Bogie Bolster vacuum brakes

Can anyone advise where drawings and information could be obtained for the brake system ( vacuum) fitted to a 1961 wagon . The bogies are Davies and Lloyd. I am told that this is an American design of bogie used extensively world wide.
In particular any information on the two horizontal cylinders ( one shown in the photo ) would be appreciated. Also the brake bar slide sleeves.
We are trying to make this wagon serviceable again . Thanks

 

Is that a SAB Brake adjuster?
However they are more usually found on Air systems I think.

Common on coaching stock and other vehicles such as Seacow Ballast Hoppers.

 

I would agree that the "horizontal" component is a brake adjuster but behind it is a "vertically" mounted vacuum cylinder. It looks to be just a normal cylinder, the spares for this should be compatible with your coaching stock assuming that they are the same size.

 

Thanks guys . No problem with the vacuum cylinder, just standard stuff same as the coaches . Just baffled with the brake adjuster and how it works, setting up , overhaul and spares etc.
Thanks for the response.

 

It's what in the Commercial Vehicle industry, is termed a 'Slack Adjuster'. We have one of our staff that have taken one apart, and we have plans to send some off for refurbishment. It contains a large spring so, in the terms of, "Don't do this at home", don't try messing with it.

As for how it works. It's late at night. Let me get back to you.

 

Quite a lot of info on these or similar units on Indian Railways. Thanks for replies.