8
DELIVERY VALVES
Screw-Down DIN-Type
By turning the handwheel counter-clockwise, the valve can be opened for the discharge of water.
When the valve is open and no water is being discharged, the valve seal is held against the volute
discharge port by a spring in the valve body.
When the pump is priming, the valve seal acts as a non-return valve so that the prime is not lost.
The release knob allows the valve seal to be lifted higher than normal through the action of the
handwheel being turned with the release knob pulled out.
Note:
This operation is only carried out after the pump has been STOPPED.
This operation will allow the valve seal to be raised above the discharge port and enable water to
drain past the valve from hoses and dry-risers.
PRIMING
An exhaust gas ejector-type priming system is fitted incorporating an automatic priming valve.
The priming system is activated by pulling the primer control rod to the limit of its travel with the
engine throttle approximately 3/4 open.
When priming is complete, the control rod is released and returns to its normal position under the
influence of a return spring.
Discharge of water is then controlled by the position of the engine throttle control and delivery-
valve opening.
FLOODLIGHT UNIT (Optional)
The floodlight is located adjacent to the engine valve cover.
It may be raised to a height of 1,200mm measured from floor level, rotated through 360° and the
actual lamp unit tilted through 90°.
The power-supply cable for the lamp plugs into a socket on the instrument panel.
The socket may also be used for battery-charging purposes.