Y-1 Service data

There is a case that the appearance and so on differ from the parts for this crane. Although there is not so much difference in functions and disassembly procedures, make sure of the serial number of this crane and the part sales unit described in the parts catalog before starting disassembling operations.

1. Set pressure

2. Hydraulic units

1. Swing motor

Displacement : 25.0 cm3 / rev (1.52 in3/rev)

2. Winch motor

Displacement : 24.0 cm3 / rev (1.48 in3/rev)

3. Swing speed reducer

Reduction ratio : 30 : 1

4. Winch speed reducer

Reduction ratio : 20.4 : 1

3. Hydraulic circuit

Pressure setting

Pressure adjustment

Conditions : Oil temperature 45 to 55℃ (113-131 oF)

1. Control valve (Relief valve RV1)

Connect a pressure gauge to the PG port of the control valve. Measure the pressure with the jack cylinder fully retracted and the control lever placed in the retracting position.

System Diagrams Contents

Z-2 Electrical Circuit

Electrical Circuit

1. This diagram shown the circuit with the power supply off and the winch overwound.

2. The vehicle circuit shown here is typical. It may differ from the circuit of your vehicle.

3. Color codes in parentheses apply to switches made by Matsushita Electric Works Ltd.