MAINTENANCE 4 Replace Hydraulic Tank Oil Filter --- every 300 hours Demolition front attachment equipped machines (Option- al) In case the hydraulic filter indicator on the monitor panel comes ON, immediately replace the filter element even if machine operating hours are shorter than the filter element replacement interval of 300 hours. CAUTION: Hot hydraulic oil may spout immediately after operation, possibly causing scalding. Start working on only after the hydraulic oil cools. SA-039 IMPORTANT: Oil changing interval depends on the brand of hydraulic oil and the type of filter element to be used and the frequency the front at- tachment is in operation. IMPORTANT:
Information on Filter Element: 1. A high performance element (micro glass) is used as the hydraulic tank oil filter for the demolition front attachment equipped machines (optional). Use the same type of a high performance element when replac- ing the element. In case a paper element is unavoidably used, change hydraulic oil and replace the hydraulic tank oil filter in accordance with the instruction for “Change hydraulic oil and replace the hydraulic tank oil filter” in the Operation section. 2. In case the same paper element is used as those used on the standard models, the filter restriction warning system does not function. Insulate the cable of warning de- vice (7).
7 1 2 4 2 3 1 Replacement procedures 1. Park the machine on solid and level ground. Fully extend the bucket cylinder, fully retract the arm cylinder, and lower the bucket to the ground. Stop the engine. 2. Before replacing the element, be sure to release air pres- sure from the hydraulic oil tank by pressing the air bleed valve on the hydraulic oil tank. 5 3. Loosen bolts (1) (6 used) to remove cover (2) and O-ring (3). When removing cover (2), spring (4) may fly out. While pressing cover (2) downward, slowly remove cover (2). 4. Remove spring (4) and element (5). 5. Replace element (5) and O-ring (3) with new ones. Install them in the hydraulic oil tank. 6.
Install cover (2) with bolts (1) (6 used). Tightening torque: 50 N•m (5.1 kgf•m, 37 lbf•ft) M175-07-035 7-44