cause cancer or birth defects
or other reproductive harm.
2
A. Cut the length of a sheet of paper (8.5” x 11”) into three
1-1/2” strips.
B. Paper is about .003” thick, so one strip (folded into thirds)
makes one shim.
C. With the impeller already installed, install the diffuser but
only start the bolts, so that the diffuser is loose on the seal
plate.
D. Take one shim and insert it at the bottom (6 o’clock) of
the eye of the diffuser. Be sure that it slides in between the
impeller and the diffuser.
E. Take the 2nd shim, lift the diffuser to get clearance, and
insert the shim at about 10 o’clock. Repeat at 2 o’clock
(the 3rd shim).
F. Tighten the diffuser bolts.
G. Remove the shims. To check that the impeller is free, put
a finger in the eye of the impeller and rotate it. It should
turn without binding.
H. Install the pump case and O-Ring.
How to Make and Install Impeller Shims
6159 0210
Figure 6: Hold the motor shaft with a
7/16” end wrench and thread the impeller
onto the shaft.
Figure 7: (1/3 and 1/2 HP Shallow Well
Pumps): Hold the motor shaft and thread the
venturi tube into the eye of the impeller.
6160 0210
Table 1: Nozzle and Venturi Removal / Replacement
Socket Wrench Needed
HP
Nozzle
Venturi
1/3
1-1/4”
1/2
1-1/4”
3/4
9/16” w/Extension
27/32”
1
9/16” w/Extension
27/32”
Ceramic
Face
Carbon
Face
Be Careful
That Motor
Shaft Shoulder...
...Does Not
Damage Seal Face
6138 1209
Figure 5: Take care when installing a new
seal!
EXAMPLE:
