Gorman-Rupp Pumps S4A1-E25 460/3 1396155 and up - Manual (Page 20)

OM-06098 S SERIES PUMPS
PAGE C - 4 OPERATION
To avoid serious damage to the pump,
check for unusual noises or excessive vi­
bration while the pump is running. If noise
or vibration is excessive, stop operation
and refer to the troubleshooting chart in the
maintenance and repair manual.
The suction inlet or impeller may become clogged
with debris. In some cases, stopping the pump
momentarily may backflush this blockage. If back­
flushing does not clear the debris, remove the
pump from the sump or wet well and clear manu­
ally.
Never introduce air or steam pressure
into the pump casing to remove a block­
age. This could result in personal injury
or damage to the equipment. If back­
flushing is absolutely necessary, limit
liquid pressure input to 50% of the maxi­
mum permissible operating pressure
shown in the pump performance curve
(refer to the accompanying Parts List
Manual).
Check the pump for overheating. Overheating can
occur if the pump is misapplied, required to start
repeatedly, if the control box fails to provide over­
load or thermal protection, or if the pump is oper­
ated against a closed discharge valve for an ex­
tended period of time.
Do not start the pump more than 6 times
per hour. If the motor does not cool be­
tween starts it will overheat, resulting in
damage to the motor windings.
Check the oil level(s) as indicated in the following
LUBRICATION section.
COLD WEATHER PRESERVATION
Do not attempt to thaw the pump by us­
ing a torch or other source of flame. This
could damage gaskets, O‐rings or heat
the oil in the seal housing above critical
temperatures, causing the pump to rup­
ture or explode.
The pump will not freeze as long as the casing is
submerged in liquid. If the casing is not sub­
merged, or if the liquid begins to freeze, remove the
pump from the sump or wet well and dry it thor­
oughly. Run the pump for two or three minutes to
dry the inner walls.
If the pump does freeze while it is out of the liquid,
submerge it until thawed; if the liquid is near freez­
ing, the pump must be submerged for an extended
period of time. Check thawing by starting the pump
and checking that the shaft rotates freely. If the
pump remains frozen, allow additional thawing
time before attempting to restart.
If submerging does not thaw the pump, move it
into a warm area until completely thawed.
LUBRICATION
Do not remove plates, covers, gauges,
pipe plugs or fittings from an over­
heated pump. Vapor pressure within the
pump can cause parts being disen­
gaged to be ejected with great force. Al­
low the pump to completely cool before
servicing.
On a new pump, check the oil level in both seal and
motor cavities before initial startup, and drain and
replace the oil after the first 200 hours of operation.
Following this, check the oil level in the seal cavity
after the first two weeks of operation, and every