what type of brake chamber is this?

Looks like a standard 30-30 chamber.

 

No, its a 30-30 long stroke. Not standard.

 

just make sure if you have square ports you replace with square and if its round replace with round

 

Any long or standard stroke I've seen has the permanent crimp type of clamp over the spring brake section. I haven't seen the bolted types clamps in years. I am guessing this is quite old and pre-dates when square plugs where used to designate long vs standard stroke. The middle section doesn't look longer. Long strokes actually have three identifiers. The square ports are one, there is also supposed to be a triangle tag on the clamp to id it as a long stroke, but there is also supposed to be something actually molded into the housing saying it is long stroke chamber. What ever you do, do not undo the outer clamp, that is where the big spring is, in case you do not know! Very dangerous!

 

Yes. For sure, replace the entire chamber. The DOT likes to see shiny new parts, fresh grease, etc.

 

Its strange as a truck mechanic I've never seen this set up I'll explain. The double clamp chamber has not been used in at least ten years but are still around. However the square ports are tell tale of long stroke but was sure they came on to market after double clamp was removed from use? In any case I would say its a 30/30 long stroke chamber if you clean off around the pushrod it should state the chamber size or around the air ports.