OPTIONS, ATTACHMENTS 29.2 METHOD OF OPERATING ECSS The ECSS switch (1) is on the left side of the panel. When the ECSS switch is pressed, it is turned ON, the pilot lamp (2) (orange) lights up, and the ECSS is actuated. If the switch is press again, it is turned off, the pilot lamp goes out, and the ECSS is canceled. It is possible to carry out operation with the ECSS switch kept ON. If the damper is kept ON during operations, and the hydraulic pressure in the circuit at the bottom end of the lift cylinder exceeds 150 kg/cmІ (2130 psi) during operations, the solenoid valves are automatically closed, and the ECSS is canceled to protect the hydraulic accumu- lator from high pressure.
29.3 PRECAUTIONS WHEN OPERATING ECSS SWITCH WARNING If the ECSS switch is turned ON when the machine is traveling or when the work equipment is raised, the hydraulic accumulator for the ECSS is immediately connected to the circuit at the bottom of the lift cylinder, and the oil enters or leaves the hydraulic accumulator in the direction to maintain the balance. This means that the work equipment will move, so be extremely careful when operating the switch. If operations are carried out with ECSS switch kept ON, and the hydraulic accumulator is automatically switched by the action of the pressure switches during operation, the work equipment could immediately move.
Never carry out inspection and maintenance with the ECSS switch kept ON. This is extremely dangerous, as the work equipment could move. Always stop the machine and lower the equipment to the ground before operating the ECSS switch. When carrying out inspection and maintenance, also lower the work equipment to the ground then turn the ECSS switch OFF before starting the maintenance opera- tion. REMARKS If the starting switch is at the OFF position the ECSS will not work even if the ECSS switch is at the ON position. However, if the starting switch is at the ON position it is possible for the ECSS to be actu- ated, so it will switch to the actuation condition if the ECSS switch is turned ON.
The ECSS is not actuated if the transmission is in 1st, less than 5 km/h (3.1 mph). It is actuated when the transmission is in 2nd to 4th, and the accumulator pressure is switched to two levels in accordance with load to absorb the vibration of the chassis effectively. WA320-3MC 5-8