Gorman-Rupp Pumps 82D1-EX13-X 1390156 and up - Manual (Page 15)

OM−06106 80 SERIES
OPERATION PAGE C − 3
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.
The engine used on the pump is not standard. The
manual ON/OFF switch, which is referred to in the
engine operation manual, has been removed. To
stop the engine, move the speed control lever to
the lowest setting.
Cold Weather Preservation
Since the application of this pump is limited to pe-
troleum products, normal freezing conditions
should not damage the pump. However, during ex-
tremely severe conditions, care should be exer-
cized during start-up, especially if the pump has
been idle for more than a few hours.