S SERIES PUMPS
OM-06258
MAINTENANCE AND REPAIR
PAGE E - 20
tend beyond the terminal housing. Temporarily
tape the green and yellow ground wires to the
cable.
Sealing Terminal Housing Connections
With Silicone Adhesive
(Figure E-2)
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 (2) were encapsulated in heat‐
shrink tubing (3), and bonded to the terminal plate
(19) with silicone adhesive to provide a water‐tight
seal. If this insulating material has been damaged
or removed during maintenance,
it must
be re
placed 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
and control 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 con
nections to the terminal plate. If this alternate seal
ing method is used, refer to the instructions in
Seal
ing Terminal Plate Connections With Potting
Compound
. Use
only
materials and heating equip
ment approved by Gorman‐Rupp for field repairs.
Before resealing the power and control cables, re
move all the old adhesive material (or potting com
pound) from the leads, terminal collars, and termi
nal plate. Inspect all parts for damage, and replace
as required. If the rubber bonding material on the
terminal plate (19) is severely worn or cracked, the
terminal plate must be replaced. If the bonding ma
terial has been noticeably compressed, it should
be supplemented with two gaskets contained in
the overhaul gasket kit (see Options listed in the
Parts List manual).
NOTE
Clean the cable leads and terminal plate in the ar
eas to be sealed with cleaning solvent. Incomplete
sealing will occur if the surfaces are dirt, oil or
grease coated.
Assemble the terminal posts (1), dyna seal wash
ers (20 ), and terminal collars (2) to the terminal
plate as shown in Figure E-2.
NOTE
Both the power cable and motor conductor leads
should be tinned prior to reassembly.
Slide a length of heat‐shrink tubing (3) up over
each of the power cable leads. Insert the leads in
the terminal collars and secure them using the al
len head setscrews (18). Slide the tubing down
each lead until the terminals are covered and the
tubing contacts the terminal plate. The tubing
must
extend up the leads far enough to ensure a
good seal.
Carefully heat each tube with a commercially avail
able hot air gun capable of producing 750
F
(399
C), and shrink the tubes around the cable
leads and terminal collars.
Use
only
Dow‐Corning 737 Silicone Adhe
sive (see the Parts List for the part number)
or potting compound for sealing terminal
housing connections. Use of unapproved
sealing products will void the pump war
ranty.
NOTE
Do not
use a mold or reservoir with the silicone
adhesive.
