OPERATION AND MAINTENANCE
Page 8 of 20
6.
Return the priming lever to the “RUN” position.
7.
Open the discharge valve if so equipped.
When a PB18 pump is used from draft in below freezing
weather, the following shut-down procedure should be
used:
1.
When pumping is completed and discharge hose dis‐
connected, move the priming lever to the “PRIME”
position to drain the intake and the priming line back
into the water supply.
2.
Disconnect the intake hose. Start the engine and op‐
erate the primer until no more water comes out.
3.
Stop the engine and open the volute drain.
Operating the Pump
The pump performance can be varied by:
1.
Controlling a discharge valve or nozzle. Opening the
valve increases flow and decreases discharge pres‐
sure.
2.
Controlling engine speed via the throttle control. In‐
creasing the engine speed increases the discharge
pressure and flow.
WARNING
!
Pump Overheating.
May cause personal injury or pump damage.
When operating the pump, be sure to open the dis‐
charge valve slightly to prevent the pump from over‐
heating. If the pump runs even for a few minutes
completely closed it may heat the water enough to
scald someone when the valve is opened. Overheating
can damage the seals and other pump parts.
CAUTION
Freezing water hazard.
May cause damage to the pump.
If the pump is exposed to freezing temperatures, drain
all water from pump, lines and accessories.
WARNING
!
Pressure Hazard.
May cause personal injury.
When the pump stops there is no stored pressure but
there could be pressure in the hoses. Use care when
disconnecting hoses and allow any residual pressure
to bleed off before uncoupling.
Pumping from Water Tank
1.
Open valves in piping between water tank and pump
intake, and the discharge valve.
2.
Allow about 30 seconds for water to flow into pump.
Note: Priming the pump may be necessary under
some conditions because of the air trapped in
pump and piping.
3.
Adjust engine speed and discharge nozzle or valve to
obtain desired discharge pressure and flow.
CAUTION
Do not attempt to pump more water than is
available from water tank. Always make sure
the intake pressure gauge reading stays above
zero.
After Pumping
1.
Stop engine.
2.
If pumping anything but clean water, open all valves
and open all drains. Flush entire system with clean,
fresh water for several minutes to remove all traces of
impurities.
3.
Close all drains and install intake and discharge caps.
4.
Operate primer lever to drain any fluid from the prim‐
ing pump.
Pumping from Hydrant or Relay
1.
Start Engine.
2.
Open intake, hydrant and other valves as necessary
to allow water to enter the pump.
CAUTION
Pump has a mechanical seal, limit intake
pressure to 75 psi if possible. Although the
pump will operate properly with higher intake
pressure, such operation will greatly acceler‐
ate mechanical seal wear.
3.
Open the discharge valve and increase engine speed
to obtain desired discharge pressure and capacity.
CAUTION
Do not attempt to pump more water than is
available from the hydrant or relaying pumper.
Make sure the intake pressure gauge reading
stays above zero. Some fire departments
operate at a minimum intake pressure of 10
psi when pumping from hydrant or in relay to
prevent a “soft” intake hose from collapsing.
