CAGING: WHY & HOW / CUTTING A PUSH ROD
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. • 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
Remove Dust Plug
Release Tool
Spring Brake (Service Side)
Remember, this procedure is not for normal operation, but to get to a safe haven where repairs can be performed. Stay safe out there!
Garage Gurus Video on Caging Brake Chambers:
How to Properly Cut a Push Rod: (Service Brake Chamber or Double Diaphragm Spring Brake Chamber)
Gunite: How to Cut a Push Rod Video
Haldex: How to Cut a Push Rod PDF
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