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| Illustration 1 | g00515651 |
Secondary Steering Schematic (1) Steering cylinders. (2) Priority valve. (3) Supply line to the brakes. (4) Flow switch. (5) Steering and brake pump. (6) Check valve. (7) Secondary steering pump. (8) Hydraulic tank. (9) Metering pump. | |
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| Illustration 2 | g00515873 |
914G Wheel Loader The components for the IT14G Integrated Toolcarrier have the same locations. (1) Steering cylinders. (2) Priority valve. (4) Flow switch. (5) Steering and brake pump. (6) Check valve. (7) Secondary steering pump. (8) Hydraulic tank. (9) Metering pump. | |
The main components of the steering system are hydraulic tank (8), steering and brake pump (5), metering pump (9), steering cylinders (1), secondary steering pump (7), and priority valve (2) .
The hydraulic system has one hydraulic tank. Hydraulic tank (8) is located on the right side of the machine to the rear of the operator compartment. The hydraulic tank (8) supplies oil to the hydrostatic drive, the implement system, the brake boost, the steering system, and the secondary steering system. The secondary steering system is an attachment. One tank port supplies oil to the implement pump and the hydrostatic pump. Steering and brake pump (5) is supplied by a separate tank port.
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| Illustration 3 | g00515874 |
Hydraulic Pump (A) Implement pump. (B) Steering and brake pump. | |
The hydraulic pump is connected to the hydrostatic pump. The hydrostatic pump is connected to the engine flywheel housing. The hydraulic pump is a gear pump and the hydraulic pump has two sections. The implement section is at the drive end of the pump. The steering and brake pump (5) is at the cover end of the pump. The steering and brake pump (5) provides oil for the steering system.
Flow originates at steering and brake pump (5) and the oil flows to priority valve (2). There are three outlets from priority valve (2). The oil from one outlet flows to metering pump (9). The second outlet sends the oil to the brake boost of the master cylinder. The oil flows from the brake boost to hydraulic tank (8), when there is no braking. The third outlet is the signal line from the metering pump (9) .
When the steering wheel is not turned, most of the oil flows to the brake boost of the master cylinder. When the steering wheel is turned, oil flows through metering pump (9). The metering pump (9) meters oil to two steering cylinders (1). This causes the machine to articulate. Full articulation is dampened by rubber articulation stops that are mounted on the frame. Return oil from the metering pump (9) flows to the brake boost of the master cylinder. The oil flows from the brake boost to the hydraulic tank (8).