Control and operation
Operating manual
Operating the excavator in safety modes
Fig. 3-96
Device for emergency supply of the boom cylinders
Connecting an external pressure source The fittings for connection and the shut-off valves of the emergency supply device are installed on the lower part of the boom, on the right side. Loosen the box nut and the taper collet at the T-coupling 8U or 8D and connect the pressure source to the T-coupling. Note When the pressure from the external source increases, the pressure automatically increases in the servo control circuit of the machine, even if the shut off valves 5U and 5D are left in the closed position. Raising the working attachment The external pressure source must be connected to the T-coupling 8U. Move the safety lever to the lower position and turn the ignition key to "contact" position. Open the shut off valve 5U: line up the manoeuvring lever of the valve with the hydraulic line. Carefully actuate the joystick for the boom cylinders in the direction for lifting the working attachment until the attachment has reached the desired position. Lowering the working attachment The external pressure source must be connected to the T-coupling 8D. Move the safety lever to the lower position and turn the ignition key to "contact" position.
copyright by
3 - 112
MJFCIFSS
R 974 C / 10069856
