Gorman-Rupp Pumps 612L20-B 814882 and up - Manual (Page 29)

60 SERIES OM−01395
MAINTENANCE & REPAIR PAGE E − 10
Remove the setscrews (41) from the impeller nut
(42). Apply Never-Seez" or equivalent compound
to the shaft threads and screw the impeller nut onto
the shaft. Immobilize the impeller as shown in Fig-
ure E−2, and torque the impeller nut to 300 ft. Lbs.
(42 m. kg.).
Apply Loctite No. 242" or equivalent compound to
the setscrews (41). Install new inserts (42), and
torque the setscrews to 18 ft. lbs. (216 in. lbs. or 2,5
m. kg.).
Pump Casing Installation
Install the casing gasket (36) over the pump casing
studs (4 and 37). Use a suitable hoist and sling to
position the casing over the impeller and slide the
studs through the seal plate and pedestal mount-
ing holes.
Install the air vent and piping (6, 7 and 8). Secure
the bracket and casing with the hardware (5 and
38).
Suction Head And Wear Ring Installation
If the wear ring (44) was removed, chill the wear
ring by refrigeration and use an oven to heat the
suction head. Press the wear ring into the suction
head until fully seated and allow it to cool.
The wear ring must seat squarely in the
suction head; otherwise binding and/or ex-
cessive wear will occur. Use caution when
handling hot parts to prevent burns.
Install the suction head gasket (49) over the studs
(47). Position the suction head over the studs and
secure it with the nuts (48).
Rotate the impeller shaft by hand to check for
scraping or binding and correct any before putting
the pump back into service.
LUBRICATION
Seal Assembly
Fill the bottle oiler (9) with SAE No. 30 non-deter-
gent oil. Check the oil level regularly and refill as re-
quired.
Bearings
The pedestal was fully lubricated when shipped
from the factory. Check the oil level regularly
through the sight gauges (27)
and maintain it at the
midpoint of the gauges. When lubrication is re-
quired, remove the vented plug (17) and add SAE
No. 30 non-detergent oil through the opening.
Clean and reinstall the vented plug. Do not over-lu-
bricate. Over-lubrication can cause the bearings to
over-heat, resulting in premature bearing failure.
NOTE
The white reflector in the sight gauge must be posi-
tioned horizontally to provide proper drainage.
Under normal conditions, drain the bearing hous-
ing once each year and refill with clean oil. Change
the oil more frequently if the pump is operated con-
tinuously or installed in an environment with rapid
temperature change.
Monitor the condition of the bearing lubri-
cant regularly for evidence of rust or mois-
ture condensation. This is especially im-
portant in areas where variable hot and
cold temperatures are common.
For cold weather operation, consult the factory or a
lubricant supplier for the recommended grade of
oil.
Power Source
Consult the literature supplied with the power
source, or contact your local power source repre-
sentative.