Mark T

Almost looks like an old REO Gold Comet missing a couple things

Are you sure the radiator isn't dirty on the outside ?  As in plugged up with dust and such between the cooling fins, not letting air flow through it as it should.  Maybe that fan is working exactly like it should ?

I think he means as in "P" pump.   like a P7100 can basically be what's on stuff like a Mack (right) or a 5.9 (left) 

If that's the case he'd be best not to attempt it himself (lol) 

(lol)   if that's a "normal day" ??  WOW      looks like it needs to be bushed, let alone that bracket for the side torque arm doesn't belong on there on that front rear

Don't take this the wrong way OD, but anyone who would turn a truck in looking like yours did ???  I bet well within a year someone'll need a guy in a pinch here n there, and you just might take them up on it. Hope you enjoy yourself what ever you decide to do

10 hours ago, Rob said:

I really don't know the differences between many of them except the AD-2 which is very tall and thin when compared to the others. I had several AD-4 series on my trucks and those are really the only ones I've messed with meaning routine service. This AD-9 was given to me by a friend whom retired and closed his shop. It is new but several years old.

4 and 9 both work well with a volume of air to accommodate something with air ride and all. The 9's desiccant cartridge just screws into the aluminum base as  opposed to having the plate and 4 allen screws (little easier to change) I'm pretty sure there was something about a valve in the 9 that was engineered with compressors that had their intake from the engines intake on turbocharged engines (? like a E7 pre EGR)  

Didn't the AD 9 have a valve that was friendly to turbocharged compressors ? ( ones fed from the intake manifold )

Give them a good liberal prick punching (yokes) and use that green stuff, might be ok for a hobby truck for a little while.  Really have little to lose other than time, as replacing them is only thing to actually fix them

don't forget as Rob said it needs to be supported that requires teflon P clamps as well to put up with the heat 

Is the radiator clean (externally) ?  Not blocked up with dirt or something ? not allowing air to flow through it.

Those Berr fans were supposed to be stored in a certain position  ( I think this applied to all viscous fan drives ) that no one seemed to pay attention to.  There was a way they had to be hot wired and ran at a certain RPM until they would spin free , then they would work. I remember that paper coming in the package with a new one.

There's one extended range that's a five speed with a second lever, but the high in the second lever only works in the main in  4th and 5th ?  IDK what model it is, but one of those and 4.17s ???   It'll have some top end then (lol)

What you're trying to accomplish may require a different rear gear and an overdrive transmission . 

3 hours ago, SkippyMack said:

Yes!  We share a birthday!  I'm 43 on Sunday.  I'm just hoping not to cook that day!!  Ribs sound great. 🤩

4/18    a great day to be born ......worked for me too 

Doesn't that hose have a screen in it ? Or was that on newer ones 

Must be all the cool people were born on the 18th.

1 hour ago, Joey Mack said:

i wish mark and i were thier..  we'd get it done..

and let him buy us steaks or pizza 😃

45 minutes ago, Dmurph2016 said:

Didn’t see any, I’ll have to get some wood under there and do some looking around 

That's a J & J  there's a body prop right to the left (driver's side) of your hoist. That should swing up into position and will stop an EMPTY body from crushing you.   Trust me on this one kid.... if you have enough brains to figure get'n under an unsupported body is a lousy idea ?  you can probably do better finding an air leak than you think

Yes   the truck was made with the tanks that look to be aluminum. Then someone added the two.  Are you sure one of those two doesn't have a tiny hole rotted through ?

It looks like someone added air tanks  parallel to the frame.  Those most likely supply all lift axle related air

Empty , a block of wood of some size . Yes the turquoise thing is the dryer

The soapy water trick will get you results.  Once you get the hang of it, then maybe a picture of the leaky area or component ???

1 minute ago, Dmurph2016 said:

There is no air in the system so the axkes dropped, or they are overstretched? I’m not sure what that would look like? 
whays the ride back quick release? And what does the solenoid look like

You have to understand, lots of guys are willing to help, but it's not easy without being there ( lol ) the solinoid ?  Depending make ?? They all look a little different. So not easy to describe other than it'll have airlines and a wire or two.  But even if the axle has a tiny leak and something else on the same tank leaks more... there's not enough air to keep the axle up

That's probably a picture after it sat and bled down.  Really doesn't determine anything about where the leak is