brake problem.

[CGarbee]

Great set of photos. Good to hear that you are about ready for a road test.
I hope not to have this problem show up on one of my rigs, but I really appreciate knowing that this thread is here for reference if it does.
Thanks.

 

[madsam]

Well, I got the booster/air pack in the truck and bled, but I need to bleed the whole truck tomorrow. I did test it, and the booster seemes to be working now. No unnessiary loss of air. I can hear the brakes being pushed, but the peddle is still spongy, so I have to bleed all the wheels now.

 

[madsam]

Ok, I bled everything today. (Well the master, the air pack, and the front.) It seemed to remove all the air out of the lines. Then I tested the brakes with air pressure. the air pack has never wored so good. It locks up the brakes with no problem... So it is all fixed..

 

[madsam]

Ok, one last thing. It looks like the Air Pack on the 5Ton looks almost the same as what was on the GMC M135 from ww2. (Maybe..)

http://www.alfaheaven.com/Military Section/M135Mech.html

 

[indy4x4fab]

So is it possible to remove just the large air chamber side of the air pack with out having to unhook the hydro-lick side of the air pack and there for eliminating the need to re-bleed the brakes?

 

[indy4x4fab]

I found that you can pull just the air side apart, on my truck I found no brown clay like gew, but did find that it was bone dry in there so I sprayed the o-ring down with some P.B. Blaster air tool oil spray and sprayed down the cup, put it all back together and had a firmer petal then before and the brakes released smoother, I didn't feel them dragging at all now. I checked to make sure there wasn't any line pressure on the air pack once I released it. Then had mrs._indy4x4fab help me re-bleed the pack just for good messure which there didn't seem to be any air in it so I'm thinkink I'm good to go now. Took it out for dinner last night and had no problems with it.

 

[sparepartsracing]

Having this problem right now with my truck. Thank you so much for the write up. I was about to take it for a ride and it wouldnt build pressure up. When i did my pre trip inspection(dont laugh, This truck is big and i dont want to kill anyone ha ha) i noticed alot of air coming out of that exhaust line and thought something got disconnected. Once again thank you for this write up and i will post back with results once i do this.

 

[dave wagner]

Thanks for the pictures of your air pack. Started working on my 5 ton today. After taking apart my parts truck air pack to rebuild I had to go to plan B and take off the existing air pack to rebuild. Both air packs had some type of grease in the air canister. I looked for what type lube this is in the TM's but did not see anything but to use brake fluid. After reading a few threads