Gorman-Rupp Pumps S4A1-E25 460/3 1396155 and up - Manual (Page 38)

S SERIES PUMPS OM-06098
MAINTENANCE AND REPAIR PAGE E - 12
Apply `Never‐Seez' or equivalent compound to the
threads of the capscrews (5). Install the hardware
(5, 6 and 7) and torque evenly in a cross sequence
to 60 ft. lbs. (720 in. lbs. or 8,3 m. kg.).
Strainer Screen And Base Plate Installation
(Figure E-1)
Inspect the strainer screen (55) and base plate (56)
for cracks, distortion or erosion, and replace it if de­
fective.
Carefully position the strainer screen on the strain­
er plate (53) so that it seats against the strainer
plate shoulder. Install the base plate over the
screen, aligning the bolt holes. Secure the com­
plete strainer assembly using the hardware (57, 58
and 59). Make certain that the strainer seats prop­
erly against the shoulder of the strainer plate.
See FINAL ASSEMBLY and VACUUM TESTING
followed by LUBRICATION before putting the
pump back into service.
MOTOR DISASSEMBLY
Disassembly of the motor is rarely required except
to replace the motor rotor, stator or bearings. Do
not disassemble the motor unless it is necessary
and a clean, well‐equipped shop is available.
NOTE
It is recommended that a pump with a defective mo­
tor be returned to Gorman‐Rupp, or to one of the
Gorman‐Rupp authorized Submersible Repair
Centers.
The electrical power used to operate
this pump is high enough to cause inju­
ry or death. Make certain that the control
handle on the control box is in the off po­
sition and locked out, or that the power
supply to the control box has been
otherwise cut off and locked out, before
attempting to open or service the pump
assembly. Tag electrical circuits to pre­
vent accidental start‐up.
Carefully inspect any O‐rings or gaskets before re­
moval and cleaning to determine if a proper seal
and compression existed prior to disassembly. If
sealing was faulty or questionable, the cause must
be determined and corrected before reassembly.
Replace any parts as required.
Terminal Housing And Power Cable
Removal And Disassembly
(Figure E-1)
Total disassembly of the terminal housing and
power cable (33) is not always required. Disassem­
ble and replace only the parts proven defective by
inspection or testing (see Electrical Testing in
TROUBLESHOOTING).
The terminal housing and power cable assembly
(33) may be serviced without disassembling the
motor housing or pump end or without draining the
oil from the motor cavity. However, the oil must be
drained before attempting to disassemble the mo­
tor housing and components.
Secure the pump in an upright position. Remove
the deform locknuts (37) securing the terminal
housing assembly (33) to the motor housing as­
sembly (16).
(Figure E-2)
Carefully raise the terminal housing (8) from the
motor housing until the terminals (14) are accessi­
ble. Loosen the allen head setscrews (15), and dis­
connect the motor leads from the terminal posts.
Separate the terminal housing and power cable
assembly (2) from the motor housing.
No further disassembly is required to test the stator
or power cable.
To disconnect the power cable (2), remove the nuts
(5) securing the terminal gland (1) to the terminal
housing (8). Slide the gland back along the power
cable. Oil the bushing (6) and terminal housing
bore and pull firmly on the cable. (Allow the oil to
leak in around the bushing by agitating the cable in
the bore.) After the bushing has been loosened,
the cable should pull out far enough to expose the
bushing. Apply oil on the cable jacket and slide the
bushing and washer (7) back along the cable.