Maintenance and service90 27.06.2011ver. 25 Maintenance and serviceNOTE!During all work under the drill or where there is a danger of crushing, the drill must becompletely and securely supported. Secure the drill on trestles or stands and lock all liftingrams with their yellow locking devices. See ”3.16 Locking the lifting rams during service” onpage 39.Ensure also that the surface supporting the trestles is firm enough to support them. If the hopperis full, which it ought not to be, the weight of the drill is considerable. See ”7.4 Technical data”on page 135.“Figure 5.4” shows the recommended placement of the trestles.NOTE!The hydraulic system must always be bled following service of the system. Make surethere is nobody in the immediate work area of the machine. Operate the lifting ram, the bout mark-er rams and the pre-implement rams to their end and inner stops a couple of times until all air hasbeen evacuated from the hydraulic systems.Figure 5.1 Figure 5.2 Figure 5.3