What is Hydra-Cushion™ Suspension on John Deere 9R 4wd Tractor
Power that doesn’t get to the ground is power that’s being wasted. And a bumpy, hoppy ride can quickly drain an operator’s energy and productivity. So to help you get the most from every horse under the hood and every hour in the cab, 9R Tractors in wheeled configurations are available with the advanced, industry-exclusive HydraCushion suspension
Along with a proven-reliable suspension design, HydraCushion suspension uses an advanced system of electronic sensors and hydraulic components to keep the chassis and front differential vertically centered, giving you more consistent contact with the ground while reducing road lope and smoothing out the bumps that cause a rough, tiring ride.
John Deere HydraCushion suspension has two systems:
- A hydraulic system
- An electrical system
The hydraulic system consists of suspension cylinders, a control valve manifold, suspension lock out, and hydraulic accumulators.
- Accumulators dampen energy from bumps to produce a smooth ride for maximum operator comfort.
The electrical system contains position sensors, solenoids for the control valves, and a master controller for complete automatic control of the HydraCushion system.
How does it work?
The mechanical, hydraulic, and electrical systems work together to maintain a level and vertically centered position of the front differential case in relation to the tractor's chassis, independent of tractor weight or dynamic loading. The system's ability to maintain a vertically centered position provides full suspension travel of 10.2 cm (4 in.). This translates to consistent soil contact for improved power to the ground as well as dampens the energy from bumps that cause a rough ride.
The tractor utilizes electronic and computer controls that monitor tractor functions and axle position. Based on those inputs, the electrical system automatically triggers hydraulic functions to raise, lower, or remain static.
The front axle has been specifically designed to accommodate additional options, such as a front blade or saddle tanks. If using a front blade or saddle tanks and additional front axle supports are needed
The braking system is applied proportionally between the front and rear axle brakes to effectively stop the tractor. There are no operator adjustments or requirements to operate the additional braking system. The braking system uses a waffle pattern that increases the surface area, allowing more control for the operator.
The HydraCushion suspension system is contained within the width of the tractor's frame so it does not affect any tire or ballast configurations.