Drag Conveyor Motor
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| Illustration 1 | g01167036 |
(1) Drag conveyor motor (2) Planetary assembly (3) Drag conveyor drive chain (4) Tension adjustment bolt | |
Drag conveyor motor (1) is located between the hydraulic tank and the rear bulkhead. The left side of the machine is equipped with a drag conveyor motor, and the right side of the machine is equipped with a drag conveyor motor. The drag conveyor motors are identical. The rear doors on either side of the machine provide access to the drag conveyor motors.
Drag conveyor motor (1) is a piston motor (fixed displacement bent axis). The output shaft of the motor is splined to planetary assembly (2). The planetary assembly drives chain (3) which drives the drag conveyor.
Drag conveyor drive chain (3) is located inside the chain drive box. Tension adjustment bolt (4) can be used to adjust chain tension.
Auger Conveyor Motor
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| Illustration 2 | g01167038 |
(5) Auger conveyor motor (6) Planetary assembly (7) Tension adjustment bolt | |
Left auger conveyor motor (5) and the right auger conveyor motor are mounted to the rear of the tractor. These motors are identical. The right auger conveyor motor is not shown.
Auger conveyor motor (5) is a piston motor (fixed displacement bent axis). The output shaft of the motor is splined to planetary assembly (6). The planetary assembly drives the chain which drives the auger conveyor.
The auger conveyor drive chain is located inside the chain drive box. Tension adjustment bolt (7) can be used to adjust chain tension.
Cross Section of Motor
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| Illustration 3 | g01167039 |
(8) Valve plate (9) Cylinder block (10) Piston (11) Slipper pads (12) Swashplate (13) Output shaft | |
The drag conveyor motor and the auger conveyor motor are both piston motors (fixed displacement bent axis). The auger conveyor motor has a displacement of 35 cc (2.1 in3) per revolution. The drag conveyor motor has a displacement of 44 cc (2.7 in3) per revolution.
Operation of the Motor
When an auger conveyor or a drag conveyor is operating, supply oil from the corresponding pump enters the motor. Supply oil is directed to the inlet port of the valve plate. The valve plate directs oil into the piston chamber which is in the cylinder block. This pressure forces the pistons which are aligned with the inlet port to move out of the cylinder block.
As the pistons are forced out of the cylinder block, the slipper pads slide along the swashplate. This action causes the cylinder block and the pistons to rotate. Since the cylinder block is splined to the output shaft, the output shaft also rotates.
As the cylinder block rotates, pistons align with the outlet port in the valve plate. Rotation of the cylinder block forces oil out of the piston chambers and into the low pressure side of the closed loop. Low pressure oil is returned to the inlet side of the hydraulic pump. This completes the closed loop circuit.
Note: The material feed motors do not have a flushing valve. Instead, some oil is bled from the reverse circuit and into the motor case drain.