Lorry tyre help

Limbo1

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20 March 2009
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Hi

I went to check my tyres yesterday and can't work out how to do the inside rear ones. It is a DAF 7.5t 11 yrs old. It has no user manual and Google doesn't help.
There is what looks like a long tube connected to inner tyre poking through outer. I connected to this but did not read pressure or fill. Is this the right thing? Does it need cleaning?? At a loss and now worried I filled outer and the inner may be a different pressure and could lead to uneven wear or worse.
 
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