196 Maintenance and serviceCAUTION: to perform maintenance of the machine, always switch it off. Always wear a maskand safety goggles while performing the maintenance of machine.6.1 Maintenance of the machineTo ensure a long-term quality from the cutting with the CS 451, please follow the maintenanceplan below:Regular service periodPerform at everyindicated periodAfter one hour of workBeginning of the dayDuring tool changeEnd of the dayOnce a weekAfter a failureAfter a damageVisual control (generalaspect, sealing)Whole machineCleanFlange and blade fixing devices CleanBelt tension ControlWater hoses and nozzles CleanDepth screw GreaseEngine housing CleanReachable nuts and screws Tighten upAdjustment and replacement of the beltAfter one hour of work, the belt heats up and stretches. Therefore, you have to re-tighten it.To adjust the belt, firstly remove the belt guard by unscrewing the 4 nuts. Loose the 4 enginebolts and shift the engine by using the two screws on the front. Then tighten the 4 bolts.To replace the belt, move the engine completely to the front. Adjust the belt and retighten it byshifting the motor to the rear. Then tighten the 4 bolts.LubricationThe CS 451 uses life-lubricated bearings. Therefore, you don’t need to lubricate them at all.Grease the depth screw once a week.Cleaning of the machineYour machine will last longer if you clean it thoroughly after each working day.