Mark T

I can almost remember those trucks on The NE Extension and thinking the bags were way over stretched.  Like no rolling lobe action at all. Would make sense bags could be shot

That looks like an HLM   so it's air up air down...and it looks huck bolted, so probably from the modshop and has a solinoid somewhere

1 minute ago, Joey Mack said:

Isnt that used on this chassis  for the VGT air supply? I need to look back at the year of this truck now.. i forgot. 

Mack liked that valve, they used it on several things that weren't brakes and used air

3 minutes ago, Dmurph2016 said:

Isn’t that the valve that I just replaced? Not on the tank though. I’m going to assume the way it is setup is the way the body manufacture set it up, not sure why you’d go messing with what’s on what system?

That little red cap valve ??   That truck can ( and likely does ) have more than one. Might find one on an air tank you can see from under the truck .  And they could be on either system.  Make liked that particular brand back in that era

Often brake chambers can blead back from side to side especially those cheap gold ones. Might be what's causing the inversion valve leak ?  He said he had a leak upon brake application in the rear and the front is actually rotted to the point of having a hole.  The lift axle ?  Hard to say what arrangement is on that. Could be electric over air or all air ....or maybe even a make that doesn't even use air to lift ( like Neway)   need some pictures of this unit 

I'm think'n that no matter what's leak'n on your truck ??  do yourself a favor and replace all four air chambers on the back of it.  I'd suggest 4 MGMs . They cost a lot, and if you don't know how to change them you'd be best to let someone who does. You really can't go wrong with new chambers....unless you don't know how to change them. Between putting air lines back on and cutting the push rod to the correct length, let alone it's not impossible to hurt yourself with the parking brake they're nothing to play with unless you know.  I think some of your leaks are from the air chambers . those gauges dropping with the application look about normal ???  

I think that's the reversing relay for the puff limiter and the line going to the puff limiter taped up

The ones I'm thinking of were kinda nice. A few used ones ended up around where I'm from. They were nice used trucks,and there's still a couple around

They used to run around south east pa and nj.    They had trucks similar to yours 

1 hour ago, Dmurph2016 said:

I figured that there had to be an air dryer but I’m just not seeing it. The guy I bought it from had a few other trucks that he ran, so I am not sure if the drivers were just lazy or what. I will admit I’m new and clueless so I may have overlooked some things when I looking at it, but hey nothing I can do but fix and move on. Chalk it up to life lesson.

attached is a photo of the truck.

 

That looks like an old Capone truck.

I'd get the red thing from your dealer by the VIN of the truck . I've seen them at parts places, but not sure the port sizes will be direct replacement on your's.  Charging the truck from shop air ?  not much chance you'll hurt anything. Joey's idea about going in the compressor discharge is a good place, and when it hits @ 120 you'll hear your air dryer go off. ( if you're worried about too much )  Likely charging in the primary tank won't hurt either.  If this truck has leaks from valves you may want to consider finding that air dryer and replacing the desiccant at least.  Only reason I suggested the governor  was it's marked and probably easier to get at....and air will go in the truck much slower through a tire valve in one of those little ports.

I'm going through the same thing. The dealer here just put two on a tractor that came with painted ones.  I also see new trucks on lots with them and a variation of the same mirror without the lights.  They exist....but getting them ???

The CLs I had, the air dryer was right in the area about where the back of the transmission is. Mounted inside the frame. ( this doesn't mean your's is )  Yes the tire valve you mentioned, you can put shop air in there. The cutoff/ regulator ( thing with red cap ) if it's leaking, it's shot.  The brake air leak is likely a diaphragm in a service chamber

3 hours ago, Dmurph2016 said:

So I only had a few min today to use the soap and water before the weather turned to rain, but here’s what I got done. 
stsrted the truck and let it air up until the governor shutoff. Shut the truck off. Could hear some air leaking from the front of the truck, o opened the hood and started spraying airlines. Not exactly sure what this thing is or does but it was bubbling at the red part. Secondly I confirmed that when I flip the switch to drop the lift axle, the green needle dropped. So it seems that there’s a leak somewhere in that system and when it loses pressure, the axle drops. It’s a start. Hopefully when the rain stops o can lift the bed up and start checking under there. As well as the brake cans as I have a feeling that could also be a culprit 

That's a cutoff for if the air drops too low. It's purpose is to stop air from going to something less important than brakes. ( like suspension ) they're regulated and colored for how many pounds they allow.  With the truck shut off ? The gauge should drop as the lift axle is put down ( air's going to filling the bags )  there's reservoir ports on the govener that'd probably be really easy to charge the truck with shop air

Anywhere there's air, there could be a leak. Your truck has two air systems, primary and secondary. Depending who tapped into where over time it's hard to guess what besides brakes comes from where.  Grab the soapy water and put it in an old Fantastic sprayer (or something)  After you find an air leak (look for the bubbles and different sound when it gets wet)  you'll catch on quick.

That small picture of the dash looks pretty clean, I think maybe some pictures of the whole truck might help 😏

Sounds like maybe something with that lift axle is the biggest problem, but it actually depends on what else is on that system. IDK if that's primary or secondary on your truck. You're gonna need to listen and start squirt'n soapy water . Once you find one ....you'll catch on fast how to find an air leak.

Fix'n it ???   well that's another thing

Do you really need to run ducting for the tip fan in this day and age ?   Seems like K & N or someone should have some form of filter that would be easily adapted to it and not take up much space . (think like cold air intake on a Dodge)  just a thought

10 minutes ago, AMGeneral said:

It is a blast to drive, I have put almost 500 miles on it in the last couple weeks hauling logs, stone, and equipment out to the property we are moving to, It always gets stares, thumbs up and Huge grins from people as I pass by, The only ones who don't enjoy it are the cars behind me as I get up to speed.

 

I usually start out in 1st direct, then progress up through the gears till I hit 4th Hi split at 38 mph, the reach over, shift to 5th and let the dog pull!👍

Ya big tease 

🤔 something familiar about those pictures 

"oops" ?  I think I speak for a couple of us that really appreciated that post.  🤔

They were .Ade by Trucklite 

They do come on new trucks and they're waiting for the new supplier.  Least that's what I'm told

He's gonna be a little harder to get rid of than Pepe.....for doing the same thing 

Are you certain your air chambers aren't leaking internally ?

IDK about where you live, but it's not uncommon here for them to rot under that plastic piece you found broken.