Replacing the trailing arm on a Hitachi EX220-2 excavator requires careful planning and execution to ensure the job is done safely and effectively. click here for more details on the download manual…..
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below is a reverse-order guide to help you understand the steps involved in this process:
### 9. Final Inspection and Testing
– **Inspect the Area**: Ensure that all tools and equipment are removed from the work area.
– **Test the Excavator**: start the excavator and perform a series of tests to ensure that the trailing arm is functioning correctly. Check for any unusual noises or movements.
### 8. Reassemble the Excavator Components
– **Reattach Any Removed Components**: If you had to remove any other parts (like the track or other attachments), reinstall them according to the manufacturer’s specifications.
– **Secure All Fasteners**: Double-check that all bolts and fasteners are tightened to the recommended torque specifications.
### 7. Install the New Trailing Arm
– **Position the New Trailing Arm**: Carefully maneuver the new trailing arm into place.
– **Secure the Trailing Arm**: Attach the trailing arm to the frame using the previously removed bolts and nuts, ensuring that they are tightened to the correct torque specifications.
### 6. Remove the Old Trailing Arm
– **Disconnect the Trailing Arm**: Unscrew and remove the bolts and nuts holding the old trailing arm in place. You may need to use a breaker bar or impact wrench for stubborn bolts.
– **Remove the Old Trailing Arm**: Carefully take the old trailing arm out of the excavator.
### 5. Prepare the Excavator
– **Park on a Level Surface**: Ensure the excavator is parked on stable ground.
– **Secure the Excavator**: Engage the parking brake and place wheel chocks if necessary. Ensure the machine is turned off.
### 4. Gather Necessary Tools and Equipment
– **Tools Needed**: A socket set, wrenches, a torque wrench, a jack, and safety equipment (gloves, goggles).
– **Replacement Parts**: Ensure you have the correct replacement trailing arm and any necessary hardware.
### 3. Safety Precautions
– **Wear Personal Protective Equipment (PPE)**: Always use safety glasses, gloves, and steel-toed boots.
– **Follow Safety Protocols**: Be aware of your surroundings and ensure no one is in the work area while you are working on the excavator.
### 2. Prepare the Work Area
– **Clear the Workspace**: Remove any obstacles
and ensure you have ample space to work.
– **Have a Plan**: Familiarize yourself with the excavator’s service manual for specific details regarding the trailing arm replacement.
### 1. Review the Service Manual
– **Check Specifications**: Before starting, consult the Hitachi EX220-2 service manual for any specific instructions or torque specifications related to the trailing arm replacement.
Remember, while this guide provides a reverse order of steps, it is crucial to follow all safety protocols and manufacturer guidelines during the process. If you’re not experienced in heavy equipment repairs, consider consulting a professional mechanic.
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