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As with any hydraulic part or component, the process of regular preventative maintenance on hydraulic cylinders is essential in keeping them in top working condition. Although there are a few different types of hydraulic cylinders, the general process for analysing them and repacking a cylinder is relatively similar. We always recommend that you go through a professional hydraulic service technician for hydraulic cylinder repair, but here’s the rundown on how to repack a hydraulic cylinder.

How do I know if my cylinder needs repacking?

Some of the typical signs that your cylinder needs repacking include: 

  • If you’ve noticed that your hydraulic cylinder is leaking more oil. 
  • Seems to be some increased level of difficulty in moving a part or lifting a heavy load.
  • Implements appear to be leaking down at more of a faster rate than usual.

Repacking the hydraulic cylinder 

The process to repack a hydraulic cylinder isn’t overly complicated and gives you the assurance that your machinery is at its peak level again. Here’s the step by step guide on how to repack a hydraulic cylinder:

  1. Release all of the pressure from within the cylinder.
  2. Make sure to remove any dirt or debris that’s been building up on the head and cap of the cylinder.
  3. Remove the hydraulic lines from the cylinder to get rid of any last bits of pressure.
  4. Remove the pin and gland from the cylinder. This part is a little tricky as each cylinder can be different depending on the manufacturer. You may need a special tool to help loosen up the gland.
  5. Remove the piston rod carefully, ensuring that it doesn’t get contaminated from other components or dirt. You’ll need to be cautious as to not damage the fine threads inside of the cylinder, as this could result in quite an expensive repair or replacement job.
  6. You might want to consider taking photos of each step of the process to keep track of things and ensure you are keeping all of the different parts in order.
  7. Replace the o-rings and the seals of the piston and gland one at a time. Take your time to ensure that each of the parts is replaced in the correct order and place.
  8. Always be mindful of thoroughly cleaning out any dirt or debris while you’re switching parts.
  9. After this you’ll need to reattach the piston back to the rod, ensuring that you use a thread locking adhesive when you’re replacing the piston rod bolt.
  10. Reinsert the gland back into the cylinder. 
  11. Replace all of the hydraulic lines and start testing for any sign of leaks around the new seals. 

This general procedure should be able to work quite well for the vast majority of hydraulic cylinders. Bear in mind that this process needs to be done carefully and precisely to leave your hydraulic cylinder operating smoothly, making sure to avoid any form of injury in the process. 

Are your cylinders in need of a service? Contact Hydraulic Solutions and Sales

If you aren’t confident in the maintenance process, please reach out to the hydraulic specialists at Hydraulic Solutions and Sales. As part of our comprehensive hydraulic repairs, we’re able to give your hydraulic cylinders a full audit to see if they may need to be repacked. We can also review your other hydraulic components ensuring that your hydraulic machinery is running at top condition. 

If you think your cylinders or other parts are in need of a service, get in touch with the experts at Hydraulic Solutions and Sales today on +61 8 9437 5388 or send us an enquiry on our services.