S SERIES PUMPS
OM-07089
MAINTENANCE AND REPAIR
PAGE E - 22
Refer to
PUMP END REASSEMBLY
, and reas
semble the pump end components.
Terminal Housing And Power Cable
Reassembly And Installation
(Figure E-3)
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
position and locked out, or that the pow
er 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 startup. Obtain the ser
vices of a qualified electrician to make
electrical connections.
Clean the exterior of the power cables with warm
water and mild detergent. Check for obvious physi
cal damage. Check the cables for continuity and
insulation resistance (see
Electrical Testing
in
TROUBLESHOOTING
).
Do not
attempt repairs
except to cut off either end of the cables;
splicing
is not recommended
. Reinstall any wire tags or
terminals which may have been removed.
Never attempt to alter the length or re
pair any power cable with a splice. The
pump motor and cable must be com
pletely waterproof. Injury or death may
result from alterations.
Use oil to lightly lubricate the upper bore of the ter
minal housing (8), outside of the pump power
cables (1), and the bores of terminal glands (5),
cable grips (2), gland bushings (6) and terminal
washers (7) for ease of assembly. Slide the termi
nal glands, cable grips, gland bushings, terminal
washers and terminal housing onto the power
cables, allowing approximately 3 ft. (1 m) of each
cable to extend beyond the terminal housing. Tem
porarily tape the green and yellow ground wires to
the cables.
Sealing Terminal Housing Connections
With Silicone Adhesive
(Figure E-3)
Do not attempt to operate this pump un
less the power cable leads are properly
sealed in the terminal housing. Mois
ture entering the terminal housing
could cause a short circuit, resulting in
pump damage and possible serious in
jury or death to personnel.
When shipped from the factory, the cable leads
and terminal collars (14) were encapsulated in
heat‐shrink tubing (12), and bonded to the terminal
plate (21) with silicone adhesive to provide a water‐
tight seal. If this insulating material has been dam
aged or removed during maintenance,
it must
be
replaced using materials and equipment approved
by Gorman‐Rupp (see the Parts List for repair kits).
NOTE
Heat‐shrink tubing
must
be used to seal the power
cable leads to the terminals before bonding the
leads to the terminal plate. If silicone adhesive is
not available in the field, a commercially available
potting kit may be used to bond the connections to
the terminal plate. If this alternate sealing method is
used, refer to the instructions in
Sealing Terminal
Plate Connections With Potting Compound
. Use
only
materials and heating equipment approved by
Gorman‐Rupp for field repairs.
Before resealing the power cables, remove all the
old adhesive material (or potting compound) from
the leads, terminal collars, and terminal plate. In
spect all parts for damage, and replace as re
quired. If the rubber bonding material on the termi
nal plate (21) is severely worn or cracked, the ter
minal plate must be replaced. If the bonding mate
rial has been noticeably compressed, it should be
