Gorman-Rupp Pumps 62E31-B All serial numbers - Manual (Page 15)

60 SERIES PUMPS OM−04020
PAGE C − 2 OPERATION
primer and the pump so that the prime will not be
lost.
DRAIN
COCK
HANDLE
Figure 1. Hand Primer Assembly
Exhaust Primers
Engine driven pumps normally take advantage of
the engine exhaust gases by using them to operate
an exhaust primer. The exhaust primer is directed
through a venturi which creates a vacuum in the
pump casing in order to fill the suction line and cas-
ing with liquid.
To prime a pump using an exhaust primer, open the
gas cock in the priming line and engage the ex-
haust primer until liquid is thrown out of the ejector
nozzle.
GAS
COCK
HANDLE
Figure 2. Exhaust Primer Assembly
Auxiliary Ejectors
Ejectors function much like exhaust primers. They
may be operated by steam, compressed air, water
or exhaust gases. To prime a pump using an ejec-
tor, open the gas cock in the priming line and oper-
ate the ejector until liquid is thrown out the ejector
nozzle.
Vacuum Pumps
Air can be exhausted to prime a pump by using a
vacuum pump. Either a wet type or a dry type vacu-
um pump may be used; however, a wet type is pre-
ferred since it will not be damaged if liquid enters it.
If a dry vacuum pump is used, provisions must be
made to keep liquid from entering it.
STARTING
Consult the operations manual furnished with the
power source.
Before connecting a motor to the incoming power,
check that the electrical service available matches
the pump motor requirements stamped on the mo-
tor nameplate. Check that the motor speed meets
pump specifications. Check the performance
curve (Parts List Manual on page 1) to see at what
speed the pump is designed to be driven.
Rotation
The correct direction of pump rotation is indicated
by an arrow on the pump body or accompanying
decals. The pump could be damaged and per-
formance adversely affected by incorrect rotation.
If pump performance is not within the specified lim-
its (see the curve in the Parts List Manual on page
1), check the direction of rotation before further
troubleshooting.
Consult the operating manual furnished with the
power source before attempting to start the power
source.
If an electric motor is used to drive the pump, re-
move V-belts, couplings, or otherwise disconnect
the pump from the motor before checking motor
rotation. Operate the motor independently while
observing the direction of the motor shaft, or cool-
ing fan.
If rotation is incorrect on a three-phase motor, have
a qualified electrician interchange any two of the
three phase wires to change direction. If rotation is
incorrect on a single-phase motor, consult the lit-
erature supplied with the motor for specific instruc-
tions.