Joey Mack

you can take a red glad hand and screw a shop air line nipple into it and hook it to the trailer, and charge the trailer, without the truck and test it... the trailer can also be the issue, if the issue exists when hooked to the trailer.. either way, it would be good to test the trailer, since you just said that it happened when the trailer was hooked up.. jojo

the coupler on the wet tank, will allow you to charge the air system.. good deal..

you are doing the best you can,, just be aware of wasting your money at shops.. You seem to be be quite smart... rely on yourself just like you are doing.. I beleive you will fix this issue.. try to isolate the truck from the trailer, to help in the repair. are you able to hook shop air to the truck, so that it isnt running, and making a lot of noise while you look for the issue? im trying sir, even though I said I was 'out'... i guess i;m never really out.... jojo

OK.. I said that I was out.... But really sir,, you need to slow down.... this is not as big'a deal as you have been posting.. It's not "Rocket Surgery"... Just for kicks,, replace all the cans and the valves, and then you will find out that there was a crappy dash valve... anytime air is delivered based on the key switch means its electric over air... however, you need to have a stored supply of air over 90 PSI... so now???? does the truck leak down over night or in an hour?? or what??.... I feel like you have a small amount of knowledge, and folks are taking advantage of you..... Please keep trying to fix this yourself.. You really need to pay attention to what Glenn Akers said, and a few others.. jojo

thanks Bob,, I'm just fine... Not even mad at me, I have done dozens of these. there was obviously a weak spot that decided to show up yesterday.. My customer can afford a tranny, so I will do my best to fix this as good as I can with some reused parts.. I got this.... Jojo

well the gears are good, the back box cover is junk. i will have to cut the yoke off, but i need to check the price of the yoke and main shaft, before I use $50.00 worth of oxy. acetolene.. I will also be looking into a complete back box as a unit.. that will be more cost effective at this point, of course with todays crazy pricing, I may need to just replace the whole tranny... It used to be a lot easier to determine repair costs on Eaton tranny's.. I'll let you know.. Jojo

Thanks Dave,,,,, Wil do.... jojo

$166.00/hr. here in Salisbury N.C. at the itty bitty MACK dealer here..

sir,, with respect, I have to bow-out.. seems to me you have a home made truck, and the only way to get parts is like I said, with the component serial numbers.. and I am sure you will always have to remove the bad parts and take them with you, to the parts store.. I pray that you have NON-Mack parts store's that know what they are doing.. I suggest you record all of the data of of any data plate you find, ie: tranny/ engine/ rears/ axle housing's/ front axle beam/ steering box/ the v.i.n. on the frame rail/ the v.i.n. on the cab shell/ etc... this effort will help you later on.. God Bless you sir.. Jojo

if you have a good Mack parts guy, he can tell you what it was built with... when major components are replaced, like the engine, tranny, and rears for example,, you need to use the serial number of the part and not the v.i.n.,,, just sayin'...jojo

Wrong maxi's.. those are for drum brakes...

the last pic, with brakes 'on' is the measurement you need to duplicate..it looks like pre-made brake chambers, with welded yokes.. he is right about not going passed 90 degree's.. my guess is the new maxis you have dont have threads all the way down to the service side housing??

it's smoke and mirrors, for 2024... there will be more to come.. Guns are currently the next one, white skin will continue to be an issue, and the words Boy and Girl will be an issue, and of course,,,, funding!!.. funding!!.. funding!!.. I also expect a shortage of rainbow patterned cloth, as well.. shoot, dont forget a new "Variant" pick one... Luv u, jojo

MACKS, you must have heard me... 'Cause when it popped, thats exactly what I said... jojo

honestly, it is now easier for me,, I can just take my torch and cut it apart, and start fresh.. I will have to cut the yoke of, unless I can get a main shaft and yoke for a good price.. .. Heck I never have bought a complete back box before.. can that be done? I have always just re-built them..

Well here's first time for me... I have done dozens of these and at times had to use a sledge hammer and a helper to remove the yoke.. But, never has this happened.. I had it in my Harbor Freight 20ton press, with pressure on it and i was heating the yoke with my torch.. and when the tone ring was able to spin I gave it 2 more pump's, and WHAM!!! I cant wait to tell my customer... jojo

replacing all the brake chambers is a good idea, maybe as you do it, perform the test that Glenn suggested, so that if you find the issue, you get the answer to the mystery, and the brakes have all new cans of equal quality.. good luck, Jojo

I am at a bit of a loss.. i dont know how , truck off or on has an effect, unless there is an electric over air switch.. Im sorry, it is also 9:30 PM here and I need to hit the sack.. I will check back tomorrow... jojo

oh hell, the small one is likely a pressure protection valve, and the other one should be the anti compounding valve. My guess is you have a bad maxi, if the plumbing is correct..

the second valve should be the service valve... the one that applies the brakes when you step on the pedal.. the first pic is the park brake valve... Did you do what Glenn asked, and remove a service line from each brake chamber until the leak stopped? you may have a backfeed through the maxi..

ok,,, disc brakes.. I guess thats why, no room for big chambers.. I didnt know the year/model of the truck... jojo

just curious,,,, why such small maxi's? why not 30/30's?

the brake valve is bad... it gets constant air pressure to it as long as there is air to be delivered.. the spring brakes dont have air pressure in the chamber until you push the brake release valve in... on the brake valve in the frame, there should be an air supply line, and a signal line ( brake release valve line) and 2 or 4 lines off the bottom to the rear chambers on the maxicans.. more pictures are always a good thing,.. jojo

So Roe-v-Wade, is overturned.. Ok.. well... the only people that are pissed off are those that want to make money off of abortion's, and those that use it as birth control.. There will always be a 'real' reason for an abortion, IE: saving the mothers life, especially if she already has a family of children, and need 's to be here taking care of them.. I really dont have a lot to say on this. However, I did see where they incorporated, 'Gay right's' and Racism, into this issue... well at leaste here in Charlotte, N.C. and of course all of this is being staged to try to destroy the republican vote this year and in 2024. ok, time for me to take a break... jojo

I found a used one on E-Bay.. $1,000,000.00