Replacing a planetary gear set in a Ford 555 Tractor Backhoe Loader is a complex task that requires mechanical skill and understanding of heavy machinery. click here for more details on the download manual…..
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This guide will provide a detailed overview of the components involved and the steps necessary to complete the replacement.
### Tools and Equipment Needed
1. **Basic Hand Tools**: Wrenches, sockets, ratchets, and screwdrivers.
2. **Torque Wrench**: For accurate torque specifications.
3. **Hydraulic Jack and Jack Stands**: For lifting the machine safely.
4. **Pry Bars**: To help remove stubborn components.
5. **Bearing Puller**: Useful for removing bearings.
6. **Seal Puller**: For removing seals without damaging the housing.
7. **Clean Rags and Cleaning Solvent**: For cleaning surfaces.
8. **Grease and Lubricants**: For reassembly.
9. **Service Manual**: Specific to the Ford 555 for torque specs and detailed diagrams.
### Components Involved
1. **Planetary Gear Set**: The assembly that includes:
– **Sun Gear**: The central gear that drives the planet gears.
– **Planet Gears**: The gears that revolve around the sun gear and are mounted on a carrier.
– **Ring Gear**: The outer gear that meshes with the planet gears.
– **Carrier**: Holds the planet gears in place and transfers torque.
2. **Hydraulic Motor**: Provides the necessary power to drive the planetary gear set.
3. **Housing**: The case that contains the planetary gear set and keeps everything in alignment.
4. **Seals and Gaskets**: prevent fluid leaks and contain lubrication.
5. **Bearings**: Support the gears and allow for smooth rotation.
### Steps for Replacement
1. **Preparation**
– Ensure the tractor is on a flat, stable surface and turn off the engine.
– Disconnect the battery to prevent accidental starts.
– Use the hydraulic jack to lift the rear of the tractor and secure it with jack stands.
2. **Remove the Backhoe Assembly**
– Disconnect hydraulic lines leading to the backhoe.
– Remove the pins and brackets securing the backhoe to the tractor frame.
– Carefully lift and set the backhoe assembly aside.
3. **Access the Transmission Housing**
– Remove the access panel or cover on the transmission housing to expose the planetary gear set.
4. **Drain Fluid**
– Drain the hydraulic fluid from the transmission to prevent spills and contamination.
5. **Remove the Planetary Gear Set**
– Unscrew any bolts securing the planetary gear set housing.
– Carefully remove the housing to expose the gear set.
– Take note of the arrangement of gears and carriers for reassembly.
– Use the bearing puller if necessary to remove the planet gears and carrier.
– Remove the sun gear and ring gear as needed.
6. **Inspect Components**
– Inspect the sun gear, planet gears, and ring gear for wear or damage.
– Check bearings and seals for signs of wear; replace if necessary.
7. **Install the New Planetary Gear Set**
– Begin by placing the new sun gear into position.
– Install the planet gears onto the carrier, ensuring they mesh properly with the sun gear.
– Attach the ring gear to the housing, ensuring it aligns correctly with the planet gears.
– Secure all components in place with the appropriate fasteners, torquing them to specification.
8. **Reassemble the Transmission Housing**
– Replace any seals
and gaskets before reattaching the housing cover.
– Ensure all bolts are tightened to the required torque specifications.
9. **Reconnect the Backhoe Assembly**
– Reattach the backhoe to the tractor frame, ensuring all pins and brackets are secure.
– Reconnect hydraulic lines, checking for proper connections.
10. **Refill Fluid**
– Refill the hydraulic system with the appropriate hydraulic fluid as per the service manual.
11. **Test the System**
– Reconnect the battery and start the tractor.
– Test the backhoe and planetary gear operation to ensure everything is functioning correctly.
### Final Checks
– **Leak Inspection**: After running the tractor, inspect for any leaks around the seals and gaskets.
– **Function Test**: Operate the backhoe to ensure smooth operation without unusual noises.
### Conclusion
Replacing a planetary gear set in a Ford 555 Tractor Backhoe Loader is a detailed process that requires careful attention to detail and proper reassembly. Always refer to the manufacturer’s service manual for specific torque specifications and additional instructions for your particular model. If you’re not comfortable performing this task, consider consulting a professional mechanic.
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