In article <3poag7Fb7404U1@individual.net>, Lee_D
<newsgroupNOSPAM@NOSPAMlrproject.com> writes
>A while ago we discussed on board air systems and there was some interest in
>a compressor I got for £5 at a forecourt in Dorset touring. Well , just been
>to get a gallon of derv for the Rangie so it has sufficent fuel for it's
>final trip with us tomorrow and local Morrisons (forecourt shop) are doing
>the same compressor £4.99. Nice little unit , fits even in it's box within
>the centre cubby box on a Disco 1. Says it's 300psi but hope never to have
>the need to test it! I got another for our second car as you can pretty much
>guarentee that if I need one it'll be in the other daily driver.
>
>Anyway enough of the hard sell. I should be on commision here! Just though
>it worth flagging up again given they are in circulation.
>
>Lee D
We've had a couple for ages too, and they *are* useful. Coupla points:
- They are high current devices. Fitting a locking cigar-lighter plug
(if that's what you use) is a good idea to prevent overheating. I
usually run the engine whilst pumping the tyres, as the higher voltage
seems to help a lot and it doesn't drain the battery so much. I think
they must pull close on 100W. We've got aux power outlets in the back of
the people-carrier, but I wouldn't be tempted because of the extra cable
length (I always use the lighter socket). Delegating a small child to
hold the plug in is good too!
- naturally the compressor part is crude. The older one of ours was
sounding strained recently, much improved by three-in one oil dribbled
into the cylinder. The gears are greased nylon, so I left those alone. I
think this will be a regular thing.
- Even when well-lubricated they struggle to get to 50PSI. I don't think
the castings could cope with 150, let alone 300!
- the pressure gauges on both of them are wildly off target. Obviously I
use another gauge, but the other thing of concern is that tyre pressures
should be measured cold and the output air gets very hot. Thus I usually
give it about 3 PSI more than spec (on the Landy), less in the winter,
which seems to settle back to the pressure I want.
- they are good for pressure, not volume. The kids nearly knackered one
of ours by trying to use it for an inflatable.
Regards,
Simonm.
--
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