LR3 | Hitachi Air compressor Rebuild | New piston and barrel | Air suspension

Well my home city of Perth is on a 4 day lockdown and I cant fly to work. So I thought I'd jump into rebuilding my spare air suspension compressor for my Land Rover Discovery 3. This is the earlier Hitachi model as I haven't changed over to the AMK.
This one had excessive wear to the piston glide ring that eventually wore the barrel (cylinder) out. When it originally failed I ordered a basic rebuild kit but only discovered the wear when stripping it down the first time and at that point I ordered a complete new compressor.
I'm getting to the point where I should be doing a desiccant changeout on the current compressor but figured I would have this one ready to go and just do a swap out. I can then get the next one ready for a swap out in the future.
If you require a new piston and barrel, this is the parts I used: amzn.to/3wcdfkc
At time of uploading there was a limited availability of these, they are getting more and more uncommon so I would think at some point the old compressors are going to end up unrepairable. In order to avoid that make sure you maintain your air compressor - throw a new set of seals into it when you do your desiccant every few years.
for rebuild kits from Amazon- amzn.to/2WasZIe
If you enjoyed this video and would like to see more then please give me a thumbs up, leave a comment and consider subscribing so you don't miss a new upload. You don't have to do all three (or any if you don't want) but it really helps grow the channel.
If you'd like to support the channel so I can keep making videos for you all then please consider a donation via the super thanks!

[@richardwilliams8667]

You missed pulling the electric motor cover off and giving a good blast off with Contact Cleaner while you are there. They are filled with carbon dust and you can give the brushes a bit of light sand paper. Worth doing although I learnt this news also after doing a rebuild on mine. I've done it on a spare unit and its a simple job.

[@Shanes_Shed]

Hi Richard, good point. I still need to add the desiccant to the compressor so I'll have a look at it then

[@joeianniello]

Thank you from the USA We have never been in lockdown in Florida Best Covid rates here

[@jamieboydmusic6956]

Great Video Shane! It’s great to have the confidence to rebuild mine myself after watching you rebuild one.

[@Shanes_Shed]

No worries champ, it's what the videos are here for😄

[@marktowill2828]

Greetings from cold Canada, I know this is a bit late, but I spilled my desiccant on my workshop floor so I regenerated the old desiccant in a 3-minute high microwave and then for 1 hour at 350 F

[@Shanes_Shed]

Thanks for the comment Mark, that would certainly work to dry it out. Many industrial air dryers I’ve worked around do a similar thing. Regen using hot air in a reverse flow through the dryer

[@JayCGypsy]

Excellent video, thanks mate!

[@Shanes_Shed]

Yeah no worries, thanks for the comment.

[@trhosking]

Hammering that aluminium piston against the edges of steel vice jaws made me wince. Use a wooden block at least.

[@Shanes_Shed]

Yep, I deserve that comment😄 But on the flip side it’s not like these things are exactly a precision setup as they are fairly rough considering how much a new one costs

[@OUTBACKDiscovery]

Good video Shane, I'd say probly the most informative I've seen for you compressor on KZbin 🤙

[@Shanes_Shed]

Thanks Rylan👍

[@jt7247]

Somehow I missed this video too. I’ll be doing this job in the coming weeks now. Thanks!

[@Shanes_Shed]

I’m not sure is the piston seal was poor quality or I’ve damaged it, but the seal didn’t last long with this particular rebuild. I have a brand new unit on its way then I’ll rebuild this one again as a spare

[@acrepairnearme]

Great tutorial. Thank you!

[@Shanes_Shed]

Glad you enjoyed it!

[@442Carew]

G'donya Shane

[@Shanes_Shed]

thanks champ

[@pauljames7399]

Thanks for the video! The dual metal plate round filter with all the little holes in it is filled with that old crusty white powder do I need to remove it all before I refit

[@Shanes_Shed]

Doesn’t hurt to give it a wash out. When the dust migrates it’s way into the solenoid valves they can start to leak.

[@pauljames7399]

@Shanes_Shed it seems if you clean it out entirely then there's no way for the new 0 ring to sit around anything.. I'f u know what I mean it would just be loose

[@Shanes_Shed]

There's a filter pad between the metal plates - From memory the factory filter has a rivet holding them together. In the past I've separated the two plates and put in a new filter pad - then bolted them together with a new oring.

[@_chipchip]

Hey mate, just bought a v8 SE 2005 D3. You videos are great, heaps of good detail. Mines got low kms but as soon as I bought it, it’s already needing a couple of coils so figured a good idea to get into the rest of the maintenance stuff too. Probably should check the pump! How did you know yours needed a rebuild of more of a cautionary thing?

[@Shanes_Shed]

So glad the people are finding my videos usefull, thank you for the kind words. This particular pump just failed to build pressure and at the time I just ordered the normal rebuild kit before I pulled it out. Once I stripped it however I found the bad wear in the piston and cylinder - thought Id attempt the new rings/seals but they failed so I ordered a complete replacement compressor as I needed to be 100% sure of having everything working.