Caging brakes is only done when an air brake system failure has happened and you need to get your unit to a safe haven only, not normal operation.  This procedure releases the spring tension within the brake chamber and will render that wheel with no brakes when completed. 

I recently had a problem with my air spread axle on my step deck trailer that caused my brake system to lock up on the sliding rear axle.  It ended up being a air valve failure that couldn't be fixed on the side of the road anyway.  I had to cage the brakes on both sides of my rear sliding trailer axle.  Since I was empty, I had enough braking power on the other 4 axles to safely travel to the nearest shop and get repaired.  This saved me quite a bit of money for avoiding a service call.
  • To do this, crawl under truck or trailer and find brake chamber to the wheel with brakes you want to release. 
  • On the chamber itself, you'll find the internal hex pipe plug.  It'll be mounted on the clamp of the brake chamber.  Remove the nut, washer and tool from the holder.
  • Remove dust cover from brake chamber
  • Insert caging tool into chamber and turn 1/4 clockwise to seat the tool
  • Insert washer and nut
  • Tighten to about 2.5 inches of caging tool exposed.  This is hard work as you'll be compressing that spring by hand.
  • At this point, your brakes should be released on that wheel.  If not, continue to turn until released
Remember, this procedure is not for normal operation, but to get to a safe haven where repairs can be performed.  Stay safe out there!

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Comment ()


Yeah, I've had my share of bad luck. Thankfully, it could've been worse with a service call to pay for!

June 09, 2014 19:16:31 PM

That does not look like fun. You are supposed to be having a better time than this while you are working Joey.

June 09, 2014 18:51:23 PM

Thanks for reading Tyrone. I hope you never need this!

June 08, 2014 18:11:19 PM

Thanks for the tip!

June 08, 2014 17:39:59 PM

Thanks for the nice comment Lorence.

June 08, 2014 14:50:05 PM

Wow Joey! Thanks for teaching me how to do something new!

June 08, 2014 12:12:38 PM

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About Joey Slaughter

Joey Slaughter is the owner of Blue Ridge Transport, LLC. Joey has been in the trucking industry since 1992.

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