Brake chambers are a device that allows compressed air to be converted into mechanical force. They are used on the air brake system of heavy-duty vehicles. Brake chambers are known by many terms including air brake chambers, maxi chambers, brake cans, and spring brakes.
How can you tell the difference between standard and long stroke brake chambers?
The type of brake chamber, in terms of its stroke, is determined by looking for visual identifiers that indicate it is a long stroke chamber. The absence of a recognizable long stroke marking requires the inspector to deem the brake chamber to be a standard type and not a long stroke type.
What is the service side of a brake chamber?
The top of the chamber is the service side, which will activate when the tractor brake pedal is stepped on. The spring brake chamber or emergency brake chamber, is charged to release the spring brakes.
What is a piggy back brake chamber?
The rear chamber houses a large, powerful compression spring and diaphragm and performs emergency and parking functions. It is sometimes called a “piggyback.”
When brake chamber push rod stroke exceeds the adjustment limit?
Inspection of brake adjustment at each wheel should be performed with air pressure between 621 and 690 kPa (90 and 100 psi ), the engine shut off and service brakes fully applied and spring brakes must be released. When pushrod stroke exceeds the adjustment limit of the brake chamber the brake is out of adjustment.
What are the components of a brake chamber?
The components of a brake chamber are housed in a round canister sealed by a clamp. Brake chambers come in two main types, service chambers and spring brakes. Service chambers apply the brakes when air is applied to the chamber and return via an internal spring to a released position when the air is removed.
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How do I identify a long-stroke brake chamber?
There are a few ways to identify a long-stroke brake chamber. A part number or serial number on the chamber will contain “LS” The air inlet or inlets will have a square boss Cast in instructions such as, “USE 3-INCH STROKE DIAPHRAGM ONLY”
What is a caging bolt on a spring brake chamber?
Every new spring brake chamber includes a new caging bolt and any damaged or worn caging bolts should be immediately discarded and replaced. A caging bolt is crucial to safely working on spring brake chambers. Service chambers and spring brakes will come in a standard stroke and a long stroke variant.
