MAINTENANCE 4.6 LUBRICATION AND MAINTENANCE SCHEDULE REPLACEMENT OF HYDRAULIC HOSE LINES Hydraulic Hose lines are subjected to natural aging. Hence, their usable lifetime is limited to maximum 6 years. The maximum permissible storage time of hydraulic hose lines is 2 years. This storage period is part of the usable life- time and must be considered when a new hose line is being installed. If, for example, a hose line with a one year storage time shall be installed, the remaining service life of the hose line is 5 years. The production year and the ordering number of the hydraulic hose lines is stamped on the hose fittings.
All hydraulic hose lines of the Excavator have to be replaced after every 6 years at the latest, even if there are no visible damages. Repairs on hydraulic hoses and hose lines are not allowed. Use ONLY GENUINE KMG Replacement Hydraulic Hose Lines. INSPECTION OF HYDRAULIC HOSE LINES Inspect all hoses, hose lines and fittings periodically. Check for leaks and damages. Replace damaged parts without delay. Hydraulic fluid escaping under pressure can cause serious inju- ries and fire break out. Some examples of faults on hydraulic hoses requiring replace- ment of the concerned part: G Damages on the outer layer (e.g. chafed spots, cuts or scratches). G Brittle top layers.
Flaws on the hose material G Distortion of the hose line (strong deviation from the original shape) under pressurized and pressureless conditions or when bent, e.g. disintegration of hose layers or blistering. G Leaks G Detachment of hose and fitting. Damaged hose fitting 295 CAUTION WARNING