Tuttnauer 2301006, Operation & Maintenance Manual

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Page 91 of 117 pages
11.9 Water Pump Rear Endbell Replacement Kit
WARNING:
To prevent electrical shock, disconnect power before initiating any work. In the case
of pump failure, the motor housing and/or the pumped fluid may carry high voltage
to components normally considered safe.
CAUTION:
If the fluid being pumped is harmful, caustic, or hazardous take all necessary
precautions to prevent equipment damage or personal injury. When the procedure
outlined below is performed, the fluid side of the pump-head is not opened;
however, relieving pressure within the outlet side of the pump is highly
recommended.
Inspect the motor armature/commutator for any indication of the following
conditions.
Check the commutator brush contact surface for deep wear, scores, filled/shorted
slots, or a burnt condition. Minimum commutator diameter is .850 in. [21.5 mm]
(115 & 23OVAC). Check armature windings
for open, shorts, internal ground, and
commutator connections. The windings should not be overheated, black in color,
or have a burnt odor.
If the motor has any indication of the aforementioned or other failure modes, the
endbell kit will not correct the failed condition. Complete motor assemblies.
Contact Tuttnauer for a complete motor assembly.
11.9.1 Replacement Instructions
1. Mark the motor housing to index the location of endbell wires to the housing.
NOTE:
If the endbell is improperly indexed to the motor housing (180°) the motor will
rotate in the opposite direction.
2. Remove the two motor assembly screws using a 5/16” socket wrench or nut
driver.
3. Remove the rear endbell assembly. Inspect for signs of excessive wear on the
commutator and/or armature. Ensure the proper placement of washers on the
shaft as shown.
4. Slide the new endbell assembly onto the shaft as far as the brush retention clip
will permit.