CalebB

5 minutes ago, D-Day said:

It may be a quick release valve I hate it when I find a quick release valve that someone put in to split the brake line down to the service brakes they can stick open while driving and then you have no brakes there should just be a T there, quick release valves are more suitable for the parking brake if equipped with the bigger double brake chambers

Ok so what do I need to do to fix it?

Well I got all the air lines cleaned out and it makes 120 psi, but I’ve got a new problem. When pressing down on the brake pedal, there is air shooting out of what looks to be an exhaust for the air brakes. There are two of them but only one is spewing air. I can provide a picture if needed.

10 hours ago, Hayseed said:

Welcome,  Caleb. I'm Sure We'll get your Truck issues sorted..

 

After sitting for that length of Time the entire Air/Brake system will need a good dose of TLC, to ensure It's safe to use..

I'd see if you can use some "Shop Air" to pump up the Tank & Test if the Brakes ect are working as they Should. 

I'd also ensure that the Brass/Steel line directly out of the Compressor isn't Carboned up. The unloader valve sticking has already being Mentioned..

Just methodically go through all the Basics before spending money on a another Air compressor. would be My advice...Tax free Today..lol

I hadn’t thought of pumping up the tank with shop air. I’ll try that when I get off work!

39 minutes ago, Freightrain said:

Need to confirm it is a 500 pump.  Then make sure it doesn't have a drier hung on it?  About the size of a coffee can with line coming from compressor and going back to tank.

 

Yes it is a 500 pump. It does not have an air dryer.

1 hour ago, Onyx610 said:

Even bad compressors will build air. Try what 67rModel said and hook a gauge to the tank and see what it says? 

I’d assume it’s reading correctly because I have no brakes. Also, if it has an air dryer, I can’t find it. This is my first B-model restoration. I’m a wiz with engines and transmissions. I know the basic principles of air brakes, but I’ve never had to work on them before so I’ll admit I’m a little out of my league.

1 hour ago, Onyx610 said:

How big of circle did you get?

About 1 1/2 in circle. The compressor was blowing well it seems. That’s what’s throwing me off. It gets air to the tank, governor, and toggle switch well. As soon as you turn it off, it’s dead quiet. No leaks.

2 minutes ago, Freightrain said:

Yup, kinda figured that is what happens.

Here is picture of typical 500 model.  The upper round port is exhaust pipe to air trank, it is typically a copper line.

The two unloader valves are accessible through the intake port below the exhaust.   My compressor has a small box bolted on with a wire mesh filter screen installed.  Many newer trucks have a feed line from the air filter/turbo inlet pipe.

So would it be beneficial to check the intake for any trash, gunk, etc? The truck has not been on the road since 1997. Also, Onyx, I did the little test you recommended and it’s not blowing as much oil as I originally thought. It’s still probably a more than ideal amount though.

3 hours ago, Freightrain said:

Compressor might be just plum wore out if it has sludge in the air tank.

Mine was pumping oil, it would make pressure, but just slobber the tanks so had it rebuilt.

Yours likely will be a Tu Flo 500 like mine.

I think you may be on to something. There is a small amount of oil coming from the lines but the compressor does pump air. Where would be a good place to get it rebuilt?

Hey everyone. I just purchased a 58 B61 about a week ago. I’m having some issues with the air system. It will only build up to about 20 psi. There are no audible leaks in the system. I replaced the air governor, but no change. I drained the air tank and it had a lot of water and sludge in it. I’m no genius with air brakes so any help is much appreciated. Thanks!