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pressure switch will then sense the lowered pressure and
cause the pump to pump fluid into the system and return
it to the proper pressure.
The down pressure system is overridden any time the
plow control is placed in the ’Raise’ mode, but will resume
when placed back into the ’Lower’ position.
Also, note that the ’E’ valve is deactivated anytime an
angle function is activated, but returns to it’s previous
condition as soon as the angle function is completed.
Wing Angling Mode of Operation
Independent Wing Angling
Each wing can be angled forward or rearward
independently by operating the forward or rearward
switch for either the right or left wing.
Operating the right extend switch on the controller will
energize the motor solenoid and the ’A’ coil, which will
allow hydraulic oil under pressure to be directed too the
base end of the right wing cylinder. Operating the right
retract switch on the controller will energize the motor
solenoid and the ’D’ coil, which will allow hydraulic fluid
under pressure to be directed to the rod end of the right
wing cylinder. Operating the left wing extend switch will
perform the same function as the right except that the ’G’
coil will be energized instead of the ’A’ coil. Operating the
left retract switch will perform the same function as the
right retract except that the ’H’ coil will be energized
instead of the ’D’ coil.
Combination Wing Angling
Both wings can be moved together using the control
switches on the controller. Operating the forward
combination switch on the controller will extend both
wings in the ’scoop’ position. Operating this combination
will energize the motor solenoid and both the ’A’ and ’G’
coils.
Operating the rearward combination switch on the
controller will retract both wings into the ’V’ position.
Operating this combination switch will energize the motor
solenoid and both the ’D’ and ’H’ coils.
Operating the right side combination switch on the
controller will extend the left wing and retract the right
wing to plow all snow to the right. Operating this
combination switch will energize the motor solenoid and
both the ’D’ and ’G’ coils.
Operating the left side combination switch on the
controller will extend the right wing and retract the left
wing to plow all snow to the left. Operating this
combination switch will energize the motor solenoid and
both the ’A’ and ’H’ coils.
Each wing angling circuit is protected by a crossover relief
valve set to relieve pressure on the wing angling circuit at
1750 PSI. Each wing also has a relief valve set at 2150
PSI.
Circuit Breaker
A 150 Amp circuit breaker is located near the battery in
the primary 12VDC positive power circuit and is in place
to protect the motor of the hydraulic power unit. A high
amp draw condition will cause the breaker element in the
circuit breaker to interrupt flow to the motor. The circuit
breaker will automatically reset after it cools down.
Summary of Contents for HTV200000
Page 26: ...25 HYDRAULIC SCHEMATIC GRAVITY...
Page 27: ...26 HYDRAULIC SCHEMATIC DOWN PRESSURE...
Page 28: ...27 WIRING SCHEMATIC GRAVITY...