Hydraulic Tank Cover For Hitachi Excavator ZAX60 ZAX70 Air Breather Valve

The hydraulic tank cover on an excavator is an essential component that protects the hydraulic fluid reservoir from contamination and helps maintain the proper operating conditions of the hydraulic system. Here’s a guide on how to use and maintain the hydraulic tank cover:

1.Understanding the Function
The hydraulic tank cover seals the hydraulic fluid reservoir, preventing dirt, debris, and moisture from entering the system.
It also helps maintain the correct pressure and temperature within the hydraulic system.

2.Inspecting the Hydraulic Tank Cover
Visual Inspection: Regularly check the hydraulic tank cover for any signs of damage, such as cracks, warping, or corrosion. Ensure that the sealing gasket is intact and not worn out.
Check for Leaks: Look for any signs of hydraulic fluid leakage around the cover, which could indicate a poor seal or damage.

3.Opening the Hydraulic Tank Cover
Safety Precautions: Before opening the hydraulic tank cover, ensure that the excavator is turned off and parked on a stable surface. Allow the hydraulic system to cool down if it has been in operation.
Remove Fasteners: Depending on the design, you may need to remove bolts, screws, or clamps that secure the cover in place. Use the appropriate tools to avoid damaging the fasteners.
Lift the Cover: Carefully lift the hydraulic tank cover off the reservoir. Be cautious of any residual hydraulic fluid that may spill out.

4.Checking Hydraulic Fluid Levels
Fluid Level Check: With the cover removed, check the hydraulic fluid level using the dipstick or sight gauge, if available. Ensure that the fluid is at the recommended level according to the manufacturer’s specifications.
Fluid Condition: Inspect the hydraulic fluid for any signs of contamination, such as discoloration, particles, or a burnt smell. If the fluid appears dirty or degraded, consider replacing it.

5. Adding or Replacing Hydraulic Fluid
Adding Fluid: If the fluid level is low, add the appropriate type of hydraulic fluid as specified in the excavator’s manual. Use a funnel to avoid spills and ensure that the fluid is clean and free of contaminants.
Replacing Fluid: If the fluid is contaminated, drain the old fluid from the reservoir and replace it with fresh hydraulic fluid. Follow the manufacturer’s guidelines for the proper procedure.

6. Reinstalling the Hydraulic Tank Cover
Position the Cover: Once you have completed your checks and any necessary maintenance, position the hydraulic tank cover back onto the reservoir.
Secure Fasteners: Reinstall any bolts, screws, or clamps that were removed. Ensure that the cover is securely fastened to prevent leaks.

7. Final Inspection
Check for Proper Seal: After reinstalling the cover, inspect the sealing gasket to ensure it is properly seated and that there are no gaps.
Test the System: Start the excavator and operate the hydraulic system briefly. Check for any leaks around the hydraulic tank cover and ensure that the system is functioning correctly.