Gorman-Rupp Pumps RD2A31-BAR All serial numbers - Manual (Page 15)

OM-03989 RS AND RD SERIES PUMPS
PAGE C - 1 OPERATION
OPERATION - SECTION C
GENERAL INFORMATION
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 petro­
leum products or other similar hydro­
carbon liquids. Do not attempt to pump
water, corrosive
materials, or any liq­
uids which may damage the pump or en­
danger personnel as a result of pump
failure.
This pump is not designed to handle water.
Operation of the pump with water or water‐
based solutions will damage the group
grind within the vane‐type priming pump.
Do not connect this pump to a storage
tank which has been filled with water until
the tank and lines have been completely
drained and flushed. Install a commercially
available 80 mesh screen and a filter in the
suction line to prevent debris from entering
the pump. Check pump rotation with the
suction line disconnected.
Pump speed and operating condition
points must be within the continuous per­
formance range shown on the curve (see
the Parts List Manual, Page 1).
PRIMING
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 the pump is properly lubri­
cated (see LUBRICATION in MAINTENANCE
AND REPAIR).
Never operate this pump unless there is
liquid in the pump casing. The pump will
not prime when dry. Extended operation of
a dry pump will destroy the seal assembly.
If the pump is installed within a closed
building such as a pump house, venting
lines to the outside of the building should
be installed in accordance with National
and local codes.
Priming Pump
Before starting the pump for the first time, carefully
remove the spring cap, gasket and pressure regu­
lating spring located in the top of the group grind
(see the parts list for identification). Pour approxi­
mately 4 ounces (0,12 liter) of SAE 10 or 20 non‐de­
tergent oil into the group grind to lubricate the shaft
seal and group grind rotor blades. Reinstall the
spring, gasket and cap.
Before attempting to start the motor, rotate the
pump shaft by hand to ensure the oil is evenly dis­
tributed within the group grind. If the shaft does not
rotate by hand, allow the pump to sit to absorb the
lubricating oil and then rotate the shaft again. Do
not start the pump motor until the shaft has been
rotated by hand.
Whenever air or vapor is present in the suction line,
whether at start‐up or during pumping operation,