Gorman-Rupp Pumps PAH3A60C-B 1524589 and up - Manual (Page 16)

OM-06472 PAH SERIES
OPERATION PAGE C - 3
a closed discharge throttling valve,
pump components will deteriorate, and
the liquid could come to a boil, build
pressure, and cause the pump casing to
rupture or explode.
After stopping the pump, switch off the engine igni­
tion and remove the key to ensure that the pump
will remain inoperative.
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.
Air Compressor
The air compressor was lubricated for test at the
factory. However, always check the lubrication lev­
el before startup.
Consult the manual accompanying the air com­
pressor and preform all duties and checks as indi­
cated.
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.