Gorman-Rupp Pumps S4B1-E50 460/3 1396095 and up - Manual (Page 45)

OM-06099 S SERIES PUMPS
PAGE E - 19 MAINTENANCE AND REPAIR
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 (14), dyna seal wash­
ers (16 ), and terminal collars (12) 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 (10) up over
each of the power cable leads. Insert the leads in
the terminal collars and secure them using the al­
len head setscrews (11). 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 Manual for the part
number) or potting compound for sealing
terminal housing connections. Use of un­
approved sealing products will void the
pump warranty.
NOTE
Do not use a mold or reservoir with the silicone
adhesive.
See Figure E-6 and check terminal locations. Ap­
ply a 1/4 to 3/8 in. (6,4 to 9,7 mm) thick layer (maxi­
mum) of silicone adhesive around each of the ter­
minal posts as shown in Figure E-5. Remove any
adhesive from gasketed surfaces.
Silicone Sealant
Figure E-5. Silicone Adhesive Sealing
All air pockets, voids or gaps in the sili­
cone sealant must be removed to en­
sure a water‐tight seal in the terminal
housing. Otherwise, moisture entering
the terminal housing could cause a
short circuit, resulting in pump damage
and possible serious injury or death to
personnel.
Allow the adhesive to cure for at least one hour be­
fore securing the terminal housing to the motor
housing.