air assist brakes

[jetman10]

I have a '66 Kaiser/Jeep deuce and it doesn't appear that the air assist is working . Very hard to stop . I have it bobbed , and with no body I think it should drag the rears . I just took a short ride on a back road to check it . I have air to the cylinder from the tanks . I bled the new hydraulic lines to the rear after I bobbed it, no problems there . How do I check if the air piston is stuck or not ? And, if I bought a rebuild kit, maybe the air cylinder is no good after I get it apart ? My manual says to replace the cylinder if what I checked is O.K. Darn things aren't cheap ! Thanks for any ideas .

 

[welldigger]

If you have a firm pedal but it doesn't stop worth a crap then chances are your air pack (air cylinder as you called it) is bad. Pull it off of the truck and tear it down before you order a rebuild kit. It may be too rusted up to rebuild. If thats the case then you will need a new one.

 

[gimpyrobb]

I might have some parts if you need some, but take it apart to see how it looks first.

 

[KsM715]

You need to bleed the whole system not just the rears. Air could have migrated up the lines and bleeding the rear only could have missed some.

 

[CARNAC]

I have it bobbed .

There's the problem. LOL

 

[welldigger]

You need to bleed the whole system not just the rears. Air could have migrated up the lines and bleeding the rear only could have missed some.

He has a point here. Is your pedal spongy or firm? If it is spongy then I suggest bleeding the entire system in the correct sequence. If the pedal is firm then it's most likely the air pack.

 

[gimpyrobb]

Quick question on the "bob job". I know one truck that was bobbed, and the guys that did it, used a compression fitting to run the "service" and "emergency" glad hand copper lines TOGETHER. That is a bad thing to do. That didn't happen on your truck, did it?

 

[porkysplace]

jetman10 , PM sent in reply to your e-mail .
The master cylinder should be vented . Then you need to fix the rear leaks and when you bleed it do the air-pac first . and build yourself a power bleeder. Deuce Power Bleeder R4x4 Style

 

[RAYZER]

Quick question on the "bob job". I know one truck that was bobbed, and the guys that did it, used a compression fitting to run the "service" and "emergency" glad hand copper lines TOGETHER. That is a bad thing to do. That didn't happen on your truck, did it?

You can't tie the service and emergency air line together, (ask me how I know).

 

[Jeepsinker]

Have you adjusted the brake shoes? It makes a huge difference if they are bad off.

 

[porkysplace]

Have you adjusted the brake shoes? It makes a huge difference if they are bad off.

He has way more problems than a adjustment , this is the e-mail I got .

[ I have a '66 Kaiser/jeep deuce and I didn't have any air assist when I got it . Good hard pedal though . I installed a kit in the air pac and then no brakes at all .I just installed an NOS pac and now have some pedal but still no air assist . My master cylinder looks like it has a non-vented iron cap . Is this right ? After running a lot of DOT5 thru it , now I have both rear drums leaking fluid ! Also, shouldn't I hear a puff of air when I release the brakes ? Thanks .]

It's just a guess but wheel cylinders leaking and probably didn't bleed the air-pac first . Hopefully he will post up a progress report.