OM−00852
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
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.
