Front Suspension Arrangement
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| Illustration 1 | g00707256 |
(1) Pins (2) Suspension cylinder (3) Front frame (4) Rod (5) Bolts (6) Suspension frame (7) Front axle (8) Pins | |
Front axle (7) is attached to suspension frame (6) by bolts (5). The suspension frame, which is attached to the oscillating hitch, is connected to front frame (3) by suspension cylinders (2) and rod (4) .
Pins (8) connect the suspension cylinders to the suspension frame. Pins (1) connect the suspension cylinders to the front frame. The suspension cylinders are connected to nitrogen charged accumulators that act as springs.
This arrangement allows vertical movement of the axle as the suspension frame pivots about the oscillating hitch. This arrangement also allows vertical movement of one wheel relative to the other wheel.
Suspension Hydraulic System
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| Illustration 2 | g00855225 |
During normal operation, control valves (9) and control valves (10) are closed. This forms two closed systems, each consisting of a suspension cylinder (12), an accumulator (11), and the connecting lines.
When control valves (9) are opened, and the engine is running, oil flows from the piston pump for the brakes into each suspension cylinder and into each accumulator. This procedure is used in order to raise the suspension.
Control valves (10) are connected to the tank. When the control valves are opened, oil from the suspension cylinders and the accumulators drains to the tank. This procedure is used in order to lower the suspension.
When the machine is unloaded, the piston rods of the suspension cylinders are extended beyond the midstroke position. As the machine is loaded, the additional weight pushes the piston rods into the suspension cylinders and oil into the accumulator. This raises the accumulator piston, which causes the nitrogen gas pressure to increase.
When the machine is moving, the suspension frame pivots about the oscillating hitch as the wheels follow the ground contours. The suspension cylinders move continually above the midstroke position and below the midstroke position and oil flows in and out of each accumulator.
The nitrogen gas in the accumulators acts as a spring. The nitrogen gas is compressed when the piston is pushed into the cylinder. The nitrogen gas expands when the load is removed from the suspension cylinders.
Component Locations
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| Illustration 3 | g01007330 |
Control valve (9), control valve (10), and accumulator (11) on the left side of the tractor. | |
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| Illustration 4 | g00754260 |
Control valve (9) and control valve (10) on the right side of the tractor. | |
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| Illustration 5 | g01007331 |
Accumulator (11) on the right side of the tractor is located under a panel. | |