Sno-Way 26V Series, Инструкция по установке и эксплуатации

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Hydraulic Power Unit
The hydraulic power unit consists of:
12VDC Motor
Hydraulic pump rated at 1.54 GPM @ 1500 PSI
1.35 quart capacity reservoir
Fine mesh intake filter
Filter screens on all outlet ports
The fluid supply line for the pump is submerged in the
hydraulic fluid reservoir and is equipped with a fine mesh
intake filter screen.
The 12VDC motor is protected electrically by a 250 Amp
fuse located between the battery and the motor solenoid.
The hydraulic pump is protected by a system relief valve.
This unit is equipped with a Down Pressure function which
allows the operator to selectively switch the system to
provide additional hydraulic force to the cutting edge of
the plow.
IMPORTANT:
The electric coils, which operate the
solenoid valves, require a minimum of 10.5 volts DC
for proper operation. Lower voltage will cause erratic
operation, or failure to operate.
Hydraulic Controls
The hydraulic controls consist of:
• System pressure relief valve.
• Two crossover relief valves.
• Two wing relief valves.
• Four three-way two position hydraulic valves and
two pilot operated check valves for wing angling
functions.
• Two double acting hydraulic cylinders for wing
angling functions.
• One three-way two position, three two-way two posi-
tion valves and two check valves for raise, lower and
down pressure functions.
• One down pressure relief valve.
Electro-Hydraulic Controls
All hydraulic functions are controlled by the 12VDC
electrical system which actuates coils on the hydraulic
valves and the solenoid for the electric motor of the power
unit. 12VDC power is fed from the battery post of the
motor start solenoid to each coil and the plow control
receiver.
Each valve is actuated by completing a circuit to ground
through the coil, and through the plow control receiver by
means of a wire transmitted signal to the plow control
receiver from the hand-held controller in the vehicle.
NOTE: This is a ground switching system and has power
on the coils as soon as power is connected to the plow.
The receiver module energizes the coils by providing a
ground path to them.
Raise Mode of Operation
Actuating the ’Raise’ switch on the hand-held controller
sends a signal to the plow control receiver on the plow
which then actuates the motor solenoid and the coils for
the ’C’ valve and ’F’ valve.
Figure 1-1
Actuating the start solenoid sends current to the power
unit motor to cause the power unit to pump hydraulic fluid.
Hydraulic fluid, under pressure, is directed through the ’C’
valve to the lift cylinder causing it to extend and raise the
plow. The ’F’ valve is also actuated to allow fluid in the rod
end of the double acting raise cylinder to return to the
reservoir.
When the ’Raise’ switch on the hand-held controller is
released the start solenoid circuit is broken and the motor
stops, the circuit to the coil for the ’C’ valve and the ’F’
valve is broken and these valves got to their normally
closed positions.
F
C
THEORY OF OPERATION