Section 7
Electrical System
20425610
5-2005/Rev 0
7-4
Table 7-2
Sensors and Solenoids
Component
Function
Hydraulic Cylinder
5 As pressurized hydraulic oil is sent to one side of
the hydraulic cylinder, it pushes against the
piston, moving it in one direction until it activates
the proximity switch at the end of the stroke. The
hydraulic flow is then sent to the opposite side of
the cylinder, and the piston reverses direction
until it activates the proximity switch at the
opposite end of the stroke.
The green light on the proximity switch indicates
there is power to the switch. The light turns red
when the switch is activated. The proximity
switches are magnetically activated by the
presence of the metallic surface of the piston.
When the switch is activated, it sends a signal to
the controller to change the flow of the
directional control valve and reverse direction.
High Pressure Safety Dump Valve
6 When control power is removed, the optional
safety dump valve releases the stored pressure in
the intensifier and high pressure delivery lines.
The high pressure dump valve assembly includes
a normally open high pressure water valve and a
solenoid operated air valve.
The normally open pneumatic dump valve is held
closed by air pressure. When the air supply is
interrupted, the valve opens and allows water to
flow through the valve. Pressure is released in
the intensifier and the high pressure water stream
exits through the drain.
Low Pressure Water Filter Assembly
7 A temperature switch on the optional water filter
assembly monitors the temperature of the cutting
water from the booster pump.
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