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| Illustration 1 | g01381193 |
Hydraulic schematic for the steering system (1) Steering cylinders (2) Steering cylinder crossover relief valves (3) Secondary steering pump (4) Steering control valve (5) Steering lockout valve (6) Steering metering pump (7) Secondary steering flow switch (8) Secondary steering diverter valve (9) Secondary steering relief valve (10) Steering system pressure tap (11) Left neutralizer valve (12) Right neutralizer valve (13) Hydraulic tank breather (14) Steering oil filters (15) Line to the hoist pilot circuit (16) Check valve (17) Steering pump (18) Primary steering flow switch (19) Brake and pilot section of the gear pump (20) Automatic lubrication system connection port (21) Pilot circuit pressure tap (22) Line to the parking brake circuit (23) Screen (24) Hydraulic tank (25) Pilot oil pressure reducing valve (26) Pilot oil filters (27) Implement and steering solenoid valve (28) Line from parking brake control valve | |
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| Illustration 2 | g01381206 |
Location of the steering hydraulic system components (1) Steering cylinders (2) Steering cylinder crossover relief valves (3) Secondary steering pump (4) Steering control valve (5) Steering lockout valve (6) Steering metering pump (7) Secondary steering flow switch (8) Secondary steering diverter valve (9) Secondary steering relief valve (11) Left neutralizer valve (12) Right neutralizer valve (14) Steering oil filters (17) Steering pump (18) Primary steering flow switch (19) Brake and pilot section of the gear pump (24) Hydraulic tank (25) Pilot oil pressure reducing valve (26) Pilot oil filters (27) Implement and steering solenoid valve | |
Note: Illustrations 1 and 2 show a machine with the secondary steering system installed. Machines without the secondary steering system will not have secondary steering pump (3) , secondary steering diverter valve (8) , primary steering flow switch (18), secondary steering flow switch (7) and secondary steering relief valve (9) .
The steering hydraulic system is made up of two basic circuits, the pilot circuit and high pressure circuit. The high pressure circuit also incorporates the secondary steering system.
The main components of the pilot circuit are hydraulic tank (24), brake and pilot pump (19), pilot oil pressure reducing valve (25), pilot oil filters (26), left and right neutralizer valves (11) and (12), steering control valve (4), and various lines.
The main components of the high pressure circuit are hydraulic tank (24), steering pump (17), steering control valve (4), steering cylinders (1), steering oil filters (14), and various lines.
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| Illustration 3 | g01408740 |
(14) Steering oil filters (13) Hydraulic tank breather (24) Hydraulic tank (29) Filler cap | |
Hydraulic tank (24) is located on the right side of the machine. Hydraulic tank (24) is the oil reservoir for the hoist hydraulic system, the steering system, the braking system, and the brake cooling system. Steering oil filters (14) are mounted to the front of hydraulic tank (24). Oil is placed into hydraulic tank (24) through filler cap (29). Hydraulic tank breather (13) is mounted to the top of hydraulic tank (24).
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| Illustration 4 | g01410856 |
(19) Brake and pilot pump | |
The hoist, brake and pilot pump is mounted to the pump drive section of the engine flywheel housing. Brake and pilot pump (19) is at the rear of the gear pump.
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| Illustration 5 | g01410847 |
(17) Steering pump | |
Steering pump (17) is mounted to the pump drive section of the engine flywheel housing.
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| Illustration 6 | g01381961 |
(25) Pilot oil pressure reducing valve (26) Pilot oil filters | |
Pilot oil pressure reducing valve (25), and pilot oil filters (26) are mounted to the left side of the front frame, in the transmission compartment.
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| Illustration 7 | g01381962 |
(27) Implement and steering solenoid valve | |
Implement and steering solenoid valve (27) is mounted to the left side of the front frame, in the transmission compartment.
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| Illustration 8 | g01381963 |
(6) Steering metering pump | |
Steering metering pump (6) is mounted to the front of the cab and is located behind the front cover of the cab.
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| Illustration 9 | g01381968 |
(5) Steering lockout valve | |
Steering lockout valve (5) is mounted on the left side of the front frame, in the transmission compartment.
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| Illustration 10 | g01381972 |
(11) Neutralizer valve for a left turn | |
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| Illustration 11 | g01381973 |
(12) Neutralizer valve for a right turn | |
Neutralizer valve for a left turn (11) and neutralizer valve for a right turn (12) are located on the front frame near the upper articulation hitch.
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| Illustration 12 | g01387951 |
(4) Steering control valve | |
Steering control valve (4) is mounted to the front of the transmission.
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| Illustration 13 | g01408752 |
(1) Steering cylinder | |
Steering cylinders (1) are located on either side of the machine articulation hitch.
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| Illustration 14 | g01381978 |
(2) Steering cylinder crossover relief valve | |
Steering cylinder crossover relief valves (2) are located on each steering cylinder.
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| Illustration 15 | g01381980 |
(3) Secondary steering pump | |
Secondary steering pump (3) is mounted to the rear of the output transfer gear case.
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| Illustration 16 | g01408754 |
(8) Secondary steering diverter valve | |
Secondary steering diverter valve (8) is mounted to the right side of the front frame, in the transmission compartment.