Air line size

USN_Green_Addict · Mar 20, 2019

Does anyone know where I can find these lines and fittings? Or is there a way I can buy them pre-bent?

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USN_Green_Addict · Mar 20, 2019

I forgot to put the rest of the post.
Went to move me truck today. I had 90 PSI of air, brakes were adjusted good. I only drove about 100 feet. Without any warning while sitting at a stop I presses in on the brakes saw steam come from the engine compartment and the brake pedal wasn't as firm as it was when I first started it up. Now when releasing the brake pedal I hear what sounds like air. I looked in the engine compartment and the air line that runs parallel with the air govenor line looks like it may have a kink. My airpack is freshly rebuilt. Any ideas of why this may be hapening or is it the possible kink?

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porkysplace · Mar 21, 2019

Taborljoshua said:
Does anyone know where I can find these lines and fittings? Or is there a way I can buy them pre-bent?

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Doubt you will find them pre-bent , they are just copper tubing with ferals , the nut is re-usable but you will need new ferals . You could replace the with plastic tubing rated for air brakes , if you have a Parker dealer near you they should have everything or your local heavy truck parts supplier .

porkysplace · Mar 21, 2019

Taborljoshua said:
I forgot to put the rest of the post.
Went to move me truck today. I had 90 PSI of air, brakes were adjusted good. I only drove about 100 feet. Without any warning while sitting at a stop I presses in on the brakes saw steam come from the engine compartment and the brake pedal wasn't as firm as it was when I first started it up. Now when releasing the brake pedal I hear what sounds like air. I looked in the engine compartment and the air line that runs parallel with the air govenor line looks like it may have a kink. My airpack is freshly rebuilt. Any ideas of why this may be hapening or is it the possible kink?

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Are you losing brake fluid ?

USN_Green_Addict · Mar 21, 2019

Yes brake fluid is coming out the vent. Pic is of what happens when the brake is released and at 90 psi. Hard to tell without the video playing you can see it coming out of the vent. And yes air tanks were purged prior.

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doghead · Mar 21, 2019

Please attach pictures, not link them.

doghead · Mar 21, 2019

Your air-pack has failed.

77 AMG · Mar 21, 2019

You might as well go ahead and replace the compressor to regulator line, and the 2 under the dash while you are there... I had air leaks at the pressure gauge AND the front axle switch. Cost less than $25 to fix them all... Air leaks SUCK. Especially on a system that uses air pressure for ALOT of things. Plus, field repair capability majorly increases with the new Nylon based lines, as opposed to the old copper stuff.

USN_Green_Addict · Mar 21, 2019

doghead said:
Your air-pack has failed.

Is it typically just the plunger? Or could it be another part? I just bought one from seco parts in Georgia. Supposedly a new assembly.

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USN_Green_Addict · Mar 21, 2019

Company said only 30 day warranty and offered to discount me another one for $375. It lasted January till today and 150 ish miles.

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davidb56 · Mar 21, 2019

Got to a store in Utah, pay 125$ more,(500$) and get a REAL warranty.

Air line size

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