OPTIONS, ATTACHMENTS 29. HANDLING ECSS (Electronic Controlled Suspension System) Always read this section before using the ECSS in order to enable you to use it safely and effectively. 29.1 STRUCTURE AND FUNCTION OF ECSS The ECSS uses the hydraulic spring effect of the hydraulic accumulator installed to the circuit at the lift cylinder bottom to absorb the vibration of the chassis when the machine is traveling. This enables the machine to travel smoothly at high speed. The ECSS consist of the ECSS switch, travel speed sensor, controller, hydraulic accumulator, solenoid valves and pressure switches.
When the ECSS switch is turned ON, if the travel speed rises to 5 km/h (3.1 mph) or higher, the solenoid valves open, the circuit at the lift cylinder bottom is connected with the hydraulic accumulator, and the ECSS is actuated. If the travel speed lowers below 5 km/h (3.1 mph), the solenoid valves close, the circuit at the lift cylinder bottom is shut off from the hydraulic accumulator, and the ECSS is not actuated. When the ECSS is actuated, the pressure switches automatically open and the close the solenoid valves in accordance with the bucket load to switch the accumulators.
If the bucket is empty, the hydraulic accumulator for travel when empty (1) is actuated; and if the machine is loaded, the hydraulic accumulator for travel when loaded (2) is actuated. This enables the damper to provide the most effective absorption of travel vibration both when traveling empty and when traveling loaded. WA450-3MC 5-7