5-2 Lower Mechanism: Travel Drive Unit 2.
Crossover relief valve The purpose of this valve is to determine the motor drive force and braking force. Therefore, this valve has a shockless function to soften the shock when the motor starts and stops and provide good operability. Also, this valve is formed into one compact unit with the double counter balance valve to make up the brake circuit.
Important
3.
2nd-speed switching mechanism This motor has a 2nd-speed switching mechanism that can switch the motor speed between 2 speeds, low speed and high speed. Automatic 2nd-speed function is also available as an option. Supplement
4.
This relief valve is not designed for hydraulic circuit protection. Install another relief valve to protect the hydraulic circuits.
About automatic 2nd-speed function The low-speed mode fixed position and automatic 2nd-speed position can be selected. When the automatic 2nd-speed position is selected, the motor capacity is selected according to the motor load pressure and the motor is switched automatically between low speed and high speed.
Parking brake The parking brake function is built into the piston motor. When the motor is stopped, the mechanical brake operates to prevent the motor from being rotated by external load.
Important
This brake is not intended to apply braking force when the motor is running. Use of this brake for braking will accelerate disk wear, causing poor braking performance or damage to the shaft. Never use this brake for braking the running motor.
5.
Piston motor A swash plate-type piston motor is used. This piston motor converts the fluid energy of the pressurized oil sent from the hydraulic pump into mechanical energy and outputs high-speed, low-torque power.
6.
Reduction gear A simple planetary 2-stage reduction gear structure of the casing rotation type is used. This reduction gear converts the high-speed, low-torque power output from the piston motor into low-speed, high-torque power and outputs it from the reduction gear casing. Also, a floating seal is used to prevent mud, sand, water, etc. from infiltrating from the outside.
The component devices above are formed into one compact unit that provides high reliability and superior performance.
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