- Load Haul Dump:
- R1700G (S/N: 8XZ1-UP)
Introduction
The supplemental product support literature should be used with the appropriate Service Manual and the appropriate Parts Manual that is available for each standard machine. This supplement is used to determine the difference between the custom modifications and a standard machine.
The Service Manual and the Parts Manual that is available for the standard machine should be used if the service information is not in this supplementary product support literature.
Specifications (Steering System)
Diverter Valve (Steering Release) for S/N:8XZ1-312
Part No.: 9EP2690
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| Illustration 1 | g01296771 |
(1) Torque for valve body ... 50 N·m (37 lb ft)
Pilot switching pressure ... 500 kPa (75 psi)
Diverter Valve (Steering Release) for S/N:8XZ313-UP
Part No.: 9EQ2934
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| Illustration 2 | g01326544 |
(1) Torque for valve body ... 50 N·m (37 lb ft)
Pilot switching pressure ... 500 kPa (75 psi)
Systems Operation Section (Steering System)
Diverter Valve (Steering Release) for S/N:8XZ1-312
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| Illustration 3 | g01296773 |
The steering release diverter valve is mounted on the steering control valve. The steering control valve is located on the rear frame behind the articulation hitch.
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| Illustration 4 | g01296772 |
(1) Port from left steer (2) Port from towing brake release cylinder (3) Port from right steer (4) Spool | |
The steering release diverter valve allows oil flow between the rod end and the head end of the steering cylinders when the steering release diverter valve is activated.
Pressure oil from the towing brake release cylinder flows to port (2) and moves spool (4) to the left. Oil can now flow between port (1) and port (3) .
Diverter Valve (Steering Release) for S/N:8XZ313-UP
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| Illustration 5 | g01277893 |
The steering release diverter valve is mounted on the steering control valve. The steering control valve is located on the rear frame behind the articulation hitch.
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| Illustration 6 | g01276243 |
(1) Port from left steer (2) Port from towing brake release cylinder (3) Drain port (4) Port from right steer (5) Spool | |
The steering release diverter valve allows oil flow between the rod end and the head end of the steering cylinders when the steering release diverter valve is activated.
Pressure oil from the towing brake release cylinder flows to port (2) and moves spool (5) to the left. Oil can now flow between port (1) and port (4). Drain port (3) allows leakage from the spring chamber to drain to the hydraulic tank.
Systems Operation Section (Braking System) for S/N:8XZ1-290
Steering Release
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| Illustration 7 | g01293972 |
Hydraulic schematic for the braking system (1) Steering cylinder (2) Steering cylinder (3) Steering cylinder crossline relief valve (4) Steering cylinder crossline relief valve (5) STIC steering pilot control valve (6) Implement and steering neutralizer valve (7) Towing brake release cylinder (8) Pressure tap for the towing brake release system (9) Front wheel brakes (10) Pressure tap for the front service brake circuit (11) Secondary steering diverter valve (12) Secondary steering pump (13) Steering control valve (14) Steering release diverter valve (15) Check valve (16) Towing brake release sequence valve (17) Connection for recovery hook type brake release system (18) Rear brake accumulator (19) Front brake accumulator (20) Pressure tap for the steering system (21) Spool (22) Service brake pedal (23) Service brake and transmission neutralizer pedal (24) Shuttle valve (25) Check valve (26) Hydraulic oil cooler (27) Line from implement lift circuit (28) Line to ride control diverter valve (29) Parking brake control valve (30) Parking brake oil pressure switch - alert indicator (31) Selector and pressure control valve (32) Check valve (33) Parking brake oil pressure switch - remotes light (34) Primary steering flow switch (35) Check valve (36) Dual pilot check valve (37) Automatic lubrication system connection port (38) Pressure tap for the parking brake and pilot system (39) Service brake control valve (40) Check valve (41) Pressure tap for the rear service brake circuit (42) Rear wheel brakes (43) Steering neutralizer valve for a left turn (44) Steering neutralizer valve for a right turn (45) Vacuum and pressure relief valve (46) Pilot oil pressure reducing valve (47) Portable hydraulic pump quick connect coupler (48) Pressure tap for the brake accumulator charging circuit (49) Service brake low oil pressure switch - alert indicator (50) Service brake low oil pressure switch - brake activation (51) Brake and pilot pump (52) Steering pump (53) Hydraulic tank (54) Hydraulic filters (55) Portable hydraulic pump quick connect coupler (56) Brake accumulator charging valve | |
In the event of a machine fault and the machine must be towed, the optional towing brake release system can be used to release the machine steering.
The steering release is activated by either of two methods: A recovery bar attached to the recovery machine or by a tow line attached to the recovery hook of the disabled machine. Both methods exert an external force on the piston in the towing brake release cylinder.
The steering release system consists of the following components: towing brake release cylinder (7), towing brake release sequence valve (16) and steering release diverter valve (14).
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| Illustration 8 | g01285635 |
(7) Towing brake release cylinder (typical example) | |
Towing brake release cylinder (7) is located on the rear of the machine.
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| Illustration 9 | g01285636 |
(16) Towing brake release sequence valve | |
Towing brake release sequence valve (16) is located on the left side of the rear frame.
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| Illustration 10 | g01296780 |
(14) Steering release diverter valve | |
Steering release diverter valve (14) is mounted on the steering control valve. The steering control valve is located on the rear frame behind the articulation hitch.
When the towing brake release system is activated, oil from towing brake release cylinder (7) is sent to steering release diverter valve (14). The pressure oil from towing brake release cylinder (7) activates steering release diverter valve (14). Steering release diverter valve (14) allows oil flow between the rod end and the head end of the steering cylinders. The machine will articulate freely whilst being towed.
Towing brake release sequence valve (16) ensures that the steering release system is disabled when the engine is running.
Systems Operation Section (Braking System) for S/N:8XZ291-312
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| Illustration 11 | g01296779 |
Hydraulic schematic for the braking system (1) Steering cylinder (2) Steering cylinder (3) Steering cylinder crossline relief valve (4) Steering cylinder crossline relief valve (5) STIC steering pilot control valve (6) Implement and steering neutralizer valve (7) Towing brake release cylinder (8) Pressure tap for the towing brake release system (9) Front wheel brakes (10) Pressure tap for the front service brake circuit (11) Secondary steering diverter valve (12) Secondary steering pump (13) Steering control valve (14) Steering release diverter valve (15) Check valve (16) Towing brake release sequence valve (17) Connection for recovery hook type brake release system (18) Rear brake accumulator (19) Front brake accumulator (20) Pressure tap for the steering system (21) Spool (22) Service brake pedal (23) Service brake and transmission neutralizer pedal (24) Shuttle valve (25) Check valve (26) Hydraulic oil cooler (27) Line from implement lift circuit (28) Line to ride control diverter valve (29) Parking brake control valve (30) Parking brake oil pressure switch - alert indicator (31) Selector and pressure control valve (32) Check valve (33) Parking brake oil pressure switch - remotes light (34) Primary steering flow switch (35) Check valve (36) Dual pilot check valve (37) Automatic lubrication system connection port (38) Pressure tap for the parking brake and pilot system (39) Service brake control valve (40) Check valve (41) Pressure tap for the rear service brake circuit (42) Rear wheel brakes (43) Steering neutralizer valve for a left turn (44) Steering neutralizer valve for a right turn (45) Vacuum and pressure relief valve (46) Pilot oil pressure reducing valve (47) Portable hydraulic pump quick connect coupler (48) Pressure tap for the brake accumulator charging circuit (49) Service brake low oil pressure switch - alert indicator (50) Service brake low oil pressure switch - brake activation (51) Brake and pilot pump (52) Steering pump (53) Hydraulic tank (54) Hydraulic filters (55) Portable hydraulic pump quick connect coupler (56) Brake accumulator charging valve | |
In the event of a machine fault and the machine must be towed, the optional towing brake release system can be used to release the machine steering.
The steering release is activated by either of two methods: A recovery bar attached to the recovery machine or by a tow line attached to the recovery hook of the disabled machine. Both methods exert an external force on the piston in the towing brake release cylinder.
The steering release system consists of the following components: towing brake release cylinder (7), towing brake release sequence valve (16) and steering release diverter valve (14).
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| Illustration 12 | g01285635 |
(7) Towing brake release cylinder (typical example) | |
Towing brake release cylinder (7) is located on the rear of the machine.
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| Illustration 13 | g01285636 |
(16) Towing brake release sequence valve | |
Towing brake release sequence valve (16) is located on the left side of the rear frame.
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| Illustration 14 | g01285637 |
(14) Steering release diverter valve | |
Steering release diverter valve (14) is mounted on the steering control valve. The steering control valve is located on the rear frame behind the articulation hitch.
When the towing brake release system is activated, oil from towing brake release cylinder (7) is sent to steering release diverter valve (14). The pressure oil from towing brake release cylinder (7) activates steering release diverter valve (14). Steering release diverter valve (14) allows oil flow between the rod end and the head end of the steering cylinders. The machine will articulate freely whilst being towed.
Towing brake release sequence valve (16) ensures that the steering release system is disabled when the engine is running.
Systems Operation Section (Braking System) for S/N:8XZ313-UP
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| Illustration 15 | g01285201 |
Hydraulic schematic for the braking system (1) Steering cylinder (2) Steering cylinder (3) Steering cylinder crossline relief valve (4) Steering cylinder crossline relief valve (5) STIC steering pilot control valve (6) Implement and steering neutralizer valve (7) Towing brake release cylinder (8) Pressure tap for the towing brake release system (9) Front wheel brakes (10) Pressure tap for the front service brake circuit (11) Secondary steering diverter valve (12) Secondary steering pump (13) Steering control valve (14) Steering release diverter valve (15) Check valve (16) Towing brake release sequence valve (17) Connection for recovery hook type brake release system (18) Rear brake accumulator (19) Front brake accumulator (20) Pressure tap for the steering system (21) Spool (22) Service brake pedal (23) Service brake and transmission neutralizer pedal (24) Shuttle valve (25) Check valve (26) Hydraulic oil cooler (27) Line from implement lift circuit (28) Line to ride control diverter valve (29) Parking brake control valve (30) Parking brake oil pressure switch - alert indicator (31) Selector and pressure control valve (32) Check valve (33) Parking brake oil pressure switch - remotes light (34) Primary steering flow switch (35) Check valve (36) Dual pilot check valve (37) Automatic lubrication system connection port (38) Pressure tap for the parking brake and pilot system (39) Service brake control valve (40) Check valve (41) Pressure tap for the rear service brake circuit (42) Rear wheel brakes (43) Steering neutralizer valve for a left turn (44) Steering neutralizer valve for a right turn (45) Vacuum and pressure relief valve (46) Pilot oil pressure reducing valve (47) Portable hydraulic pump quick connect coupler (48) Pressure tap for the brake accumulator charging circuit (49) Service brake low oil pressure switch - alert indicator (50) Service brake low oil pressure switch - brake activation (51) Brake and pilot pump (52) Steering pump (53) Hydraulic tank (54) Hydraulic filters (55) Portable hydraulic pump quick connect coupler (56) Brake accumulator charging valve | |
In the event of a machine fault and the machine must be towed, the optional towing brake release system can be used to release the machine steering.
The steering release is activated by either of two methods: A recovery bar attached to the recovery machine or by a tow line attached to the recovery hook of the disabled machine. Both methods exert an external force on the piston in the towing brake release cylinder.
The steering release system consists of the following components: towing brake release cylinder (7), towing brake release sequence valve (16) and steering release diverter valve (14).
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| Illustration 16 | g01285635 |
(7) Towing brake release cylinder (typical example) | |
Towing brake release cylinder (7) is located on the rear of the machine.
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| Illustration 17 | g01285636 |
(16) Towing brake release sequence valve | |
Towing brake release sequence valve (16) is located on the left side of the rear frame.
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| Illustration 18 | g01285637 |
(14) Steering release diverter valve | |
Steering release diverter valve (14) is mounted on the steering control valve. The steering control valve is located on the rear frame behind the articulation hitch.
When the towing brake release system is activated, oil from towing brake release cylinder (7) is sent to steering release diverter valve (14). The pressure oil from towing brake release cylinder (7) activates steering release diverter valve (14). Steering release diverter valve (14) allows oil flow between the rod end and the head end of the steering cylinders. The machine will articulate freely whilst being towed.
Towing brake release sequence valve (16) ensures that the steering release system is disabled when the engine is running.