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Glossary of Terms
Debris Tank – Collects all debris removed from the road surface through the vacuum hose.
Dirt Shield – Threaded at washer that protects the lower radial bearing of the thru-shaft from dirt
and debris.
Diverter Valve – Safety feature on the ultra-high pressure pump that recirculates water to the blast
head or back to the clean water tank.
Double blast head design – Allows two heads to be mounted on the hog arm and operate simul-
taneously
Felt Gasket – Attaches to the dirt shield to protect the shroud from damage while the spray bar is rotating.
Fill Connection – Located on the driver side of the truck and accommodates large hoses to ll the
water tank.
Fill Hose – Hose used to connect ll connection to clean water source.
Fill Valve – Valve that accommodates large hoses used for lling the clean water tank.
Flapper – Installed on the top of the silencer to keep water and debris from entering the system.
Float Mode – Releases up or down hydraulic pressure on the hog arm to allow the hog head assembly
to oat over uneven surfaces to avoid damage to the blast head.
Forward Tank – Tank on the truck chassis reserved for the clean water tank.
GPM – Gallons per minute of water produced by the ultra-high pressure pump.
Head Rotation Speed Dial – Controls the speed of the blast heads when operating in manual mode.
Hg – Symbol that indicates inches mercury. Used to measure vacuum air ow. Maximum vacuum is -7psi
Hog Arm – 5-axis arm that raises, lowers and moves the blast heads right and left.
Hog Head Assembly – Attaches to the front of the chassis and consists of the hog arm, spray bar,
shroud, wheels and casters.
Holding Tank – Area below the debris tank that catches the recovered water that drains from the
100 micron debris bag.
Impeller – The rotating internal component in a pump or blower that moves the water or air.
Inlet Port On Debris Tank – Receives water and debris from the vacuum hose connected to the shroud.
Joystick Console – Console in the cab of the truck that houses the joystick, start/stop button, head
rotation speed dial, truck speed dial, and digital high pressure and charge pressure gauges, oat and
forward rocker switches.
Kunkle Valves – Vacuum safety relief valve that opens when there is excessive vacuum.
Manhole – Opening on the top of each clean water tank that provides access to the interior of the
tank. This should always remain locked.
Manual Bypass Valve – Manual adjustment valve that releases small amounts of water back to the
clean water tank to adjust pressure
Manual High Pressure Gauge – Manual gauge on the UHP pump that displays the operating pres-
sure of the pump.
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