SOLENOID VALVES
Hydraulic valves are simple in concept and all have
the same basic function: Control the direction of oil
flow. Three types of Solenoid Valve is used on the
models E-60, E-60H.
Each Solenoid Valve consists of two components: the
Cartridge and the Coil.
Cartridge
The Cartridge consists of the hydraulic valve
mechanism and an armature which enables the
valve mechanism to be operated and controlled
electrically. The Cartridge is designed to screw in
and out of the Quik-Lift
®
units much like the typical
“spark plug”.
Coil
The Coil is the electrical component which operates
the Cartridge’s valve mechanism by producing
magnetism which pulls the Cartridge’s armature
toward it. Since the armature is connected to the
valve mechanism’s only moving part, it is pulled
by the armature.
Figure 1-3 illustrates the typical Coil. Whenever
electrical current flows to the Coil, it flows through
the winding, which consists of numerous turns
of copper wire. The flow of current through the
winding produces a magnetic field which pulls the
soft iron armature further into the Coil.
The armature pulls the valve spool or poppet
valve into its alternate (energized) position. Not
illustrated is an integral coil spring, which is
compressed when the armature is pulled by the
magnetism.
When the current flow ceases, the magnetic
field disappears and the compressed coil spring
pushes the armature back to its original (de-
energized) position.
FIGURE 1-3
COIL
VALVE SPOOL
WINDING
ARMATURE
“A” Solenoid Valve
The “A” Solenoid Valve is used in the E-60 and E-60H.
These Cartridges contains a poppet valve whose
static or de-energized position is closed. Its energized
position is open.
On both models, the “A” Solenoid Valve retains
hydraulic fluid in the lift cylinder. It is energized
(opened) to allow the hydraulic fluid to flow from the
lift cylinder back to the reservoir, enabling the plow
to lower by gravity.
The “A” Solenoid Valve is designed to remain
energized (open) while the plow is lowered, plowing
snow. This is the “float” feature which insures that the
plow maintains contact with the ground contour.
“B” Solenoid Valve
The “B” Solenoid Valve is used on the Quik-Lift
®
models E-60 and E-60H. The “B” Cartridge contains
a spool valve whose static (de-energized) position
allows the pressurized hydraulic fluid to flow to the
“C” Solenoid Valve. In the energized position, the
pressurized hydraulic fluid is diverted to the lift
cylinder, raising the plow.
“C” Solenoid Valve
The “C” Solenoid valve is used on the Quik-Lift
®
models E-60 and E-60H. The “C” Cartridge contains
a spool valve whose static (de-energized) position
allows the pressurized hydraulic fluid to flow to the
right power angling cylinder which angles the plow to
the left. At the same time, it allows the hydraulic fluid
being forced from the retracting left power angling
cylinder to flow through the “C” Cartridge back to the
reservoir.
In the energized position, the pressurized hydraulic
fluid is diverted to the left power angling cylinder,
angling the plow to the right. Also, the hydraulic fluid
being forced from the retracting right power angling
cylinder flows through the “C” Cartridge back to the
reservoir.
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QUIK-LIFT® UNIT COMPONENTS CONT.
