air brakes

2x4 · Nov 23, 2023

Freightliner FL 80 single axle dump truck has air brakes. Starter is out so can't run it but need to move it. Of course the air brakes locked up after sitting. Trying to find a way to put air in the tanks but see no valve as some have on tanks. There is a 1/2 plug in the middle of one tank. Is there a fitting that has a valve that will go in the hole?

Cash4Toys · Nov 23, 2023

Not sure about 1/2 inch, but you can get a Schrader valve in 1/4 inch, then a reducer.
It should have a spring brake on the rear axle, and most of them have a way to release them with a bolt of some type, varies with make and model of the brake, but then there are NO brakes at all!

johnofnewhaven · Nov 23, 2023

johnofnewhaven · Nov 23, 2023

johnofnewhaven · Nov 23, 2023

2x4 · Nov 23, 2023

what does this do?

Check Break · Nov 23, 2023

(quoted from post at 19:58:02 11/23/23) Freightliner FL 80 single axle dump truck has air brakes. Starter is out so can't run it but need to move it. Of course the air brakes locked up after sitting. Trying to find a way to put air in the tanks but see no valve as some have on tanks. There is a 1/2 plug in the middle of one tank. Is there a fitting that has a valve that will go in the hole?

So, if you don't cage the chambers or air up the tank, does it have glad hands and hitch. If it does, you can air it up by making an adapter out of a glad hand.

johnofnewhaven · Nov 23, 2023

It is a brake cage bolt. It will back off your air brakes. But when you use that you will have no brakes at all. It goes in the brake chamber like in the picture.

johnofnewhaven · Nov 23, 2023

If you're talking about back feeding
through the glad hands to air up the
truck I don't think you can do that
on newer trucks now. Like trucks made
in the last 15 or 20 years. Although
an FL80 might be old enough to where
you can do that.

johnofnewhaven · Nov 23, 2023

https://youtu.be/XVmRCPSVQrM?si=Ke7oKLiQrGHOwM9b

2x4 · Nov 23, 2023

OK thats your spring brake.

2x4 · Nov 23, 2023

no glad hand

2x4 · Nov 23, 2023

it's a 1999.

johnofnewhaven · Nov 23, 2023

Okay well if you have no glad hands then that's a moot point.

johnofnewhaven · Nov 23, 2023

Just remember you will have absolutely zero breaks if you cage your brakes.

2x4 · Nov 23, 2023

Got it. Thanks!

2x4 · Nov 23, 2023

That's the plan, no brakes. Thanks again.

johnofnewhaven · Nov 23, 2023

You can probably get those bolts at Napa or a truck supply store. You are very welcome.

wore out · Nov 24, 2023

(quoted from post at 22:08:38 11/23/23) You can probably get those bolts at Napa or a truck supply store. You are very welcome.

To the O.P., before dashing off to buy caging bolts, have a look at the spring brake chambers, there should be a set there, in the ''stored'' position (shown in the video) unless someone has removed and lost them, there would have been a set when the chambers were new.

r.w.b. · Nov 24, 2023

inspect the area where the cage bolt goes in for rust.if it is put piece of 3/16 or thicker over the end of chamber with hole for cage bolt. but first toss 2 blocks under wheel on 1 side. when you pull it you need somebody in it with clutch pushed down n in a gear using dead engine for a brake

air brakes

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