SAFETY MEASURES DURING MAINTENANCE 11.2.4 PRIOR TO START OF INSPECTION AND MAINTENANCE Prior to start of inspection and maintenance operations, park the machine on solid, even ground. Lower the work unit. Switch off the engine (start switch to position '0') and safeguard the ma- chine. P I 0 II If the engine has to be running during maintenance, e.g. for pressure checks of the hydraulic system, proceed with particular care. Perform such measures with two persons with whom you have arranged clear hand signs beforehand. 75_209 One person must be seated on the driver's seat to ensure that the engine can be immediately switched off, if required.
This per- son must always ask the second person before actuating the control levers. The person performing the maintenance measures must take care not to touch or get caught by moving parts. 11.2.5 SECURING THE ARTICULATED STEER- ING Before starting maintenance, secure the articulated steering against accidental movement using the locking bar (position '2'). 1 2 75_155 11.2.6 SUPPORTING THE WORK UNIT Before work under a lifted work unit is started, the work unit must be supported to ensure safety. For this purpose, use a support block. In addition, set the control lever for the work hydraulic unit to its neutral 'HOLD' position and secure it with the safety lever.
If the area under the boom is to be cleaned and a support has not been erected, the machine must be parked as follows: 1 - Park the machine on even ground. 2 - Apply the parking brake. 3 - Place wheel chocks in front of the wheels to prevent the machine from rolling away. 4 - Lower the cutting edge or the teeth of the completely empty bucket onto the ground. These steps are only permitted for cleaning measures. 37