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| Illustration 1 | g01068226 |
Steering System Schematic (1) Return filter (2) Hydraulic oil tank (3) Steering and brake pump (4) Brake valve (5) Metering pump (6) Flow divider valve (7) Steering cylinder | |
The steering system is a complete hydraulically controlled system. The main components of the steering system include the following:
- return filter and pressure filter (1)
- hydraulic oil tank (2)
- steering and brake pump (3)
- brake valve (4)
- metering pump (5)
- steering cylinder (7)
Note: The oil from the steering pump travels to the brake valve. The oil then travels to the metering pump.
The oil flows from hydraulic oil tank (2) to steering and brake pump (3). From the steering and brake pump, oil flows to the hydraulic filter. The oil then flows through flow divider valve (6) of brake valve (4). At the flow divider valve, the oil is divided between the steering and brake systems. Pressure oil then flows to metering pump (5). The oil flows to either steering cylinder (7) or the oil flows through filter (1) to the hydraulic oil tank. This depends on the position of the valve spool.
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| Illustration 2 | g01078503 |
(1) Oil filter (2) Hydraulic oil tank | |
Hydraulic oil tank (2) provides oil for the steering, the brake, and suspension systems. Pressure filter (1) provides clean oil from the metering pump.
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| Illustration 3 | g01068228 |
Rear Of Transmission (3) Steering and brake pump | |
The steering and brake pump is driven off the rear of the torque converter housing.
The steering and brake pump is located under the platform and on top of the transmission.
Note: The oil from the steering and brake pump goes to the filter. The oil then travels to the brake valve. After the brake valve, the oil travels to the metering pump.
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| Illustration 4 | g01068229 |
Metering Pump Under Dashboard (5) Metering pump | |
The metering pump is an open center pump. When the steering wheel is not turned, the open center allows oil flow through metering pump (5) and return filter (1) to hydraulic oil tank (2).
The oil flow for a right turn does not sense the oil flow for a left turn. This means that there is no reaction on the steering wheel. This maintains the original position of the wheel.
Metering pump (5) will provide manual steering if the oil flow from the pump fails. In this situation, the metering pump functions as a hand pump. Steering of the compactor is maintained until the machine can be stopped.
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| Illustration 5 | g01068230 |
Steering Cylinder Location (7) Steering cylinder | |
Steering cylinder (7) is located in the middle front of the machine above the front wheels.
When the steering wheel is turned, steering cylinder (7) receives oil from metering pump (5) so that the machine can make the desired turn. When the steering wheel is not being turned, oil flow returns through metering pump (5) and return filter (1) to hydraulic oil tank (2).