OM-01516
D SERIES
OPERATION
PAGE C - 1
OPERATION - SECTION C
Review all SAFETY information in Section A.
Follow the instructions on all tags, labels and
decals attached to the pump.
This pump is designed to handle
non‐
volatile non‐flammable liquids contain
ing specified entrained solids. Do not
attempt to pump volatile, corrosive, or
flammable liquids which may damage
the pump or endanger personnel as a
result of pump failure.
After the pump has been installed, block
the wheels and secure the pump to pre
vent creeping. Make certain that the
pump and all piping or hose connec
tions are tight, properly supported and
secure before operation.
Pump application will affect its performance, espe
cially discharge velocities. Consult the Gorman‐
Rupp factory for actual performance levels for the
pump.
Install the pump and piping as described in
IN
STALLATION
. Make sure that the piping connec
tions are tight, and that the pump is securely
mounted. Check that components are properly lu
bricated (see
LUBRICATION
in
MAINTENANCE
AND REPAIR
).
Make certain that any positive shut‐off
valve installed in the suction line is open
before operating the pump; excessive re
striction will cause incomplete filling of the
diaphragm chamber and result in short
ened diaphragm life. No positive shut‐off
valve should be installed in the discharge
line.
STARTING
Consult the operations manual furnished with the
motor before starting the pump. Open any valves
installed in the suction line and start the pump.
OPERATION
The pump is designed to operate at ap
proximately 52 cycles per minute through
a gearbox with A 33.34:1 ratio and a 1750
RPM
maximum
input drive. Make certain
that the electric motor installed does not
exceed this rpm; otherwise, pump compo
nents may be destroyed.
Priming
The pump may not prime immediately because the
suction line must first fill with liquid. If the pump fails
to prime within five minutes, stop the motor and
check the suction line for leaks.
OPERATION CHECKS
Gearbox Check
Check that the gearbox is properly lubricated (see
LUBRICATION
in
MAINTENANCE AND RE
PAIR
).
Leakage Check
No leakage should be visible at pump mating sur
faces, connections or fittings. Keep all line connec
tions and fittings tight to maintain maximum pump
efficiency.
Strainer Check
If a suction strainer has been installed, check and
clean it as necessary. It should be cleaned if pump
