Note: In some countries that require lock valves for agricultural and material handling applications, the ride control must be turned to the OFF position. The ride control must be turned to the OFF position in order for the lock valves to function properly. Lock valves and ride control cannot function at the same time.
Refer to Operation and Maintenance Manual, SEBU6873-04.
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| Illustration 1 | g00579223 |
(1) Accumulator for the ride control, (2) Solenoid for the ride control, (3) Supply to the next valve, (4) Signal oil from the previous valve, (5) Line to the tank, (6) Signal oil to the priority valve, (7) Supply line from the priority valve, (8) Pressure switch for the ride control, (9) Lift cylinders and (10) Line to the tank | |
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| Illustration 2 | g00568425 |
(1) Lift cylinder, (2) Accumulator, (3) Solenoid valve and (4) Pressure switch | |
The main components of the ride control system are lift cylinders (1), accumulator (2), solenoid valve (3), pressure switch (4) and ride control switch (5).
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| Illustration 3 | g00568418 |
(2) Accumulator, (3) Solenoid valve and (4) Pressure switch | |
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| Illustration 4 | g00568423 |
(5) Switch for the ride control | |
Pressure switch (4) senses the pressure in the line to the rod end of the loader lift cylinder. When the pressure in the rod end of the loader lift cylinder is less than the actuation pressure of pressure switch (4), the switch closes.
When the ride control solenoid is energized, the head end of the loader lift cylinder is connected to the ride control accumulator. The rod end of the loader lift cylinder is open to the tank.
Pressure switch (4) overrides the switch for ride control (5). The pressure switch will not allow the ride control to come on, if down pressure of the loader is sensed. This prevents the machine from dropping, when the machine is up on the front bucket, and when ride control switch (5) turned on.
Solenoid valve (3) is located on the frame that is for the right side of the machine. The accumulator (2) is also mounted on the frame.
Ride control switch (5) is located on the right side of the dash.
The switch controls the solenoid in solenoid valve (3) .
Turn ride control switch (5) to the OFF position. The functions of the machine are identical to a machine without ride control.
Turn ride control switch (5) to the ON position. Any downward force that is placed on the lift arms is transferred to the hydraulic fluid at the head end of lift cylinders (1). Any shock load that is placed on the lift arms is transferred to the hydraulic fluid at the head end of lift cylinders (1) .
System pressure on the head end of the cylinder is now open to the accumulator through the solenoid valve.
Because the hydraulic oil cannot be compressed, the forces are passed through the hydraulic lines to accumulator (2). The accumulator piston separates the hydraulic oil from the nitrogen gas. Nitrogen gas compresses. The nitrogen gas resembles a spring. The force in the fluid is transmitted to the piston and the force is then transmitted to the nitrogen gas. As the nitrogen gas compresses, the nitrogen gas allows the volume of fluid that is displaced from the lift cylinders to minimize the shock to the machine components.