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The final drive for the KUBOTA U35-3 excavator is a hydraulic motor and planetary gearbox combination that delivers torque to the track drive sprocket

The final drive system is located on each side of the excavator and is responsible for driving the tracks to move the machine.

The hydraulic motor is a variable displacement axial piston motor that is capable of delivering a maximum displacement of 53.4 cc/rev. It operates with a maximum pressure of 33 MPa and has a maximum speed of 2,300 rpm. The hydraulic motor is connected to the planetary gearbox via a spline shaft.

The planetary gearbox is a two-stage reduction gearbox that is capable of reducing the input speed from the hydraulic motor and increasing the output torque to the track drive sprocket. The first stage of the gearbox has a reduction ratio of 4.5:1, while the second stage has a reduction ratio of 4.5:1. The final reduction ratio of the gearbox is 20.25:1, which is the ratio between the hydraulic motor and the track drive sprocket.

The track drive sprocket is the final component of the final drive system and is responsible for driving the track. The sprocket has a maximum speed of 4.5 km/h and a maximum torque of 12,720 Nm. It is connected to the planetary gearbox via a hub that is bolted onto the final output flange of the gearbox.

The entire final drive system is designed to work in conjunction with the hydraulic system of the KUBOTA U35-3 excavator

The hydraulic system supplies the necessary fluid pressure and flow to the hydraulic motor, which in turn drives the planetary gearbox and the track drive sprocket.

 


 

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