Gorman-Rupp Pumps S8B1-E100 460/3 1432260 and up - Manual (Page 39)

OM-06259 S SERIES PUMPS
PAGE E - 13 MAINTENANCE AND REPAIR
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 (36) 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
(36) 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 deformed locknuts (38) securing the terminal
housing assembly to the motor housing assembly
(18).
(Figure E-2)
Carefully raise the terminal housing (16) from the
motor housing until the terminals (1) are accessi­
ble. Loosen the allen head setscrews (21), and dis­
connect the motor leads from the terminal posts.
Separate the terminal housing and power cable
assembly (13) from the motor housing.
No further disassembly is required to test the stator
or power cable.
To disconnect the power cable (13), remove the
nuts (14) securing the terminal gland (12) to the ter­
minal housing (16). Slide the gland back along the
power cable. Oil the bushing (8) and terminal hous­
ing 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 loos­
ened, the cable should pull out far enough to ex­
pose the bushing. Apply oil on the cable jacket and
slide the bushing back along the cable. Quite of­
ten, pressure exerted on the bushing will deform
the cable jacket. If such happens, additional oil
and effort will be required to remove the bushing.
NOTE
If the rubber bushing cannot be removed from the
terminal housing as indicated, it may be necessary
to cut the bushing into small pieces or cut the cable.
Push approximately 6 inches (152 mm) of the pow­
er cable into the terminal housing so that the termi­
nal plate (19) comes free of the terminal housing.
This should permit access to the power cable con­
nections in the terminal plate.
NOTE
Do not remove the heat shrink tubing from the pow­
er cable leads unless the power cable or terminals
require replacement. If replacement is required,
the connections between the power cable leads
and the terminals must be resealed with heat shrink
tubing before applying the silicone adhesive (see
Terminal Housing And Power Cable Reassemb­
ly).
To disconnect the power cable (13) from the termi­
nal housing, pull the terminal plate away from the
terminal housing. When shipped from the factory,
the connections between the power cable leads
and the terminal collars (2) were encapsulated in
heat‐shrink tubing (3) and bonded to the terminal
plate with silicone adhesive (not shown). (In ser­
vice, the adhesive may have been replaced by pot­
ting compound during previous repair.) If damage
is extensive and the terminal plate and terminals
are to be replaced, simply cut the power cable
leads above the terminal collars and heat‐shrink
tubing, and discard the terminal plate and termi­
nals.
If damage is not extensive and it is necessary to re­
place the terminal plate or terminal components,
carefully cut away the tubing and adhesive. Dis­
connect the power cable leads from the terminal
posts, and separate the terminal plate from the ter­
minal housing. Unscrew the terminal posts (1), and
remove the terminal collars (2), posts and dyna
seal washers (20) from the terminal plate.
Remove the hardware (4 and 5) securing the green
and yellow ground lead terminals (6 and 17) to the
terminal housing. Reinstall the hardware in the ter­
minal housing.
See Terminal Housing/Power Cable Reassemb­
ly if no further disassembly is required.