Tag Archives: wrench

Replacing Hydraulic Cylinder Seals – Part 3 – Pulling it all apart

Now that we are able to remove the hydraulic cylinder gland, I need to pull the cylinder apart so I can replace the seals. Once I get into the gland and plunger deals I run into issues. I think its related to the aftermarket seal kit, so I go and order the OEM kit from New Holland. I compare the seal kits that you get form the aftermarket suppliers verses the OEM suppliers.

OEM is definitely a nicer kit and I would recommend just going with OEM from the start if you can. Some hydraulic cylinders are so old that you can’t get OEM seal kits for, so in those cases you just have to hope aftermarket will work.

Always try to research your seal kits before you start the tear down of the hydraulic cylinders so you know what you are dealing with. You may also call your local hydraulic shop to see if they have generic seals that will work for your cylinder, especially if its old.

Replacing Hydraulic Cylinder Seals – Part 2 – Removing a stuck gland

So in part one I start the process of replacing the seals in my New Holland LB75B loader hydraulic tilt cylinder and run into issues removing the gland. This video I show you how I solved that using the peening method. Using a simple ball peen hammer, I am able to work the retaining wire out. This method was a life saver and is probably the best way to remove a stubborn hydraulic gland.

The peening method should work for all shapes and sizes of hydraulic cylinders. Peening is a common method used in welding and metal work. I hear people using cutting torches to heat up the gland and that can work, but you also risk warping the cylinder tube. You can also use a pipe wrench and a very large cheater bar, but you risk tearing up the gland and beating up the hydraulic cylinder rod. DO NOT HIT THE CYLINDER ROD. That is a big mistake.

The peening method should be all you need to do to remove that frozen up gland. Either locktite was used or you have rust in the gland, but the peening method will get it off.

Here is a post about someone talking about the peening method for gland removal: https://www.heavyequipmentforums.com/threads/hoist-piston-end-cap-removal-question.11396/

Before you lose your mind trying to get a gland off, try this method. Let me know in the comments if this worked for you.

In the next video of this series, I talk about seal kits and how part number changes can give you a read headache.

Replacing Hydraulic Cylinder Seals – Part 1 – Preparing to tear down the cylinder

I am preparing to replace the hydraulic cylinder seals on my New Holland LB75B backhoe loader tractor. The cylinder has been leaking and getting worse by the day and I want to replace the seals myself. People also call this repacking or rebuilding the cylinder. Bringing the cylinder into a dealer or hydraulic shop is going to be anywhere from $500 to $1000 just in labor and I am sure I will need to replace more in the near future.

I purchased the PDF service manual fro the tractor and plan on doing most if not all of the work myself. There are 10+ hydraulic cylinders on this backhoe which counts for a lot of seal kits to replace. Then add the fact I have 4 tractors that will all need this done one day and you have a lot of money invested in cylinder rebuilds.

I also go over the different types of hydraulic cylinders that you will find on a backhoe and what they are named so you can find the seal kits easier when looking online. This tractor is a New Holland and its parts catalog is available online. You can print out your parts and the diagram to help you with your rebuild.

The New Holland LB75B is a pretty popular backhoe in mainstream construction. I bought this one for what I think was a good price to use it strictly on the farm. It has about 4000 hours on it and still runs great. I can expect to add a few more thousand without major issues.