Gorman-Rupp Pumps 16C20-F4L 1317844 and up - Manual (Page 19)

OM-01604 10 SERIES
OPERATION PAGE C - 4
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
tinued operation should bring the temperatures
down to normal levels.
Cold Weather Preservation
In below freezing conditions, drain the pump to
prevent damage from freezing. Also, clean out any
solids by flushing with a hose. Operate the pump
for approximately one minute; this will remove any
remaining liquid that could freeze the pump rotat­
ing parts. If the pump will be idle for more than a
few hours, or if it has been pumping liquids con­
taining a large amount of solids, drain the pump,
and flush it thoroughly with clean water. To prevent
large solids from clogging the drain port and pre­
venting the pump from completely draining, insert
a rod or stiff wire in the drain port, and agitate the
liquid during the draining process. Clean out any
remaining solids by flushing with a hose.