Gorman-Rupp Pumps 88B2-F5L 1323330 and up - Manual (Page 16)

OM−02301 80 SERIES
OPERATION PAGE C − 4
head, gradually close the discharge
throttling valve before stopping the pump.
After stopping the pump, close and lock the control
panel cover, or disconnect the positive battery
cable to ensure that the pump will remain inopera-
tive.
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 speed exceeds the safe operat-
ing range.
4. 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.
OPERATION IN EXTREME HEAT
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 equipped with the optional auto-start
control, the float(s) may need to be adjusted to al-
low shorter run and longer cooling periods, if pos-
sible.
If the pump is equipped with the option-
al automatic starting system, it is sub-
ject to automatic restart. Keep hands
and clothing away from the unit to pre-
vent injury during automatic operation.
Disconnect the battery before perform-
ing any maintenance. Failure to do so
may result in serious personal injury.
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). Bear-
ing overheating can also be caused by shaft
misalignment and/or excessive vibration.
When pumps are first started, the bearings may
seem to run at temperatures above normal. Con-