Giant LP250-5100HK, Operating Instructions/ Repair And Service Manual

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INSTALLATION INSTRUCTIONS
4. Use of a dampener is necessary to minimize
pulsation at drive elements, plumbing, con-
nections, 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 pulsa-
tion. Dampeners can also reduce the severity
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 designat-
ed by the arrows on the pump crankcase. Re-
verse rotation may be safely achieved by follow-
ing a few guidelines available upon request from
Giant Industries, Inc. Required horsepower for
system operation can be obtained from the chart
on page 3.
6. Before beginning operation of your pumping
system, remember: Check that the crankcase
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 pres-
sure, 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 obtained
before operation from Giant Industries, Inc.
4. Run the pump dry approximately 10 seconds
to drain the water before exposure to freezing
temperatures.
1. Prior to initial operation, add oil to the crank-
case so that oil level is between the two lines on
the oil dipstick. DO NOT OVERFILL.
Use Giant gear lube oil (p/n 1154) or the
equivalent SAE 90 Industrial gear oil.
Crankcase oil should be changed after the
first 50 hours of operation, then at regular inter -
vals 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 installa-
tion. 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 inclination
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.
3. The discharge plumbing from the pump
should be properly sized to the flow rate to pre -
vent line pressure loss to the work area. It is es-
sential 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 care-
lessly and without regard to its potential hazard, it can cause serious injury.