Gorman-Rupp Pumps PAH4D60-QSB4.5P 1514254 and up - Manual (Page 17)

OM-06551 PAH SERIES
OPERATION PAGE C - 4
After stopping the pump, switch off the engine igni­
tion and remove the key to ensure that the pump
will remain inoperative.
Automatic Stopping
In the automatic mode, the pump will stop when
the liquid in the wet well or sump lowers and acti­
vates the “Off” float switch(s). The pump will restart
automatically when the liquid rises and activates
the “On” float switch(s).
Safety Shutdown System
The unit is equipped with a safety system to auto­
matically shut down the engine under certain con­
ditions. The engine will automatically shut down:
1. If the engine exceeds its safe operating tem­
perature.
2. If the engine oil pressure drops below design
limits.
3. If the engine fails to start within a pre‐set peri­
od of time.
4. If the engine speed exceeds the safe operat­
ing range.
5. If the engine fan belt breaks.
Lights on the control panel will indicate which of the
safety features has caused the engine to shut
down.
Should any of the safety features cause the engine
to shut down, the cause must be determined and
corrected before putting the unit back into service.
The engine will not restart until the key switch has
been returned to the `OFF' position for at least 10
seconds.
All safety shutdown features are pre‐set at the fac­
tory for optimum performance and safety; do not
attempt to adjust these settings.
Never disconnect any of the safety shut­
down features; this will void the warran­
ty and could result in serious damage to
the unit and/or injury to personnel. Safe­
ty shutdown features are pre‐set at the
factory; do not attempt to adjust any of
the settings. Determine the cause of
shutdown before
putting the unit back
into service. Consult the factory for ad­
ditional information.
PERIODIC CHECKS
Seal Cavity And Bearing Lubrication
Both the seal and bearing cavities were fully lubri­
cated at the factory. Check the lubrication levels
before startup, and regularly thereafter as indi­
cated in Section E, Maintenance and Repair.
When lubrication is required, use only SAE No. 30
non‐detergent oil.
Bearing Temperature Check
Bearings normally run at higher than ambient tem­
peratures because of heat generated by friction.
Temperatures up to 160
_
F (71
_
C) are considered
normal for bearings, and they can operate safely to
at least 180
_
F (82
_
C).
Checking bearing temperatures by hand is inaccu­
rate. Bearing temperatures can be measured ac­
curately by placing a contact‐type thermometer
against the housing. Record this temperature for
future reference.
A sudden increase in bearing temperatures is a
warning that the bearings are at the point of failing
to operate properly. Make certain that the bearing
lubricant is of the proper viscosity and at the cor­
rect level (see LUBRICATION in Section E, Main­
tenance and Repair). Bearing overheating can
also be caused by shaft misalignment and/or ex­
cessive vibration.
When pumps are first started, the bearings may
seem to run at temperatures above normal. Con­
tinued operation should bring the temperatures
down to normal levels.
Engine Fuel Filter
Consult the manual accompanying the engine,
and change the fuel filter periodically as indicated.
If operated under extremely dusty and/or humid