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Replacing Components
Replacing the Pump Head Removal
1.
Disconnect or TURN OFF the power supply.
2.
Close any isolation valves on either side ofthe pump to avoid draining the
system of liquid.
3.
Disconnect the electrical leads from the terminal box.
4.
Disconnect and remove the conduit from the terminal box.
5.
Loosen and remove the four allen screws (8 or 10 mm) which connect the
pump head housing to the pump housing.
6.
Remove the pump head from the pump housing.
7.
Clean the machined surfaces in the pump housing of any foreign material.
Pump Housing
Thrust Bearing
Bearing Plate
Impeller/Rotor
Assembly
o
Fig. 21
Terminal
Box
[]:::;::l...
[JI::::;:::l
.
Pump Head
O-Ring
Housing
Installation
1.
Carefully remove the new pump head assembly from its packaging.
Separate the impeller/rotor assembly from the new pump head.
2.
While holding the thrust bearing, carefully place the impeller/rotor assem-
bly into the pump housing. The bearing plate should fit snugly into the
lowest machined surface in the pump housing.
3.
Make sure that the impeller/rotor assembly can rotate freely.
4.
Place the a-Ring over the rotor and locate it into the inner diameter of the
pump housing.
5.
Carefully place the pumphead housing over the rotor and rotate it so the
terminal box is in the position you wish (see page
3
for positioning).
6.
Make sure the pump head housing is properly seated on the pump
housing. Do not force the two together -- ifthere is binding, disassemble
them and repeat steps 2-6. Tighten the allen screws evenly to secure the
pump head. Torque to:
8mm
15 ft
Ibs
10mm
25
ft Ibs
7.
Check to make sure the motor shaft turns freely, as explained in step 5 on
page 3 (under "Rotating the Terminal Box").
Page 16
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