Gorman-Rupp Pumps 16C2-F4L 1319251 and up User Manual
Page 18
10 SERIES
OM-00725
OPERATION
PAGE C - 3
pump can cause parts being disen
gaged to be ejected with great force. Af
ter the pump completely cools, drain the
liquid from the pump by removing the
casing drain plug. Use caution when re
moving the plug to prevent injury to per
sonnel from hot liquid.
Strainer Check
If a suction strainer has been shipped with the
pump or installed by the user, check the strainer
regularly, and clean it as necessary. The strainer
should also be checked if pump flow rate begins to
drop. If a vacuum suction gauge has been in
stalled, monitor and record the readings regularly
to detect strainer blockage.
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 Section E,
Page 1). If the pump is fitted with a Gorman‐Rupp
double grease lubricated seal, the maximum in
coming pressure must be reduced to 10 p.s.i.
Pump Vacuum Check
With the pump inoperative, install a vacuum gauge
in the system, using pipe dope on the threads.
Block the suction line and start the pump. At oper
ating speed the pump should pull a vacuum of 20
inches (508 mm) or more of mercury. If it does not,
check for air leaks in the seal, gasket, or discharge
valve.
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.
Stopping
Reduce the throttle speed slowly, and allow the en
gine to idle briefly before switching the HAND‐OFF‐
AUTO switch to `OFF'.
If the application involves a high discharge
head, gradually close the discharge
throttling valve before stopping the pump.
After stopping the pump, close and lock the control
panel cover, or disconnect the positive battery
cable to ensure that the pump will remain inopera
tive.
Safety Shutdown System
The unit is equipped with a safety system to auto
matically shut down the engine under certain con
ditions. The engine will automatically shut down:
1. If the engine exceeds its safe operating tem
perature.
2. If the engine oil pressure drops below design
limits.
3. If the engine fails to start within a pre‐set peri
od of time.
4. If the engine speed exceeds the safe operat
ing range.
5. If the engine fan belt breaks.
Lights on the control panel will indicate which of the
safety features has caused the engine to shut
down.
Should any of the safety features cause the engine
to shut down, the cause must be determined and
corrected before putting the unit back into service.
The engine will not restart until the HAND‐OFF‐
AUTO switch has been returned to the `OFF' posi
tion for at least 10 seconds.