Control and operation

Menu "Purge" - Bleeding of the high pressure fuel system

This menu is only displayed while the diesel engine is stopped. It can be used to start the diesel engine into bleeding mode.

This is necessary if the fuel tank or circuit has been fully emptied. The fully emptied fuel system has to be bleeded manually. Meanwhile it remains air into the high pressure fuel system. This air can only be bleeded on diesel engine starting.

The bleeding mode assume this procedure. Thereby the high pressure fuel system will be automatically bleeded, the diesel engine starts better

Note !

To start in bleeding mode is preconised only in case of running with fuel tank empty or in case of emptying of the fuel system. When starting in mode "Purge", the engine will emit more smoke. As soon as the engine rpm reaches 800 rpm, the menu "purge" is omitted.

Press the menu touch "Purge".

The "Purge" mode is activ (purge = ON).

Start the diesel engine : procedure as seen into chapter Maintenance, Fuel System.

3.1.6Controls and instrumentation for optional equipments

Controls for optional equipments

*The location of these controls may be different, depending on the type of the other installed optional equipments.

This control light lights up if the grease level into the grease container of the centralised lubrication system is located on lowest level. Refill up the grease container, see also the section "To refill a grease container" into chapter 5.

On machines fitted with the special equipment "cooler fan reversible", this control light lights up to indicate that the fan has been changed over to rotation in opposite direction via the push button S160, see also the section "Reversible cooler fan (Optional equipment)" in the chapter "maintenance".

This button turns on the electrical fuel pre heating system,see the section "Starting aids" in this chapter.

When actuating this touch a pressure signal is send to the reversing hydraulic hammer, causing the hammer to change over to the second cycle frequency.

If an hydraulic actuator ( cylinder, hydraulic motor, ) of a special equipment requires a constant oil flow, the speed of the remaining attachment movements can be reduced by depressing the push button S45 (control light inside the button must light).

The necessary oil flow for the hydraulic actuator is maintained, even in case of simultaneous actuation of other attachment movements.

This button turns on and off the control circuit for an optionaly mounted lifting magnet, see "Lifting magnet control system (optional equipment)" in this chapter.

The push button S47 turns on the control circuit for the quick change adapter for the working tool. See also the section "Hydraulic quick change adapter for working tools (optional equipment)" in this chapter.

Actuating this touch makes alive an additional control circuit for a special equipment. The green indicator light in the touch lights up to show that the additional servo control circuit is under pressure.

On some special working attachments, or on attachment showing particular cinematic capacities (as example on industrial attachment), certain movement(s) may be stopped automatically by electrical end switches. The main purpose of this movement limitation is to prevent possible damages due to components frequently reaching their end stops.

See "Cutoff by end switches of attachment movements (option)" in this chapter.

This touch controls the travel parking brake on the machines fitted with a special undercarriage, or on machines mounted on a loading bridge, a wagon, ...

When the red indicator light in the touch lights up, the travel brake is applied. On machines with a standard undercarriage, the travel brakes are controlled directly via the travel pedals and the touch S76 does not exist.

When the touch is depressed, the green indicator light in the touch lights up and an air fan is started to maintain a slight pressurization inside the driver's cab. The entering of dust or not filtered air into the cab is then almost prevented.

S78 - Push button / Height adjustable cab - emergency down

See the section "Height and inclination adjustable cab (optional equipment)" in this chapter.

Should a certain user (cylinder, hydraulic motor, ...) has to be fed with a constant oil flow during the actuation of a special attachment, so the necessary oil flow can be reserved to give priority to this user while depressing the touch S79.The indicator light in the touch is then lighting up.

The velocity of the other simultaneously actuated working movements is correspondingly reduced.

The function of this serially installed touch is described in the section "Greasing the machine - central lubrication" in the chapter "maintenance".

The pause time of the intermittent mode of the cab roof window wiper can be adjusted by turning this button. (The window wiper is switched on and off using the touch S218).

If the touch S98 is actuated, the pressure protection value for lowering the attachment (circuit for retraction of the boom cylinders) is reduced, so to limit the possible downward thrust exerted by the working attachment onto the materials to be dug out.

This safety device must be turned on, as an example, when unloading a boat or a barge, so to avoid damage to its bottom.

On excavators fitted with an undercarriage with adjustable track gauge, this button activate the circuit which controls the adjustment of the undercarriage width.

Thanks to this switch, the operator can control the movement of the additional user of an add on kit AHS either using the double pedal destined for this purpose (key switch in position "pedal")., or via the right joystick (key switch in position "joystick"). See also "Commutation of the control for the user of add on kit AHS" in this chapter.

On machines fitted with the special equipment "cooler fan reversible", the direction of revolution of the cooler fan can be inverted while actuating the push button S160. In some particular working conditions, this inversion of the direction of the fan rotation allows an easy cleaning of the radiator core and of suction area of the fan. See also the section "Reversible cooler fan (Optional equipment)" in the chapter "maintenance".