Air Compressor Rebuild ??

Ean Austral · 9th March 2018, 09:07 PM

Doing mine tomorrow , got the BONG today and took ages to find the fault but it was too slow to rise or something like that.

See how it goes.

Cheers Ean

**101RRS** · 9th March 2018, 09:54 PM

Originally Posted by DiscoJeffster

If you read the original post you’ll see the dude damaged the piston as part of the simpler rebuild.

But is the piston actually damaged or the replaceable wrap around ring bit that surrounds the actual metal piston? The wrap is part of the standard kit.

**DiscoJeffster** · 9th March 2018, 11:01 PM

Originally Posted by garrycol

But is the piston actually damaged or the replaceable wrap around ring bit that surrounds the actual metal piston? The wrap is part of the standard kit.

Grappler posted
“Had a major fail today trying to refurb the Hitachi compressor. I broke the top of the piston attempting to prise the ring seal retainer off.”

**101RRS** · 10th March 2018, 11:27 AM

Originally Posted by DiscoJeffster

Grappler posted
“Had a major fail today trying to refurb the Hitachi compressor. I broke the top of the piston attempting to prise the ring seal retainer off.”

Oh Ok - there are a couple of different threads of conversation - I did not see Grapplers post as I was following Shanegtr

Originally Posted by shanegtr

I recently had my compressor fail - cylinder was stuffed. didnt realise that spare piston cylinder kits where available. Will have to order a set myself now and rebuild my old compressor for a spare.

Hence Grapplers response on getting a piston and conrod kit did not seem appropriate to fix Shanegtr's problem but is clearly what he needs.

All makes sense now - thanks - in Grapplers case I think a a new compressor is the best option - as both kits are now needed and for not much more you can get a new compressor.

I hope is all works out Ok for Ean, Grappler and Shanegtr

.

My Compressor is now 10 years old and still running - apparently OK and I have a rebuild kit to go in when I get motivated. After new brakes, steel pan on the gearbox, put the RAI on and install the electric brake controller.

Garry

**DiscoJeffster** · 10th March 2018, 11:36 AM

Garry. I would do it now if you have the kit. The sooner you change the desiccant the less likely you’ll have other complications. The filters should stop the fine powder from the failing desiccant affecting the rest of the system, but this hasn’t been the case for everyone. I did mine proactively so it didn’t fail in the middle of nowhere or cause other issues.

**shanegtr** · 10th March 2018, 03:07 PM

Originally Posted by garrycol

Oh Ok - there are a couple of different threads of conversation - I did not see Grapplers post as I was following Shanegtr

Hence Grapplers response on getting a piston and conrod kit did not seem appropriate to fix Shanegtr's problem but is clearly what he needs.

All makes sense now - thanks - in Grapplers case I think a a new compressor is the best option - as both kits are now needed and for not much more you can get a new compressor.

I hope is all works out Ok for Ean, Grappler and Shanegtr

.

My Compressor is now 10 years old and still running - apparently OK and I have a rebuild kit to go in when I get motivated. After new brakes, steel pan on the gearbox, put the RAI on and install the electric brake controller.

Garry

Well my issue is sorted as I purchased a new compressor, but I would still like to rebuild my old one for a spare - stuffed cylinder so the replacement piston and cylinder would sort it - and the old one already has new desicant too.

Ean Austral · 10th March 2018, 06:58 PM

mmmm well the job is easy enough to do , but sadly I have an air leak out of both the fittings on the end cap of the dryer .

Rebuild was straight forward , and I was surprised that a lot of the disscant was still quite solid but there was signs of it having turned to like a fine grain sand.

Will have a bit more of a play and see if I can get this to seal.

Cheers Ean

**DiscoJeffster** · 10th March 2018, 07:27 PM

Originally Posted by Ean Austral

mmmm well the job is easy enough to do , but sadly I have an air leak out of both the fittings on the end cap of the dryer .

Rebuild was straight forward , and I was surprised that a lot of the disscant was still quite solid but there was signs of it having turned to like a fine grain sand.

Will have a bit more of a play and see if I can get this to seal.

Cheers Ean

Did your kit come with a new aluminium end cap? If so, I have an idea for you.

Ean Austral · 10th March 2018, 07:30 PM

Originally Posted by DiscoJeffster

Did your kit come with a new aluminium end cap? If so, I have an idea for you.

No I was a tight arse just bought the basic kit .

cheers Ean

Ean Austral · 12th March 2018, 01:08 PM

So some thoughts on the rebuild.

I attacked mine as I had the fault of the compressor taking to long to build pressure or something similar to that. I had already ordered the rebuild kit - albeit without a new dryer end cap - and the rebuild wasn't that difficult and I think in hindsight it wasn't really in need of a rebuild . With the install I had the fittings leaking in the dryer end cap which I managed to fix with some new pipe and a couple of joiners .

Low and behold start it up and all good for about 3 or 4 minutes and I hear the compressor start up. I did some leak checks and sure enough there is a crack in the end cap and its leaking enough to have the pressure drop in a couple of minutes. In all honesty I think this may have been the initial problem , as I took great care removing the cap and altho not impossible it could have cracked on removal , I think it unlikely.

Ordered a new end cap today , and covered the other in some epoxy to see if that will hold till the new one arrives , but if I could go back knowing what I know now I would check it for leaks/cracks before assuming it needed a rebuild.

Just my 2c worth

Cheers Ean

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