125 Maintenance Section Hydraulic System Oil Filter - Replace Note: The oil must be free of air bubbles. If air bubbles are present in the hydraulic oil, air is entering the hydraulic system. Inspect the hydraulic suction line and the hose clamps. 2. Remove the four bolts (3) from each of the covers (4). Remove both of the covers. 3. Remove the filter elements. Discard the old elements. 15. If necessary, tighten any loose clamps or any loose connections. Replace any damaged hoses. 4. Clean the covers. Inspect the condition of the seals. Replace the seals, if necessary. i01556975 Hydraulic System Oil Filter - Replace 5. Install new filter elements and install the covers.
Tighten the bolts to 58 ± 4 N·m (42.8 ± 2.9 lb ft). 6. Check the level of the hydraulic oil tank. Add oil, if necessary. SMCS Code: 5068-510 NOTICE Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, test- ing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before open- ing any compartment or disassembling any compo- nent containing fluids. 7. Close the platform and install the three bolts. i01561998 Hydraulic System Oil Level - Check SMCS Code:
5056-535-FLV Refer to Special Publication, NENG2500, “Caterpillar Tools and Shop Products Guide” for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose of all fluids according to local regulations and mandates. g00811304 Illustration 206 The hydraulic tank is located on the right side of the machine. Maintain the oil level above the “ADD COLD” mark on sight gauge (2). If necessary, remove filler cap (1) slowly and add oil. g00813398 Illustration 205 The hydraulic oil filters are located in the hydraulic oil tank. The hydraulic oil tank is located behind the platform on the right side of the machine. 1.
Remove the three bolts (2) and swing the platform (1) away from the machine.