Air Compressor
Author
Discussion

Matthen

Original Poster:

1,389 posts

168 months

Wednesday 11th July 2012
quotequote all
Hi all

I've just purchased an Air Compressor from Tesco for a couple of pounds, and that's all well and good. However, reading the manual it states "Do not use with the engine on."

So my question is this, is it saying this for Health and Safety reasons? Or is there a particular reason I shouldn't run it with the engine on, I have no desire to flatten my battery.

Ozzie Osmond

21,189 posts

263 months

Wednesday 11th July 2012
quotequote all
Possibly the 12v motor wouldn't be happy with c.15v from the alternator.

Matthen

Original Poster:

1,389 posts

168 months

Wednesday 11th July 2012
quotequote all
I thought cigarette lighter sockets were 12V all the time?

cuprabob

17,068 posts

231 months

Wednesday 11th July 2012
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Matthen said:
I thought cigarette lighter sockets were 12V all the time?
`

No, it increases to around 14V when teh alternator is running.

To be honest I wouldn't worry too much about it, if it's rated at 12V, 14V isn't going to kill it.

waring is probably H&S incase you use it in an enclosed area and kill yourself with exhaust fumes while blowing a tyre up.

Matthen

Original Poster:

1,389 posts

168 months

Wednesday 11th July 2012
quotequote all
cuprabob said:
No, it increases to around 14V when teh alternator is running.

To be honest I wouldn't worry too much about it, if it's rated at 12V, 14V isn't going to kill it.

waring is probably H&S incase you use it in an enclosed area and kill yourself with exhaust fumes while blowing a tyre up.
Thats what I thought, gas myself or run myself over...

Martin350

3,797 posts

212 months

Thursday 12th July 2012
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If you're using it for car tyres I would suggest you also buy a pressure gauge.
A work colleague of mine has an MR2 Roadster and pumped the tyres up (26psi front, 32psi rear) with a cheap plug in compressor.

He said to me a little while afterwards that he thought something was wrong with it, and when I checked with my air line and gauge it showed around 20psi and 25psi.

It drove fine after I pumped them up the rest of the way.


Matthen

Original Poster:

1,389 posts

168 months

Thursday 12th July 2012
quotequote all
Martin350 said:
If you're using it for car tyres I would suggest you also buy a pressure gauge.
A work colleague of mine has an MR2 Roadster and pumped the tyres up (26psi front, 32psi rear) with a cheap plug in compressor.

He said to me a little while afterwards that he thought something was wrong with it, and when I checked with my air line and gauge it showed around 20psi and 25psi.

It drove fine after I pumped them up the rest of the way.
I've got one - A digital one from halfords which seems accurate. Its also got a tyre tread measuring thing on it, which is useful. Thanks for the advice though smile