Member Since: 22 May 2019
Location: Norfolk
Posts: 305
Garrycol Where do you source your parts from? Im struggling to find a ‘new exhaust valve and housing’ plenty of options for other rebuild kits,
PROFSR G in your experience would (if I can’t find the valve and housing) I be better in the long run changing to AMK? It’s roughly £70 more for the kit than a straight hitachi replacement, how often do you see AMK for refurb vs Hitachi? I believe I’d need to tell the D4 it has AMK fitted, can I do with this with the iid tool?
3rd Apr 2022 12:02 pm
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 5044
They are both good compressors but if your Hitachi has been there for a long time it's worth considering replacing it with a new one. The AMK like the Hitachi is easy to service (drier desiccant and filters, and exh valve) and should be done every three or four years.
There are still a lot of Hitachi's out there and some owners are doing their own DIY servicing. I would still see both coming in for maintenance but I would see less AMK component failure when compared with Hitachi.
If you decide to change over the IID has the firmware already installed, so you will be able to do that too.yµ (idµ - eAµ) ψ=mψ
3rd Apr 2022 12:41 pm
garrycol
Member Since: 06 Dec 2010
Location: Canberra
Posts: 1130
Andyyav wrote:
Garrycol Where do you source your parts from? Im struggling to find a ‘new exhaust valve and housing’ plenty of options for other rebuild kits,
Most parts are available from X8R or 4x4Airseals or ebay. The LR part number for the exhaust valve is LR020590. The housing may not be needed but is certainly hard to find but I got mine on ebay.
Just googling it I found the complete valve and housing on ebay but sold by 4x4Airseals but currently out of stock https://www.ebay.ie/itm/112633124293
These people also sell them - watch it through Youtube and you get the links to the supplier. (turn off the sound)
3rd Apr 2022 12:56 pm
Andyyav
Member Since: 22 May 2019
Location: Norfolk
Posts: 305
Cheers for all the info, the compressors not that old so I’ll see if I can service/repair it first
4th Apr 2022 7:54 am
garrycol
Member Since: 06 Dec 2010
Location: Canberra
Posts: 1130
My Hitachi is 15 years old with one rebuild and still goes great.
4th Apr 2022 8:35 am
Andyyav
Member Since: 22 May 2019
Location: Norfolk
Posts: 305
Don’t think mine will last that long, changed LR020590, fitted the aluminium cap to the drier (from my old compressor) and disconnected the exhaust pipe, still have a small hiss of air leaking from what sounds like the drier and then after a few miles when coming to a stop ‘pressure does not decrease when venting gallery’ error, as said it’s easier to hear what the exhaust is doing with the pipe disconnected and when it faulted it did sound restricted. Do you know if what I assume is the electrical exhaust valve is available as a spare part? Fault cleared on restart wondering if it’s a ‘lazy’ valve and the possibility of adjusting anything via the iid to allow it an extra second or two when waiting for the pressure to drop 🤔
5th Apr 2022 6:28 pm
garrycol
Member Since: 06 Dec 2010
Location: Canberra
Posts: 1130
If you have a hiss from the front of the desiccant chamber where the pipes go to the central valve block then you have the usual fine cracks in the cover plate - fitting an aluminium cover plate as part of the rebuild will fix that.
6th Apr 2022 1:01 am
Andyyav
Member Since: 22 May 2019
Location: Norfolk
Posts: 305
Update
Ive ordered the AMK replacement kit from advanced factors, should be with me soon.
with reference to the air dry cracks on the Hitachi is there any parts i should upgrade on the AMK before fitting?
andy
Edit - AMK fitted no issues so far
18th Apr 2022 7:17 pm
greydisco
Member Since: 23 Dec 2021
Location: mon
Posts: 2
suspension compressor air filter
had exactly the same problem and fault codes as you. solved it when my son failed to connect the air exhaust pipe correctly to the compressor and everything started working. following the route of air from the exhaust cleaned all distribution valves etc but to no avail. the final component in the route was the air filter which is located behind the passenger side rear light cluster and it was blocked. cleaned it and no problems since. you can find it via the access hatch inside the boot (similar to jack access hatch but on passenger side) but easier to see what you are doing if you remove the rear l/h light cluster. i pulled mine apart and washed the foam element, which seemed preferable to routing the pipe of a replacement all the way to the desiccator. hope this helps somebody.
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