Baroness LM551, Руководство по обслуживанию, Страница: 49 / 213

Gear motor
The gear rotates with the force of hydraulic
pressure supplied from the hydraulic
pressure pump, to convert rotation motion to
rotate the reel cutter.
It is installed on each mower unit.
Up/down cylinder
The shaft extends/retracts with the force of
hydraulic pressure supplied from the
hydraulic pressure pump, to convert
reciprocating motion to raise and lower the
mower unit.
It is a single-acting cylinder.
It is installed on each mower unit.
Stack valve
This valve controls the up/down of the
mower unit.
The valve circuit switches with use of the
operation lever.
The up/down cylinder retracts with the force
of hydraulic pressure of the up operation,
which raises the mower unit.
The circuit opens with the down operation,
and the up/down cylinder extends with the
weight of the mower unit to lower the mower
unit.
It is located in the operation panel on the
right side of the seat.
Front wheel motor, right
The output shaft rotates with the force of
hydraulic pressure supplied from the piston
pump to rotate the wheel.
It is located on the front right wheel.
This motor is for the front right wheel.
Front wheel motor, left
The output shaft rotates with the force of
hydraulic pressure supplied from the piston
pump to rotate the wheel.
It is located on the front left wheel.
This motor is for the front left wheel.
Rear wheel motor, right
The output shaft rotates with the force of
hydraulic pressure supplied from the piston
pump to rotate the wheel.
It is located on the rear right wheel.
This motor is for the rear right wheel.
Rear wheel motor, left
The output shaft rotates with the force of
hydraulic pressure supplied from the piston
pump to rotate the wheel.
It is located on the rear left wheel.
This motor is for the rear left wheel. 1.
2.
3.
4.
5.
6.
7.
Gear pump
The gear rotates with the engine rotation, to
discharge hydraulic oil to the hydraulic
circuit.
The force of the discharged hydraulic oil
moves the hydraulic equipment.
It is located under the seat.
Gear pump P1: source of power for #2, #3
mower unit reel rotation circuits
Gear pump P2: source of power for #1, #5,
#4 mower unit reel rotation circuits
Gear pump P3: source of power for mower
unit up/down circuit
Gear pump P4: source of power for hydraulic
power steering, and charging the traveling
circuit
Piston pump
The piston reciprocates with the engine
rotation, to discharge hydraulic oil to the
traveling circuit.
The force of the discharged hydraulic oil
moves the wheel motor, so the machine can
drive.
It is located under the seat.
Cross-valve
During forward traveling, this valve allows
the hydraulic oil moving the left and right
front wheel motors to flow to the opposite
side rear wheel motors.
During reverse traveling, the flow changes to
the front two wheels.
It is located between the left and right rear
wheels at the rear of the machine.
Oil cooler
Cools hydraulic oil that has become hot.
It is located behind the radiator at the rear of
the machine.
Steering cylinder
The shaft extends/retracts with the force of
hydraulic pressure supplied from the
hydraulic pressure pump, to convert the
force into reciprocating motion to move the
steering wheels.
The direction of the hydraulic oil supplied to
the cylinder is controlled by the steering
operation.
It is a double-acting cylinder.
It is installed on the inside of the left rear
wheel. 8.
9.
10.
11.
12.
Hydraulic System
LM551
Hydraulic System
Page 4-11
Hydraulic Circuit Configuration