• Simple drive system is very reliable.
• No chain drives to maintain, saves time.
• Field proven components are very durable.

Bevel gears transmit engine power smoothly onto the main clutch pulley. The bevel gear housing absorbs loading of the power band and enables the use of a short power band. Hydrostatic drive pump, hydraulic main pump and hydraulic Infinitely Variable Length Of Cut- (IVLOC™) pump are flanged to a carrier housing, adding more reliability.

• Bevel gear housing de-stresses engine.
• Belt tension loading is not transmitted to the engine crankshaft. Long trouble-free engine service life is ensured.
• Requires no maintenance, no belt or chain drive, no wear.

The Multi-disk wet clutch features a large surface area and wear resistant clutch disks for smooth engaging and durability. Clutch is operated with low hydraulic pressure.

• Field proven wet clutch is very reliable.
• 6 inner and 4 outer discs = 10 engaging faces.
• Large surface area provides long service life.
• No maintenance, no adjustments required.

The main power band drives all components other than ground drive. Power band tension is applied through a hydraulic ram whenever the engine is running. This active hydraulic tensioning automatically adjusts the band to provide constant belt tension, even during momentary peak loads. Power band is made of Kevlar-reinforced material.

• Model 7200 uses 4- strand power band.
• Model 7300 uses 5- strand power band.
• Model 7400 uses 6- strand power band.
• Model 7500 uses 7- strand power band.
• Power band is not under tension when the harvester is not in use - longer belt life.
• Automatic belt tensioning reduces belt whip which leads to premature wear.
• Easy to maintain and service for more up time in the field.

The John Deere designed and manufactured three-speed transmission combined with a variable hydrostatic drive provides a wide range of speeds to match all field and road conditions. Two drum brakes can be used as steering brakes, and an independent parking brake ensures safe parking. Heavy-duty final drives transmit the drive power to the wheels, attached to the durable 10-stud wheel flanges

• Very reliable, field proven components ensure trouble-free harvesting.
• Common components with combines facilitate spare parts service.
• Allows excellent turning and smooth accurate team work with trailers.

An electric solenoid mounted on the gear box will activate a mechanical locking mechanism to ensure that the operator will not be able to shift gears whenever ground speed is beyond a certain threshold. Gear lock function ensures that the harvester can always be decelerated through the hydrostatic drive system and not drive downhill with the transmission in neutral. The electronic system of the harvester will implement the ground speed limitation function by requesting lower engine rpm if the front wheel speed sensor is indicating that the ground speed is above a pre defined level. As a result, ground speed cannot go beyond a maximum level even though the multi function lever is in its forward position.

• Safe operation in the field and on the road.
• No operator´s intervention required.
• Reliable control functions at all times.

This hydrostatic motor powered mechanical rear axle features an electronic control unit and a self-engaging differential lock. The rear wheel drive control system will be activated by pressing a foot switch inside the cab. This four-wheel drive system improves operation on hillsides, in muddy maize fields and when pulling heavy forage wagons.

• Four-wheel drive can be used momentarily or left engaged for day long operation.
• Improves productivity in adverse harvesting conditions.
• Requires no operator´s intervention.
• Features limited slip differential
• Smooth engagement

The rear wheels are powered by a variable displacement hydrostatic motor. A control unit controls the proportional hydraulic valve which in turn changes the displacement of the hydrostatic motor. The electronic rear wheel drive system controls the hydrostatic motor for example to increase the speed of the rear wheels providing simultaneously most of the hydraulic power to increase the torque of the front wheels. Decreasing the speed of the rear wheels provides more torque to power the rear axle. By controlling the speed of the rear wheels in a way that the calibrated speed ratio is maintained, the system will implement a hydraulic power shift function between the front and the rear wheels. The direct control of the hydraulic drive power on the rear wheels implements an indirect power control for the front wheels. As a result, the system will assure that in any operating condition, hydraulic power will be available where it is currently needed. This function provides an efficient ant-slippage control.

• Improved traction in deep soil and muddy fields.
• Fully automatic control system relieves the operator of stress and fatigue.
• High performance even when reversing up hill.
• Full control even in steep down hill conditions for assured and confident handling in difficult terrain.