Gorman-Rupp Pumps PA6C60C-B-E50 460/3 1528569 and up - Manual (Page 23)

OM-06531 PA SERIES
OPERATION PAGE C - 4
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 the Maintenance
and Repair Manual). Bearing 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.