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| Illustration 1 | g02964116 |
Hydraulic schematic for the steering and braking system (1) Steering control valve (2) Left steering cylinder (3) Right steering cylinder (4) Steering release diverter valve (5) Brake release cylinder (6) Pressure tap for the brake release system (7) Brake release sequence valve (8) Parking brake control valve (9) Front wheel brakes (10) Steering pilot valve (11) Pressure tap for the parking brake and the pilot system (12) Parking brake oil pressure sensor (13) Reverse steering solenoid valve (14) Rear brake accumulator (15) Front brake accumulator (16) Service brake and transmission neutralizer pedal (17) Service brake pedal (18) Steering system pressure tap (19) Left neutralizer valve (20) Right neutralizer valve (21) Service brake oil pressure sensor (rear) (22) Hydraulic oil cooler (23) Selector and pressure control valve (24) Pressure tap for brake accumulator charging system (25) Service brake control valve (26) Service brake oil pressure sensor (front) (27) Line from the implement lift circuit (28) Brake accumulator oil pressure sensor (29) Hydraulic tank (30) Breaker relief valve (31) Secondary steering diverter valve (if equipped) (32) Check valve (33) Check valve (34) Primary steering flow switch (if equipped) (35) Rear wheel brakes (36) Secondary steering pump (if equipped) (37) Pilot and braking pump (38) Steering pump (39) Implement pump (40) Secondary steering flow switch (41) Hydraulic oil filters (42) Check valve (43) Pilot oil pressure reducing valve (44) Brake accumulator charging valve | |
Note: Illustration 1 shows a machine with the steering and brake release system. Machines without the optional brake release system will not have pressure tap for the brake release system (6), brake release sequence valve (7) and brake release cylinder (5).
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| Illustration 2 | g02964256 |
Location of the braking system components (5) Brake release cylinder (8) Parking brake control valve (9) Front wheel brakes (14) Rear brake accumulator (15) Front brake accumulator (16) Service brake and transmission neutralizer pedal (17) Service brake pedal (25) Service brake control valve (29) Hydraulic tank (30) Breaker relief valve (35) Rear wheel brakes (37) Pilot and braking pump (43) Pilot oil pressure reducing valve (44) Brake accumulator charging valve | |
The braking system has two brake control circuits operating four-wheel brakes on the machine. The service brake circuit and the parking brake circuit.
The main components of the service brake circuit are: hydraulic tank (29), pilot and braking pump (37), check valve (42), brake accumulator charging valve (44), rear brake accumulator (14), front brake accumulator (15), service brake and transmission neutralizer pedal (16), service brake pedal (17), service brake control valve (25), front wheel brakes (9) and rear wheel brakes (35) .
The main components of the hydraulic parking brake section are: hydraulic tank (29), pilot and braking pump (37), check valve (42), pilot oil pressure reducing valve (43), parking brake control valve (8), front wheel brakes (9), rear wheel brakes (35) and various lines.
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| Illustration 3 | g02961536 |
(29) Hydraulic tank (behind guard) (45) Filler cap | |
Hydraulic tank (29) is located in the middle of the right side of the machine behind the hydraulic tank guard. Additional oil is placed into the tank through filler cap (45).
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| Illustration 4 | g02961556 |
(30) Breaker relief valve (29) Hydraulic tank | |
Breaker relief valve (30) is located on hydraulic tank (29).
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| Illustration 5 | g02961557 |
(37) Pilot and braking pump (38) Steering pump (39) Implement pump | |
Pilot and braking pump (37) is part of a three section, vane type pump mounted on the torque converter updrive housing.
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| Illustration 6 | g02964079 |
(44) Brake accumulator charging valve | |
Brake accumulator charging valve (44) is located on the left side of the rear frame.
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| Illustration 7 | g02961616 |
(14) Rear brake accumulator (15) Front brake accumulator | |
Rear brake accumulator (14) and front brake accumulator (15) are located on the left side of the rear frame.
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| Illustration 8 | g02980817 |
(16) Service brake and transmission neutralizer pedal (17) Service brake pedal (25) Service brake control valve (under floor) | |
Service brake pedal (17) and service brake and transmission neutralizer pedal (16) are located on the floor of the operator station. Service brake control valve (25) is located under the floor of the operator station.
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| Illustration 9 | g02980836 |
(43) Pilot oil pressure reducing valve | |
Pilot oil pressure reducing valve (43) is located on the left side of the rear frame.
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| Illustration 10 | g02961576 |
(8) Parking brake control valve | |
Parking brake control valve (8) is located on the left side of the rear frame.