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you are referring to the piston cup and the pushrod seal?

I also would like to tkank everybody as well,i disassembled most of my airpak while still on the truck just to see if everything was in place and didnt find anything abnormal,lubed it a bit while apart and put it back together,now its raining and have to wait to see if anything changed

yes,can crack that fitting in the airpak and frees them up

No ,bleeder does nothing,if i crack the fluid line at airpak it will release,makes me think its not a line at axles

checked plug and no air,pedal after repeated pumping gets very stiff,running out of things to consider,although i noticed when driving and it does this it seems to affect the rear wheels first,there again ,new hoses ,blew out lines, shoes adj properly ,i dunno

All new rubber lines,i tried that over the weekend,thought one may be twisted,but all look good.

ok,started up,built pressure,pumped brakes enough times to lock up,jumped out with truck running and cracked the driver side glad hand and NO AIR!!! comes out ?? air will come out pass side glad hand though

Fired it up,let air pressure build up,shut it down ,pulled plug in can and no pressure there,the brakes were locked last nt and this morning they're free.but as always a short drive will lock them again

Yep,caught that one ,just wandering if the springs kinked or something during reassembly

What part of the airpak controls fluid pressure ?I mean if i were to disassemble it again what parts need to come off to see why it went release pressure back to m/c? hopefully i wont have to take it completely apart.

Yes i did,thought it went well.

Wanna swing north and fix mine too? Im thinking its got to be the airpak,after pumping the brakes,or for a short drive they're dragging then locked

Major adj ,as per tm,but why are they locking up?fluid isnt returning past the airpak

Just adjusted the rod at m/c ,thought that may be it ,but not,spring returns pedal to floorboard

I've replaced all rubber hoses ,m/c ,rebuilt airpak,installed remote reservoir,rebuilt wheel cylinders,earlier today checked m/c by removing cap and pushing pedal down and i can see fluid coming back through the tiny hole in m/c,running out of things to check

New m/c,with a remote reservoir

Been having a time with my brakes locking up,fluids not going back to m/c i can crack a line and its good for a bit then same thing,rebuilt the airpak recently and wander if i made a mistake somewhere,when they are locked cracking the bleeder screw on airpak does nothing,but when i crack the...

Hard to explain with a keyboard,2000rpm,d turbo ,on highway you can hear it over engine noise,quiet in 4th,also in 3rd,seems to only be heard 2000rpm and up in 5th

What is the proper procedure to adjust the freeplay on the brake pedal,cant find in the Tm's

Paul, what viscosity have you heard may improve this??