Gorman-Rupp Pumps 13A20-B 712987 and up - Manual (Page 33)

10 SERIES OM-00632
MAINTENANCE & REPAIR PAGE E - 10
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.
Replace the back cover gasket (41) and slide the
back cover assembly into the pump casing.
Secure the back cover assembly by installing the
clamp bar (47) and tightening the clamp bar screw
(48). Do not over‐tighten the clamp bar screw; it
should be just tight enough to seal the back cover
shoulder.
Check for scraping or binding between the impel­
ler and wear plate and correct any that exists be­
fore putting the pump back into service.
Suction Check Valve Installation
Inspect the check valve components and replace
as required. Subassemble the check valve weights
(55 and 58) and check valve gasket (54) using the
attaching hardware (56 and 57).
Position the check valve assembly (53) against the
face of the suction flange with the large weight to­
ward the inside of the pump casing. Secure the
check valve assembly and suction flange to the
pump casing with the hardware (51 and 52).
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 casing or pedestal
mounting feet. Install the shaft key (22) and con­
nect the power source.
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 plug assembly (5) and fill the pump
casing with clean liquid. Reinstall the fill plug and
tighten it.
Refer to OPERATION, Section C, before putting
the pump back into service.
LUBRICATION
Seal Assembly
Fill the bottle oiler (8) with SAE No. 30 non‐deterg­
ent oil. Check the oil level regularly and keep the
bottle oiler full.
Bearings
The pedestal was fully lubricated when shipped
from the factory. Check the oil level regularly
through the sight gauge (27) 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 (15). 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 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.
Power Source
Consult the literature supplied with the power
source, or contact your local power source repre­
sentative.