Gorman-Rupp Pumps 112G60-B 1214462 and up - Manual (Page 34)

OM−05174 10 SERIES
MAINTENANCE & REPAIR PAGE E − 11
peller. Back off each of the adjusting screws 1/2
turn, then tighten the jam nuts until they are snug
against the suction head. Re-tighten the hardware
(12 and 13).
Secure the suction elbow support (84) to the suc-
tion elbow using the hardware (86 and 87). Rein-
stall any leveling shims used under the pedestal
foot and suction elbow support.
Suction Check Valve Installation
Install one stainless steel flat washer (102) on each
side of the bearing pivot arm. Secure the check
valve (106) and pivot caps (103) to the check valve
body (104) with the hardware (100 and 105).
NOTE
Be sure the check valve is positioned so that the
1/2" diameter core holes face toward the interior of
the pump.
Secure the check valve body to the suction elbow
with the Victaulic" coupling (4). Be sure the rubber
gasket is properly seated and not damaged.
Reach through the cover plate access opening
and check the operation of the check valve to en-
sure proper seating and free movement.
Final Pump Assembly
Install the shaft key (49) and connect the pedestal
assembly to the power source. Be sure the pump
and power source are proper aligned, (see Align-
ment in INSTALLATION) before installing the lev-
eling shims and base mounting hardware.
Fill the pump casing with clean liquid. Reinstall the
cover plate assembly (6) and gasket (5) and
tighten it.
Be sure the pump and power source are securely
mounted to the base and that they are properly
aligned. If used, removed the eye bolt used to lift
component parts.
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.
Refer to OPERATION, Section C, before putting
the pump back into service.
PRESSURE RELIEF VALVE
MAINTENANCE
The suction elbow is equipped with a pressure re-
lief valve (97) to provide additional safety for the
pump and operator (refer to Liquid Temperature
And Overheating in OPERATION).
It is recommended that the pressure relief valve as-
sembly be replaced at each overhaul, or any time
the pump overheats and activates the valve. Never
replace this valve with a substitute which has not
been specified or provided by the Gorman-Rupp
Company.
Periodically, the valve should be removed for in-
spection and cleaning. When reinstalling the relief
valve, apply ‘Loctite Pipe Sealant With Teflon No.
592’ or equivalent compound, on the relief valve
threads. Position the valve air vent with the dis-
charge port pointing down.
LUBRICATION
Bearings
The pedestal was fully lubricated when shipped
from the factory. Check the oil level regularly and
maintain it at the middle of the glass in the oil cup
reservoir. When lubrication is required, unscrew
the glass from the base of the reservoir. Fill the
glass through the beveled tube with SAE No. 30
non-detergent oil. When the glass is full, quickly
turn it over, inserting the beveled tube into the res-
ervoir base. Repeat as necessary until the oil level
is in the middle of the glass, then screw the glass
back into the base. Maintain the oil at this level.
Under normal conditions, change the oil each
5000 hours of operation, or at twelve month inter-
vals, which ever occurs first. 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-