Control and operation

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.

3.4.19Cab adjustable on hoist frame with double parallelogram

Purpose of the cab adjustable with double parallelogram

With this elevation (hoist frame with double parallelogram), the operator's cab can be adjusted forwards and upwards through two positional elements, from its normal resting position against the front edge of the uppercarriage, and also from ground level.

Both positional elements can be controlled independently of each other via the joystick U45 in the operator's cab. These elements are in the following pages designated by: h the emergency exit through the front window. placing any items against it, e.g. a front guard! If a front guard is necessary, it should be arranged so that an emergency exit through the front window is still possible . before starting the engine. on via the both shut-off valves inside the cab. wing movements and for cab lowering movements are functioning and that they react promptly. vements using the control lever before operating the cab elevation . zone of the excavator is not to be tolerated during the adjustment procedure of the cab. e clamshell or the lifting hook. It can be hazardous if the load drops from the clamshell or the lifting hook. could occur during operation of the cab elevation and the lift frame, e.g. collision with parts of the undercarriage or with the load in the clamshell or the lifting hook. sufficient distance at all times between the cab, elevation or other machine parts and electrical overhead cables. ances which must be maintained and do not undertake any jobs where the necessary distance from electrical overhead cables can not be maintained at any time. nder heading "Safe use of machines with tower elevation" before in this manual. able and free of any obstacles. ally only be carried out with the cab retracted and in the upper position, thus. with the uppercarriage side element of the elevation fully raised and the cab side element fully lowered. e with the cab in raised up position is not permitted if the travel routes are not even and free of any obstacles or with inclines or bankings which could affect the stability of the machine. reduce vibrations and swings in the cab as much as possible. Raise the uppercarriage side element completely, and adjust the height with the cab side element. o emergency lowering shut-off valves located in the cab. the hoist frame in an emergency case. a malfunction until the malfunction has been remedied

The 2 stage cab elevation on hoist frame with double parallelogram offers the following advantages: wagons, when working over obstacles, ... .

Note !

On a machine equipped with a cab adjustable on hoist frame with double parallelogram and which is simultaneously fitted with an additional elevation for the uppercarriage (tower 800 mm) it is necessary to use the extremity of a side frame to facilitate the access to the gangway mounted to the right side of the cab.

When lowering the cab to the ground to leave it, slightly swing the uppercarriage to the left and also retract the uppercarriage side element of the elevation so to bring the cab close enough to the front end of the side frame, to allow an easy cab access.

Safe working with a cab adjustable on double parallelogram der heading "Safely getting up" before in this manual.

- via a main block valve that has jammed, or a burst hydraulic hose, release the control lever immediately. Then shut off the diesel engine to cut off the oil supply. The cab will remain in position via the linebreak protection valve.