Rebuilding the transmission on a Komatsu PC1250 hydraulic excavator is a complex task that requires careful planning and attention to detail. click here for more details on the download manual…..

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Mega Machine! Komatsu PC1250SP #excavator #komatsu #heavyequipment Amazing, Excavators, At Work, Heavy Equipment, Heavy Machines, Trucks And Dumpers, Wheel Loaders, Bulldozers In Action, …

Below is a general outline of the steps involved in the transmission rebuild, presented in reverse order. Please note that this is a high-level overview; for detailed instructions, always refer to the official service manuals for the specific model.

### 10. Reinstallation of the Transmission
– Carefully place the rebuilt transmission back into the excavator.
– Secure all bolts and fasteners to the recommended torque specifications.
– Reconnect all hydraulic lines and electrical connections.

### 9. Final Assembly
– Reinstall any covers, shields, or panels that were removed during disassembly.
– Ensure that all components are aligned correctly and securely fastened.

### 8. Testing the Rebuilt Transmission
– Fill the transmission with the appropriate hydraulic fluid.
– Start the excavator and run it through various operational tests to ensure proper functionality.
– Check for leaks and abnormal noises.

### 7. Quality Check and Adjustments
– Inspect all gears, seals, and bearings for proper installation.
– Make any necessary adjustments to the transmission settings.

### 6. Assembly of Transmission Components
– Reassemble the transmission components in the reverse order of disassembly.
– Ensure all gaskets and seals are replaced, and use the appropriate torque specifications for all fasteners.

### 5. Disassembly of the Old Transmission
– Remove the transmission from the excavator by disconnecting hydraulic lines, electrical connectors, and mounting bolts.
– Carefully disassemble the transmission, taking note of the arrangement and condition of all components.

### 4. Preparation for Rebuild
– Gather all necessary tools, replacement parts, seals, and fluids.
– Prepare a clean workspace to prevent contamination of components.

### 3. Troubleshooting and Diagnosis
– Conduct a thorough inspection of the old transmission to determine the cause of failure and ensure all necessary parts are identified for replacement.

### 2. Safety Precautions
– Ensure that the excavator is on a stable surface.
– Engage safety locks and disconnect the battery to prevent accidental starts.
– Wear appropriate personal protective equipment (PPE) throughout the process.

### 1. Refer to Manuals
– Before starting, refer to the **Operation and Maintenance Manual** and the **Field Assembly Instructions** specific to the Komatsu PC1250 models to understand the specifications, torque settings, and other critical information.

### Additional Considerations
– Always consult with a qualified technician or refer to the specific service manual for detailed procedures and safety information.
– Keep a record of all parts replaced and any adjustments made during the rebuild process.

This reverse order summary covers the essential steps for a transmission rebuild on a Komatsu PC1250 excavator. For any specific technical details, please refer to the official service manuals or consult a professional.
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