Gorman-Rupp Pumps 14A20-B 740693 and up - Manual (Page 33)

10 SERIES OM-00660
MAINTENANCE & REPAIR PAGE E - 10
cover gasket (40) and slide the back cover assem­
bly (43) into the pump casing. Be sure the wear
plate does not bind against the impeller.
NOTE
To ease future disassembly, apply a film of grease
or `Never‐Seez' on the back cover shoulder, or any
surface that contacts the pump casing. This action
will reduce rust and scale build‐up.
Secure the back cover assembly by installing the
clamp bar (42) and tightening the clamp bar screw
(41). Do not over‐tighten the clamp bar screw; it
should be just tight enough to seal the back cover
shoulder.
Suction Check Valve Installation
Inspect the check valve components and replace
as required. Subassemble the check valve weights
(63 and 65) and check valve (64) using the attach­
ing hardware (61 and 62).
Position the check valve assembly (60) in the suc­
tion port with the large weight towards the inside of
the casing and install the suction flange (48). Se­
cure the complete assembly with the nuts (58).
Check the operation of the check valve to ensure
proper seating and free movement.
Final Pump Assembly
Secure the pump to the base with the previously re­
moved hardware. Be sure to reinstall any leveling
shims used under the pump mounting feet.
Be sure the pump and power source are securely
mounted to the base.
Install the suction and discharge lines and open all
valves. Make certain that all piping connections are
tight, properly supported and secure. Open all the
valves in the suction and discharge lines.
Be sure the pump and power source have been
properly lubricated, see LUBRICATION.
Remove the fill cover assembly (50) and fill the
pump casing with clean liquid. Reinstall the fill cov­
er and tighten it.
Refer to OPERATION, Section C, before putting
the pump back into service.
LUBRICATION
Bearings
The pedestal was fully lubricated when shipped
from the factory. Check the oil level regularly
through the sight gauge (76) and maintain it at the
middle of the gauge. When lubrication is required,
add SAE No. 30 non‐detergent oil through the hole
for the air vent (14). Do not over‐lubricate. Over‐lu­
brication can cause the bearings to over‐heat, re­
sulting in premature bearing failure.
Under normal conditions, drain the pedestal once
each year and refill with approximately 12‐1/2
ounces (0,37 liter) of clean oil to the middle of the
sight gauge. Change the oil more frequently if the
pump is operated continuously 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.
Seal Assembly
Fill the bottle oiler (66) with SAE No. 30 non‐deterg­
ent oil. Check the oil level regularly and keep the
bottle oiler full.
Power Source
Consult the literature supplied with the power
source, or contact your local power source repre­
sentative.