How do you renew air filter in brake servo unit?

[crankin]

Can someone explain this to me?

[SafeAirOne]

Didn't know there was one. I figure the only replaceable thing is the anti-return valve, or whatever the British term for "check valve" is...

[crankin]

We'll I know on the rebuild kits there is one. But I thought special tools were needed to get into it.

Now on page 10-2 of the repair manual...second column it says that at 36,000 miles renew the air filter.

If no one has done it...then i won't worry about it.