Giant LP460, Operating Instructions/ Repair And Service Manual

Page: 2 / 12

2
INSTALLATION INSTRUCTIONS
4. Use of a dampener is necessary to mini-
mize pulsation at drive elements, plumbing,
connections, and other system areas. The
use of a dampener with Giant Industries, Inc.
pumps is optional, although recommended by
Giant Industries, Inc. to further reduce system
pulsation. Dampeners can also reduce the se-
verity of pressure spikes that occur in systems
using a shut-off gun. A dampener must be
positioned downstream from the unloader.
5. Crankshaft rotation on Giant Industries, Inc.
pumps should be made in the direction desig-
nated by the arrows on the pump crankcase.
Reverse rotation may be safely achieved by
following a few guidelines available upon
request from Giant Industries, Inc. Required
horsepower for system operation can be ob-
tained from the chart on page 3.
6. Before beginning operation of your pump-
ing system, remember: Check that the crank-
case and seal areas have been properly
lubricated per recommended schedules. Do
not run the pump dry for extended periods of
time. Cavitation will result in severe damage.
Always remember to check that all plumbing
valves are open and that pumped media can
flow freely to the inlet of the pump.
IMPORTANT OPERATING CONDITIONS
Failure to comply with any of these conditions invalidates the warranty.
2. Pump operation must not exceed rated
pressure, volume, or RPM. A pressure relief
device must be installed in the discharge of the
system.
3. Acids, alkalines, or abrasive fluids cannot
be pumped unless approval in writing is ob-
tained before operation from Giant Industries,
Inc.
4. Run the pump dry approximately 10 sec-
onds to drain the water before exposure to
freezing temperatures.
1. Prior to initial operation, add oil to the
crankcase so that oil level is between the
two lines on the oil dipstick. DO NOT
OVERFILL.
Use SAE 90 Industrial gear oil or
Giant’s p/n 01154
Crankcase oil should be changed after
the first 50 hours of operation, then at regu -
lar intervals of 500 hours or less depending
on operating conditions.
Installation of the Giant Industries, Inc.,
pump is not a complicated procedure, but
there are some basic steps common to all
pumps. The following information is to be
considered as a general outline for instal-
lation. If you have unique requirements,
please contact Giant Industries, Inc. or your
local distributor for assistance.
1. The pump should be installed flat on a base
to a maximum of a 15 degree angle of inclina-
tion to ensure optimum lubrication.
2. The inlet to the pump should be sized for the
flow rate of the pump with no unnecessary re -
strictions that can cause cavitation. Teflon tape
should be used to seal all joints. If pumps are to
be operated at temperatures in excess of 140
0
F, it is important to insure a positive head to the
pump to prevent cavitation. If there is danger
of frost, the water in the pump and in the pump
fittings (particularly the unloader valve) must be
emptied. Use the second discharge port and run
the pump dry for 1-2 minutes.
3. The discharge plumbing from the pump
should be properly sized to the flow rate to
prevent line pressure loss to the work area. It
is essential to provide a safety bypass valve
between the pump and the work area to protect
the pump from pressure spikes in the event of a
blockage or the use of a shut-off gun.
Finally, remember that high pressure operation in a pump system has many advantages. But, if it
is used carelessly and without regard to its potential hazard, it can cause serious injury.