Pumping Flashcards
The pump is fitted with a ____ to help prevent overheating.
thermal relief valve
Air pressure gauges should indicate ___ or greater. Pump may not shift out of road position if the air pressure is below ___.
80 PSI
Engage the pump shift control lever.
Flip pump shift control lever DOWN to engage pump. Wait ___ for pump engagement.
up to 4 seconds
Pump may not engage if gear teeth fail to mesh. In this case:
Shift to N → Shift to R → Shift to N → Shift to D
If the speedometer indicates some value of road speed (_____) AND the vehicle is not moving, the pump is successfully engaged.
approx. 12-18 MPH
Pump Disengagement
WAIT ___ after shifting to NEUTRAL (N) for pump drive shaft to stop spinning.
3-5 seconds
Pump Disengagement
Speedometer should read ___. If the speedometer reads ANY speed e.g. 1-10 MPH or more), then repeat the entire procedure.
0 MPH
The transfer valve may be changed from one position to the other while operating the pump. Slow engine speed to reduce the discharge pressure to ___ or less while changing modes.
75 psi
Tank to Pump:
Allow ___ for water to flood the pump.
30 seconds
Maximum inlet pressure for tank filling is ___
100 psi
Watch tank temperature gauge. When temperature reaches ____, then add fresh cool water or turn OFF pump.
175° F
Open the engine cooler valve to provide more engine cooling when air temperature is above ___, or if engine overheats.
80 degrees F
Drafting:
Immerse intake strainer at least ___ below water surface to prevent pump from drawing air.
two feet
Exercise a transfer valve operation check from pressure to volume modes weekly (Mondays) by
performing the operation ___.
two times.
The operating range of the pressure relief valve is between ___.
70 and 300 psi
