Control and operation

Working with the machine

–from the uppercarriage

Emergency lowering from the operator’s seat

The emergency shutoff valve in the cab is on the floor below the right control panel.

Danger!

Crushing hazard when lowering the hydraulic cab! Injuries, death.

Make sure that nobody is in the dangerous area.

Set the emergency shutoff valve in position 2 The cab lowers.

When the cab is fully lowered:

Set the emergency shutoff valve back in position 1 The cab can be lifted.

Emergency lowering from the uppercarriage

The emergency shutoff valve on the uppercarriage is at the rear of the cab hydraulic lifting system.

Danger!

Crushing hazard when lowering the hydraulic cab! Injuries, death.

Make sure that nobody is in the dangerous area. Keep your arms and legs away from moving parts.

Set the emergency shutoff valve in position 2 The cab lowers.

When the cab is fully lowered: Set the emergency shutoff valve back in position 1 The cab can be lifted.

Maintenance and repair

Danger!

Crushing hazard from lowering hydraulic cab! Damages, injuries, death.

Before carrying out any maintenance or repair work on the adjustable hydraulic cab: Lower the cab fully.

If the operation requires that the hydraulic cab be in lifted position: Place appropriate support equipment below the cab.

Cab adjustable on sliding rails (option)

With this specific execution, the height adjustable cab can be moved up and down vertically thanks to a height adjusting device moved by chains.

Notice!

The safety recommendations as well the information of the previous paragraphs concerning the cab height adjustment and the emergency lowering from inside the cab remain valid for this particular hydraulically height adjustable cab on sliding rails.

Only the procedure for emergency lowering the cab from the outside is different.

The cab can in this case be emergency lowered via the touch S79 mounted at the rear of the lifting device 15, and not using a shutoff valve as previously described.

Emergency lowering from the outside of the cab: Press the touch S79 and keep it pressed. the driver’s cab lowers due to its own weight, as long as the touch S79 is kept depressed.

Operating the excavator in safety modes

3.5Operating the excavator in safety modes

3.5.1Board E52 for safety mode of Diesel engine & servo control

The safety board E52 is situated at the rear end of the right side control desk. Thanks to this printed board, the excavator can, in case of a failure in the main electronic circuit, be maintained operating temporarily and with some restrictions.

E52 Printed board for safety operation

H11 Warning light / Diesel engine in safety mode

H60 Warning light / operating error on Diesel engine with safety mode turned on

S71 Switch / engine start in safety mode

S72 Switch / RPM selection in safety mode

S73 Switch / servo pressure circuit in safety mode

Starting the Diesel engine in safety mode

In normal operation, the engine is started via the main electronic circuit when the ignition key is turned to start position.

In case the engine can no longer be started or kept running due to troubles in the control electronics, it can be started in safety operation via the starting switch S71

Turn the ignition key in start position and at the same time push the safety start switch S71 to the right.

Keep the switch pushed to the right until the engine starts

The warning light H11 turns on.

The symbol S71a is displayed on the screen. The engine is now operating in safety mode.

Safety operation of the Diesel engine

The engine can also be switched into safety operation automatically, as an example consecutively to a communication default in the control system.

In safety operation, the engine works with reduced output in comparison with the normal operation.

In safety operation the stop of the Diesel engine is achieved just like in normal operation, while turning back the ignition key to the "off" position.

It is not possible to return to normal operation when the engine is running, the rocker switch S71 must be tilted back from safety operation into normal operation (position AUTO) only when the excavator is turned off.

Notice !

In safety operation, the communication between the electronic control box of the engine and the main circuit of the excavator may be no longer possible. The engine operating error codes are in this case no longer displayed on the screen.

The occurence of an operating error of the engine is then indicated as follows:

•the red warning light H60 lights on,

•a buzzer in the cab beginns to sound.

•the error code E525 appears on the monitoring display.

Caution!

In case the warning light H60 lights up, the operator must shut the engine down as soon as possible and recognize which error has occurred

It's the operator's own responsibility to decide if the machine can be maintained operating or not!

In safety operation the following functions remain available:

•the automatic engine power reduction in case of overheating of the engine coolant or of the charge air.

•the memorization of the occurring engine faults into the inner error memory of the control box of the engine.

At the opposite, the following functions are no longer operative:

•the automatic engine shutdown in case of low lube oil pressure.

•the automatic engine shutdown when the maximum permitted coolant or charging air temperature has been exceeded.