12 unigreen4.4.5 HYDRAULIC CONNECTION TO THE DISTRIBUTORSThe machines that need a hydraulic connection to drive the herbicide boomsare equipped with 1/2", “Push-Pull”, quick-fit male couplings. You can connectthe pipes by simply pushing them in, making sure you:- proceed only with the engine turned off;- lower any tools connected to the elevator of the tractor;- carefully clean the two parts that will be coupledWarning: the hydraulic cylinders used are the “Double Effect” type.Consult the use and maintenance manual of the tractor.4.5 CARDAN SHAFTIn some models this is supplied on request.The cardan shaft must bear the CE mark.It must always have its own instructions that must be followed scrupulouslyand it should come with a cover bearing the mark, integrated in every part.You should have previously checked the length to avoid:= if it is too long, DANGEROUS THRUST ON THE PUMP SHAFT= if too short, the POSSIBILITY OF DANGEROUS BREAKAGESTHE MINIMUM OVERLAP OF THE TWO TELESCOPIC TUBES MUSTNEVER BE LESS THAN 1/3 OF THE LENGTH OF THE TUBES.The power that can be transmitted by the cardan shaft must be at least equalto that required to run the sprayer. Consider that the power necessary to run asprayer without the fan is practically the same as that of the pump, the powerrating can be found in the pump instructions handbook. Generally 20 barpumps need 20 hp; 50 bar pumps need 30 hp. These power ratings can befound in tables N° 12 pages 33-34.NEVER USE THE CARDAN TRANSMISSION IF THE FOLLOWINGPROTECTIVE COVERS ARE MISSING:a) TRACTOR POWER-TAKEOFF PROTECTIVE COVERb) CARDAN SHAFT PROTECTIVE COVERc) FIXED PROTECTIVE COVER ON THE PUMP SHAFTd) Hook any safety chains to solid anchor pointse) Check that the button or ringnut “E” (FIG. 4) is correctly engaged andblocked both on the pump side and on the tractor side.f) Don’t exceed an inclination of 30°-35° in any direction for any reasong) With the machine stopped, periodically grease the spiders and the pipes,keeping the connecting zone particularly clean.h) Avoid letting the end of the cardan shaft come into contact with the groundwith the machine stopped; use the relevant support on some versions for this,if your machine has no support, hook the external safety chain to a part of theframe of the machine (ex. control unit support).FIG. 4