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Gorman-Rupp Pumps 82D1-GX160 1257391 and up User Manual

Page 14

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OM−05297

80 SERIES

OPERATION

PAGE C − 3

Open the suction line, and read the vacuum gauge
with the pump primed and at operation speed.
Shut off the pump. The vacuum gauge reading will
immediately drop proportionate to static suction
lift, and should then stabilize. If the vacuum reading
falls off rapidly after stabilization, an air leak exists.
Before checking for the source of the leak, check
the point of installation of the vacuum gauge.

STOPPING

Never halt the flow of liquid suddenly. If the liquid
being pumped is stopped abruptly, damaging
shock waves can be transmitted to the pump and
piping system. Close all connecting valves slowly.

On engine driven pumps, reduce the throttle
speed slowly and allow the engine to idle briefly be-
fore stopping.

If the application involves a high discharge
head, gradually close the discharge
throttling valve before stopping the pump.

After stopping the pump, remove the spark plug

wire to ensure that the pump will remain inopera-

tive.

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.