Liquid Temperature; Pump Vacuum Check; Stopping; Bearing Temperature Check - Pioneer PT Series Operation & Maintenance Manual

Liquid Temperature and Overheating
The maximum liquid temperature for this pump is 160º F (71º C). Do not apply it at a higher
operating temperature.
Overheating can occur if operated with the valves in the suction and/or discharge lines closed.
Operating against closed valves could bring the liquid to a boil, build pressure, and cause the
pump to rupture or explode. If overheating occurs, stop the pump and allow it to cool before
servicing it. Refill the pump casing with cool liquid.

Pump Vacuum Check

With the pump inoperative, install a vacuum gauge in the system. Block the suction line and
start the pump. At operating speed, the pump should pull a vacuum of 20 inches of mercury
(508.0 mm) or more. If it does not, check for air leaks at the suction piping gaskets.

STOPPING

Never halt the flow of liquid suddenly. If the liquid being pumped is stopped abruptly,
damaging shock waves can be transmitted to the pump and piping system. Close all connecting
valves slowly.
On engine driven pumps, reduce the throttle speed slowly and allow the engine to idle briefly
before stopping.
Cold Weather Protection
If the pump is to remain idle during below freezing conditions, drain the pump to prevent
damage from freezing. Also, clean out any solids by flushing with a hose.

Bearing Temperature Check

Bearings normally run at higher than ambient temperatures because of heat generated by
friction. Temperatures up to 160º F (71º C) are considered normal for bearings, and they can
operate safely to at least 180º F (82º C).
Measure bearing temperature with a contact type thermometer.

MAINTENANCE

WARNING!!!
Before attempting to service this pump, read this manual carefully. Operators and maintenance
personnel should have a good understanding of all aspects of this pump and the pumping
conditions. Failure of operating personnel to be familiar with all aspects of pump operation
outlined in this manual could contribute to equipment damage, bodily injury or possible death.
WARNING!!!
Before any servicing:
1) Read this manual carefully.
2) Shut down driver and lock out incoming power to ensure that the pump will remain
inoperative.
3) If the pump or components are hot, allow adequate cooling prior to servicing the unit.
4) Close the suction and discharge valves.
5) Vent the pump slowly and drain completely.
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