Gorman-Rupp Pumps PA4A60C-B-E30 575/3 1482736 and up - Manual (Page 23)

OM−06440 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.
Air Compressor Drive Belt
Like all V-belts, the adjustable V-belt may require
periodic adjustment to maintain the correct ten-
sion. Check the air compressor V-belt after the first
24 hours of operation, then regularly therafter to
ensure proper tension. Refer to the separate docu-
ment accompanying the unit for V-belt replace-
ment and adjustment procedures.
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.