Changing the gearbox oil on a Liebherr A900 hydraulic excavator is an essential maintenance task that helps ensure the machine operates smoothly and efficiently. click here for more details on the download manual…..
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Here’s a step-by-step guide to help you understand how to do it, even if you have little mechanical experience.
### Tools and Materials Needed:
1. **New Gearbox Oil**: Check the owner’s manual for the correct type and amount.
2. **Oil Drain Pan**: To catch the old oil.
3. **Wrench Set**: For removing bolts and plugs.
4. **Funnel**: For adding new oil.
5. **Rags or Paper Towels**: For cleanup.
6. **Safety Gear**: Gloves and goggles to protect yourself.
### Step-by-Step Instructions:
1. **Safety First**:
– Before you start, make sure the excavator is turned off and parked on a flat, stable surface.
– Engage the parking brake to prevent any movement during the oil change.
– Wear your safety gear.
2. **Locate the Gearbox**:
– The gearbox is typically located near the rear of the excavator, where the tracks are attached. Consult your owner’s manual if you’re unsure where to find it.
3. **Prepare for Draining Oil**:
– Place the oil drain pan underneath the gearbox. Make sure it is positioned to catch any old oil that will drain out.
4. **Remove the Drain Plug**:
– Using the appropriate wrench, locate the drain plug at the bottom of the gearbox. This is usually a bolt that seals the oil inside.
– Carefully unscrew the drain plug and allow the old oil to flow into the drain pan. Be cautious, as the oil may be warm.
5. **Let it Drain**:
– Allow the old oil to fully drain out. This may take a few minutes. It’s important to remove as much old oil as possible for an effective change.
6. **Replace the Drain Plug**:
– Once all the oil has drained, clean the drain plug with a rag.
– Screw the drain plug back into place securely, but avoid overtightening it.
7. **Add New Gearbox Oil**:
– Locate the fill plug, which is usually found on the side of the gearbox. This is where you will add the new oil.
– Using a funnel, pour the new gearbox oil into the fill hole. Be careful not to overfill; refer to the owner’s manual for the correct amount of oil needed.
8. **Check the Oil Level**:
– After adding oil, check the level using the dipstick (if available) or By following the guidelines in your manual. Make sure it is at the recommended level.
9. **Reinstall the Fill Plug**:
– Once the oil level is correct, securely replace the fill plug.
10. **Clean Up**:
– Wipe any spilled oil from the machine
and surrounding area with rags or paper towels.
– Dispose of the old oil properly By taking it to a recycling center or an appropriate disposal facility.
11. **Final Check**:
– Start the excavator and let it run for a few minutes. Check for any leaks around the drain and fill plugs.
12. **Documentation**:
– It’s a good idea to write down the date of the oil change and any observations for future reference.
### Conclusion:
Congratulations! You’ve just changed the gearbox oil on a Liebherr A900 hydraulic excavator. Regular maintenance like this helps keep your machine running smoothly and extends its lifespan. If you have any doubts or run into issues, don’t hesitate to consult a professional or your equipment manual for guidance.
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