Gorman-Rupp Pumps SE1 1/2B3-E.33 12V 1483930 and up - Manual (Page 12)

SE SERIES OM−06490
OPERATION PAGE C − 2
the strainer screen, purging most of the debris
from it. If this fails to clean the screen, remove the
pump from the sump and remove the debris manu-
ally (see MAINTENANCE AND REPAIR in Section
E).
Never introduce air or steam pressure into the
pump casing or piping to remove a blockage. This
could result in personal injury or damage to the
equipment. If backflushing is absolutely neces-
sary, liquid pressure must be limited to 50% of the
maximum permissible operating pressure shown
on the pump performance curve (see MAINTE-
NANCE AND REPAIR, Section E).
STOPPING
After stopping the pump, be sure to perform all re-
quired maintenance and preservation procedures.
Storage and Cold Weather Preservation
After stopping the pump, disconnect the power
cables from the vehicle battery, and use the rope or
chain attached to the lifting eye on the motor cover
to remove the pump from the sump. Do not lift the
unit by the power cables or the discharge piping.
Do not attach lifting equipment to the carry handle.
Customer installed equipment such as rigid dis-
charge piping must be removed before attempting
to lift.
Do not attempt to lift the pump by the
power cables, carry handle or piping.
Attach proper lifting equipment to the
lifting eye fitted to the pump.
Clean the strainer screen before storage. If the
application involves a lot of mud or sludge, remove
the strainer and clean the impeller before storage.
NOTE
The most common cause of failure to run is hard-
ened mud or sludge in the impeller.
In freezing temperatures, the pump will not freeze
as long as it is submerged in liquid. If the pump
casing is not submerged, or if the liquid begins to
freeze, remove the pump from the sump and allow
it to dry thoroughly. Run the pump for two or three
minutes to dry the inner walls.
If the pump freezes, move it into a warm area until
completely thawed, or submerge it into the liquid. If
the liquid is near freezing, the pump must be sub-
merged for an extended period of time. Start the
pump and check for shaft rotation. If still frozen, al-
low additional thawing time before attempting to
restart.
Do not attempt to thaw the pump by using
a torch or other source of flame. This could
damage gaskets, electrical components,
or motor windings.