could a Discovery II air suspension compressor inflate tyres?
Posted 29 June 2006 - 07:35 AM
Posted 29 June 2006 - 08:05 AM
does anyone know if the little compressor used in Disco II's to run the air suspension could be used to inflate tyres? i've seen a P38 compressor being used for this purpose, and it works realy well... but i don't know if the Disco II pump is smaller, as it only has to inflate the rear air bags.....
Yes you can. The flow rates are not great, but both units are 100% duty cycle
Posted 29 June 2006 - 08:07 AM
Posted 29 June 2006 - 08:15 AM
Posted 29 June 2006 - 11:04 AM
Posted 29 June 2006 - 11:25 AM
would think it will be v slow process? takes a long time to inflate a pair of springs if they have gone flat overnight!
I used to use a RR one - and it was not too bad. The answer of course is to use a reservoir. For a while I used my spare tyre as a reservoir. It seemed fine up to the max pressure of the compressor (about 140psi) although probably not reccomended!
When I first tried it, I was hoping the tyre would explode - just to see what happened but didn't have a compressor capable of generating enough pressure (200psi was as much as I could get) Figured that running at half the max I tried would probably be OK.
(Don't try this at home kids!)
Starting at 120psi, it had enough air to inflate the four tyres from 18psi to 30psi pretty quick or enough to change a tyre with a rattle gun. It took about half an hour to get the spare up to pressure.
Posted 29 June 2006 - 11:51 AM
Posted 29 June 2006 - 12:30 PM
Posted 29 June 2006 - 12:51 PM
does anyone happen to know the CFM and current draw....
i reckon i could put it on my loadspace, where one of the dickie seats should be (only got 5 seats)
Posted 29 June 2006 - 07:22 PM
Read here for alternatives:
While interesting, a lot of that information has now been rendered redundant, as overhaul kits for the original compressor are available at a reasonable price from www.rover-renovations.com
Yes, I am a satisfied customer.
There are instructions on the site to assist in repair. Ignore the advice if you like wasting money by wrecking the piston ring.
A note about the original 38A installation.
Despite what I've copied above, the pump is protected by a 30 Amp fuse, I suggest you replicate that protection.
There is NO thermal cut out in the pump. There is a normally closed contact, connected to Earth, which opens when overheating occurs, but it's up to 'you' to create a circuit where this disconnects the operate path for the switching relay. Is it stating the obvious to say that this contact is not designed to switch off a hot inductive circuit directly? Perhaps not, but it is stated just in case. Use relays to switch the pump.
Posted 30 June 2006 - 02:49 PM
Total spend was less than about a tenner I think.
Posted 30 June 2006 - 04:40 PM
I'll have a nose at your setup at 7S if you don't mind
100" TDi Defender
Posted 30 June 2006 - 06:12 PM
Are aircon pumps any good for onboard air?
Yep. There are a couple of good write-ups on using aircon pumps for OBA in the tech archive...
[must get round to installing mine sometime....]
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Posted 30 June 2006 - 08:59 PM
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