Gorman-Rupp Pumps S8B1-E100 460/3 1432260 and up - Manual (Page 47)

OM-06259 S SERIES PUMPS
PAGE E - 21 MAINTENANCE AND REPAIR
avoid ingestion or prolonged contact
with the skin. Read and follow all warn­
ings and recommendations accompa­
nying the potting kit.
See the instructions with the potting kit regarding
application life and setting and curing time. Mix the
base compound and accelerator and fill the mold
until the electrical connections are completely in­
sulated. Tamp the potting material to eliminate air
bubbles and ensure the material has completely
covered the area around the terminal posts.
NOTE
The potting compound must completely cover the
terminal collar and lead connections.
When potting has been completed, leave the ter­
minal plate assembly undisturbed until the potting
material has cured. Complete curing usually takes
about 24 hours. Curing time can be shortened by
using a heat lamp, but be careful not to melt the
potting or potting mold, or burn the cable. When
the potting material is no longer “tacky” to the
touch, it has cured.
Terminal Housing Installation
(Figure E-2)
After the terminal plate has been sealed, slide the
terminal housing down the cable. Untape the
ground leads and secure the terminals (6 and 17)
to the terminal housing with the hardware (4 and
5). Be sure the leads make good contact with the
housing.
Pull gently on the cable to remove any excess
length from within the terminal housing. The termi­
nal plate should fit loosely against the terminal
housing.
Lubricate the upper bore of the terminal housing,
and slide the gland bushing (8) into place. Slide the
terminal gland (12) into place and install the nuts
(14). Do not fully tighten the nuts at this time.
Attach the appropriate motor lead (T1, T2, T3) to
each terminal post (1) using the allen head set­
screws (21).
Position the terminal housing and terminal plate
against the upper motor housing. If required, ro­
tate the terminal housing and twist the motor leads
to remove excess slack.
(Figure E-1)
Coat the threads of the motor housing studs (37)
with `Never‐Seez' or equivalent compound, and
secure the terminal housing assembly to the motor
housing with the hardware (38); torque the nuts
evenly in a cross sequence to 20 ft. lbs. (240 in. lbs.
or 2,8 m. kg.). Tighten the nuts (14, Figure 2) draw­
ing the terminal gland (12) down into the terminal
bore. Do not overtighten and damage the terminal
gland or hardware.
NOTE
A .12 in. (3,05 mm) gap is required between the ter­
minal gland cap flange and the terminal housing
when tighten the nuts.
See FINAL ASSEMBLY and VACUUM TESTING
followed by LUBRICATION.
FINAL ASSEMBLY
(Figure E-1)
If the discharge flange (26) was removed from the
motor housing, replace the discharge flange gas­
ket (15). Apply `Never‐Seez' or equivalent com­
pound on the flange studs (32), and secure the
flange with the nuts (33).
If the hoisting bail (21) was removed, install the bail
bushings (20) and secure the bail to the motor
housing with the hardware (22, 23 and 24).
Connect the discharge hose, and reposition the
pump. If rigid piping or long hose is used, reposi­
tion the pump, then connect the piping.
VACUUM TESTING
To ensure the water‐tight integrity of the pump, it is
recommended that the motor and seal cavities be
vacuum tested any time the seal(s) and/or motor
are serviced.
Drain all of the oil from both the seal and motor
cavities before performing the test. Oil within the
cavities will be drawn into the system, resulting in
damage to the vacuum pump or manometer.
Use a manometer with a range of 30 to 0 to 30 inch­
es of mercury to perform the test. Do not use a vac­
uum gauge. Vacuum gauges are not sensitive
enough to detect minor leaks.