On Monday, April 7, 2014 2:33:56 PM UTC+1, Another John wrote:
We have an old banger for running around in, and I need to use my foot
pump more than I'd like on its rather old and rusty wheels.
Lately my pump *seems* (could be wrong) to have become less effective,
i.e. I seem to need more pumps per PSI injected.
Is there any kind of maintenance I could do on the pump? The cylinder
is welded closed, but I wondered what might happen if I (for example)
sprayed WD40 into it via the air intakes. For example would it
revitalise the valve in there? Obviously I could try it, but
maybe someone here has tried it before, and can advise Yes or No!
Cheers
J.

WD40 is quite the wrong thing. A drop or 2 of oil into the pump often fixes it. Very little of it ever gets out into the tyre, and driving over engine oil doesnt do a tyre any significant harm.


NT