Replacing an excavator's plunger pump requires careful planning and execution. Below is a general step-by-step guide to help you understand the process. Keep in mind that specific procedures may vary depending on the make and model of excavator, so it is imperative to consult the manufacturer's instructions or seek professional help when making a replacement. 1. Preparation: - Make sure the excavator is turned off and parked on a level surface. - Enables safety features such as engaging the parking brake and disconnecting the battery. - Gather the tools and equipment needed for the replacement, which may include wrenches, sockets, hydraulic fittings, torque wrenches, safety glasses, and gloves. 2. Drain the hydraulic system: - Locate the drain plug or valve on the hydraulic system and place a suitable container under it to collect the hydraulic fluid. - Open the drain plug or valve to allow the hydraulic fluid to drain completely. Properly dispose of liquid according to local regulations. 90-R-075-HF-5-BC-60-S-4-S1-D-02-GBA-38-38-30 90R075HF5BC60S4S1D02GBA383830 90R075-HF-5-BC-60-S-4-S1-D-02-GBA-38-38-30 90R075HF5BC60S4S1D02GBA383830 90-R-075-HF-5-BC-60-S-4-C7-D-03-GBA-45-45-26 90R075HF5BC60S4C7D03GBA454526 90R075-HF-5-BC-60-S-4-C7-D-03-GBA-45-45-26 90R075HF5BC60S4C7D03GBA454526 90-R-075-HF-5-BC-60-S-3-S1-D-02-GBA-42-42-30 90R075HF5BC60S3S1D02GBA424230 90R075-HF-5-BC-60-S-3-S1-D-02-GBA-42-42-30 90R075HF5BC60S3S1D02GBA424230 90-R-075-HF-5-BC-60-S-3-S1-C-03-GBA-42-42-24 90R075HF5BC60S3S1C03GBA424224 90R075-HF-5-BC-60-S-3-S1-C-03-GBA-42-42-24 90R075HF5BC60S3S1C03GBA424224 90-R-075-HF-5-BC-60-S-3-C7-D-02-GBA-42-42-24 90R075HF5BC60S3C7D02GBA424224 90R075-HF-5-BC-60-S-3-C7-D-02-GBA-42-42-24 90R075HF5BC60S3C7D02GBA424224 90-R-075-HF-5-BC-60-S-3-C6-D-03-GBA-35-35-24 90R075HF5BC60S3C6D03GBA353524 90R075-HF-5-BC-60-S-3-C6-D-03-GBA-35-35-24 90R075HF5BC60S3C6D03GBA353524 90-R-075-HF-5-BC-60-P-3-S1-E-03-GBA-32-32-24 90R075HF5BC60P3S1E03GBA323224 90-R-075-HF-5-BC-60-P-3-S1-D-03-GBA-23-23-20 90R075HF5BC60P3S1D03GBA232320 90-R-075-HF-5-BB-80-S-4-S1-D-03-GBA-35-35-24 90R075HF5BB80S4S1D03GBA353524 90R075-HF-5-BB-80-S-4-S1-D-03-GBA-35-35-24 90R075HF5BB80S4S1D03GBA353524 90-R-075-HF-5-BB-80-R-4-S1-D-03-GBA-35-35-28 90R075HF5BB80R4S1D03GBA353528 90R075-HF-5-BB-80-R-4-S1-D-03-GBA-35-35-28 90R075HF5BB80R4S1D03GBA353528 90-R-075-HF-5-BB-80-R-4-S1-D-03-GBA-32-32-24 90R075HF5BB80R4S1D03GBA323224 90R075-HF-5-BB-80-R-4-S1-D-03-GBA-32-32-24 90R075HF5BB80R4S1D03GBA323224 3. Disconnect the hydraulic line: - Identify the hydraulic lines connected to the plunger pump. It can be helpful to take a photo or mark the connections for reference while reassembling. -Carefully loosen and remove the fittings or connectors securing the hydraulic lines to the pump. Be aware of any residual pressure in the system as it may cause fluid injection or leakage. - Plug or cap open ends of hydraulic lines to prevent contamination. 4. Remove the old plunger pump: - Locate the mounting bolts that secure the plunger pump to the excavator engine or frame. -Remove the mounting bolts, note their position and length for reassembly. - Carefully disconnect any additional components that may be connected to the pump, such as drive belts or pulleys. -Slide the old plunger pump out of its mounting position, noting its weight and any remaining connections. 5. Install the new plunger pump: -Place the new plunger pump into the mounting location so that it lines up with the bolt holes. - Reconnect any other components that were disconnected during disassembly. - Insert and tighten the mounting bolts to the manufacturer's recommended torque specifications. 6. Reconnect the hydraulic lines: -Reconnect the hydraulic lines to the appropriate fittings on the new displacement pump, making sure the connections are tight and leak-free. - Use new seals or O-rings as recommended by the manufacturer to ensure proper sealing. 90-R-075-HF-5-BB-80-R-4-C7-D-03-GBA-35-35-24 90R075HF5BB80R4C7D03GBA353524 90-R-075-HF-5-BB-80-R-3-C7-E-03-GBA-30-30-24 90R075HF5BB80R3C7E03GBA303024 90R075-HF-5-BB-80-R-3-C7-E-03-GBA-30-30-24 90R075HF5BB80R3C7E03GBA303024 90-R-075-HF-5-BB-80-L-4-S1-D-03-GBA-35-35-24 90R075HF5BB80L4S1D03GBA353524 90R075-HF-5-BB-80-L-4-S1-D-03-GBA-35-35-24 90R075HF5BB80L4S1D03GBA353524 90-R-075-HF-5-AB-80-S-4-S1-E-03-GBA-42-42-24 90R075HF5AB80S4S1E03GBA424224 90R075-HF-5-AB-80-S-4-S1-E-03-GBA-42-42-24 90R075HF5AB80S4S1E03GBA424224 90-R-075-HF-5-AB-80-S-3-C7-D-03-GBA-23-23-24 90R075HF5AB80S3C7D03GBA232324 90R075-HF-5-AB-80-S-3-C7-D-03-GBA-23-23-24 90R075HF5AB80S3C7D03GBA232324 90-R-075-HF-5-AB-80-R-4-S1-D-04-GBA-35-35-24 90R075HF5AB80R4S1D04GBA353524 90R075-HF-5-AB-80-R-4-S1-D-04-GBA-35-35-24 90R075HF5AB80R4S1D04GBA353524 90-R-075-HF-5-AB-80-R-4-S1-C-03-GBA-35-35-24 90R075HF5AB80R4S1C03GBA353524 90-R-075-HF-5-AB-80-R-3-S1-D-03-GBA-35-35-24 90R075HF5AB80R3S1D03GBA353524 90R075-HF-5-AB-80-R-3-S1-D-03-GBA-35-35-24 90R075HF5AB80R3S1D03GBA353524 90-R-075-HF-5-AB-80-P-4-S1-D-03-GBA-35-35-24 90R075HF5AB80P4S1D03GBA353524 90R075-HF-5-AB-80-P-4-S1-D-03-GBA-35-35-24 90R075HF5AB80P4S1D03GBA353524 90-R-075-HF-5-AB-80-P-4-C7-D-00-GBA-26-26-28 90R075HF5AB80P4C7D00GBA262628 90R075-HF-5-AB-80-P-4-C7-D-00-GBA-26-26-28 90R075HF5AB80P4C7D00GBA262628 90-R-075-HF-5-AB-80-P-4-C6-E-03-GBA-35-35-24 90R075HF5AB80P4C6E03GBA353524 90R075-HF-5-AB-80-P-4-C6-E-03-GBA-35-35-24 90R075HF5AB80P4C6E03GBA353524 7. Refill the hydraulic system: -Refer to the manufacturer's specifications to determine the proper type and amount of hydraulic fluid required. - Slowly replenish the hydraulic system with the recommended fluid using a funnel or pump to avoid spillage. - Check fluid levels and top up as necessary according to manufacturer's guidelines. 8. Test and inspection: -Start the excavator engine and run it at idle speed to circulate the hydraulic oil. - Check the new plunger pump and hydraulic system for leaks, unusual noises, or abnormal operation. - Conduct a thorough functional test including operating the various hydraulic functions of the excavator to ensure the pump is functioning properly. 9. Exhaust the hydraulic system: - After installing a new displacement pump and refilling the hydraulic system, it is very important to remove all air from the system. - Refer to the excavator's operator's manual or manufacturer's instructions for specific deflation procedures. - Typically, the process involves operating hydraulic functions in a specific sequence to purge air from the system. This ensures proper operation and prevents damage to the pump and other components. 10. Double check the connections and tighten the bolts: - Carefully inspect all hydraulic line connections, fittings and bolts to ensure they are properly tightened before replacing. -Verify for loose connections that could cause leaks or potential failures. 90-R-075-HF-5-AB-60-R-4-S1-D-03-GBA-42-42-24 90R075HF5AB60R4S1D03GBA424224 90R075-HF-5-AB-60-R-4-S1-D-03-GBA-42-42-24 90R075HF5AB60R4S1D03GBA424224 90-R-075-HF-2-NN-80-S-3-S1-E-03-GBA-42-42-24 90R075HF2NN80S3S1E03GBA424224 90-R-075-HF-2-NN-60-P-4-S1-D-03-GBA-42-14-24 90R075HF2NN60P4S1D03GBA421424 90R075-HF-2-NN-60-P-4-S1-D-03-GBA-42-14-24 90R075HF2NN60P4S1D03GBA421424 90-R-075-HF-1-NN-81-L-3-S1-D-03-GBA-42-42-24 90R075HF1NN81L3S1D03GBA424224 90-R-075-HF-1-NN-80-S-4-S1-E-03-GBA-23-23-24 90R075HF1NN80S4S1E03GBA232324 90-R-075-HF-1-NN-80-S-4-S1-E-03-GBA-21-21-28 90R075HF1NN80S4S1E03GBA212128 90-R-075-HF-1-NN-80-S-4-S1-E-03-GBA-17-17-26 90R075HF1NN80S4S1E03GBA171726 90-R-075-HF-1-NN-80-S-4-S1-D-00-GBA-35-35-24 90R075HF1NN80S4S1D00GBA353524 90-R-075-HF-1-NN-80-R-4-S1-E-03-GBA-35-35-24 90R075HF1NN80R4S1E03GBA353524 90-R-075-HF-1-NN-80-R-4-C7-E-03-GBA-35-35-24 90R075HF1NN80R4C7E03GBA353524 90-R-075-HF-1-NN-80-P-3-S1-E-03-GBA-35-35-24 90R075HF1NN80P3S1E03GBA353524 90-R-075-HF-1-NN-80-L-4-S1-E-03-GBA-35-35-20 90R075HF1NN80L4S1E03GBA353520 90-R-075-HF-1-NN-60-S-3-T2-D-03-GBA-35-35-24 90R075HF1NN60S3T2D03GBA353524 90-R-075-HF-1-NN-60-S-3-S1-C-03-GBA-29-29-20 90R075HF1NN60S3S1C03GBA292920 90-R-075-HF-1-NN-60-S-3-C6-D-03-GBA-42-42-24 90R075HF1NN60S3C6D03GBA424224 90-R-075-HF-1-NN-60-R-3-S1-E-03-GBA-38-38-28 90R075HF1NN60R3S1E03GBA383828 90-R-075-HF-1-NN-60-R-3-S1-D-03-GBA-35-35-24 90R075HF1NN60R3S1D03GBA353524 90-R-075-HF-1-NN-60-R-3-S1-D-03-GBA-32-32-20 90R075HF1NN60R3S1D03GBA323220 11. Clean up and dispose of waste: -Properly dispose of any used hydraulic fluid, packaging materials and waste generated during the replacement process in accordance with local regulations. - Clear work area and ensure all tools and equipment are properly stored. 12. Testing and final inspection: -Start the excavator engine and operate the hydraulic functions to verify that the new plunger pump is working properly. -Monitor the run for any signs of leaks, unusual noises, or performance issues. -Final inspection of the plunger pump, hydraulic lines and surrounding components to make sure everything is safe and in good condition. It is important to note that the steps provided are general guidelines only and the exact process may vary depending on the excavator model and manufacturer's recommendations. If you are unsure about any aspect of the plunger pump replacement process, consult your excavator operator's manual or seek professional help.