Gorman-Rupp Pumps PA6A60-4045D 1110032 thru 1115250 - Manual (Page 20)

OM−04402 PA SERIES PUMPS
OPERATION PAGE C − 5
below the recommended operating speed (if appli-
cable).
Never tamper with the governor to gain
more power. The governor establishes
safe operating limits that should not be
exceeded. Refer to the Performance
Curve in the separate Parts List Manual
for the maximum continuous operating
speed for this pump.
Operation In Extreme Heat
(Engine Driven Auto-Start Units)
The safety shutdown system will automatically
stop the unit if engine operating temperature ex-
ceeds design limits. If engine over-temperature
shutdown occurs, allow the unit to cool before re-
starting.
If engine overheating continues, check the engine
lubricant level and viscosity. Consult the engine
operation manual for the recommended lubricant
for operation in extreme heat.
If the unit is being operated in the automatic mode,
adjust the float(s) to allow shorter run and longer
cooling periods, if possible.
This pump is equipped with automatic
liquid level controls, and is subject to
automatic restart. Keep hands and
clothing away from the unit to prevent
injury during automatic operation. Dis-
connect the battery before performing
any maintenance. Failure to do so may
result in serious personal injury.
OPERATIONAL CHECKS
(All Models)
Leakage
Once the pump is fully primed, no leakage should
be visible at pump mating surfaces, or at pump
connections or fittings. Keep all line connections
and fittings tight to maintain maximum pump effi-
ciency.
Pump Vacuum Check
Read the vacuum gauge with the pump primed
and at operation speed. Shut off the pump. The
vacuum gauge reading will immediately drop pro-
portionate to static suction lift, and should then sta-
bilize. If the vacuum reading falls off rapidly after
stabilization, an air leak exists. Before checking for
the source of the leak, check the point of installa-
tion of the vacuum gauge.
Eductor Discharge Line
Check the eductor discharge line for liquid bypass.
If bypass occurrs, shut down the pump. Refer to
the Maintenance and Repair Manual, disassemble
and clean the float and valve assembly inside the
priming chamber.
Liquid Temperature And Overheating
Overheating can occur if operated with the valves
in the suction or discharge lines closed. Operating
against closed valves could bring the liquid to a
boil, build pressure, and cause the pump to rup-
ture or explode. If overheating occurs, stop the
pump immediately and allow it to completely cool
before servicing it. Approach any over-heated
pump cautiously.
Do not remove plates, covers, gauges,
pipe plugs, or fittings from an over-
heated pump. Vapor pressure within the
pump can cause parts being disen-
gaged to be ejected with great force. Al-
low the pump to completely cool before
servicing.