 | |
| Illustration 1 | g00275641 |
This machine has a hydrostatic drive system in order to transfer power from the engine to the tracks. The hydrostatic drive system of the machine eliminates the conventional transmission, the bevel gear, and the drive line components that are found in machines without hydrostatic drive systems. Also, the hydrostatic drive system eliminates the steering clutch and brake arrangement.
In the simplest form, a hydrostatic drive system is best explained as a hydraulic pump with a control system, a hydraulic motor, and high pressure lines carrying oil between these components. The pump converts mechanical power to hydraulic power in the form of oil flow and oil pressure.
In order to meet requirements, the machine must be able to move forward and the machine must be able to move rearward. The machine must be able to turn. The pumps are designed to deliver varying flows of oil. The pumps deliver oil to either the forward or reverse side of the hydraulic motors.
Then, the track can be driven at varying speeds in either the forward direction or the reverse direction.
Because there are two tracks, there are two hydraulic pumps, two sets of hydraulic lines, and two hydraulic motors.
While the machine is operating in a forward direction or reverse mode, the pumps work in conjunction with the motors. The pumps can produce flow to either the forward or reverse sides of the motors, and can vary the amount of flow in either direction in order to produce infinitely variable speed capabilities. In order to turn the machine, each pump is capable of reducing or reversing flow independently. Therefore, one track can be driven at a slower speed or in a reverse direction which causes the machine to turn.
Slowing or stopping the machine is done by reducing or stopping the flow of oil to the drive motors. Braking of the machine is caused by hydrostatic braking of the tracks.
The parking brakes are engaged when the center pedal is fully depressed. The parking brakes are engaged while the transmission is in the PARK position. The parking brakes are engaged while the engine is OFF. When the transmission lever is moved from the PARK position to the desired speed and direction, the machine moves.
The parking brakes are in the final drives. This brake is a spring applied parking brake. This brake is released by oil pressure .
The parking brakes are disabled when the transmission lever is moved from the PARK position. The parking brakes are disabled when the center pedal is released from the fully depressed position with the transmission lever in a FORWARD or REVERSE travel position.
General Operational Safety Tips
Fasten the seat belt at all times.
For prompt stops, quickly depress the center brake pedal or quickly move the transmission lever to the PARK position. Either movement causes an IMMEDIATE STOP.
For all turns on level ground or side hill operations, use the RIGHT steer pedal for right turns and the LEFT steer pedal for left turns.
The brakes are applied while the center pedal is fully depressed. The brakes are applied when the transmission lever is in the PARK position or when the engine is OFF.
DO NOT make quick directional shifts or prompt stops with a raised bucket that is loaded. The bucket should be carried low to the ground while the machine is moving.
Watch for loose material that could fall over the back of a loaded bucket.