BENDIX BRAKE CHAMBERS User Manual

1
Bendix Brake Chambers
SD-02-1302
CLAMP RING
PUSH ROD
ASSY.
CLAMP RING
NUTS & BOLTS
INLET PORT
NON
PRESSURE
PLATE
SPRING
INLET PORT
PRESSURE PLATE
DIAPHRAGM
DESCRIPTION
The brake chamber is a diaphragm type actuator which
converts the energy of air pressure into mechanical force.
The diaphragm is held between the pressure plate and non-
pressure plate by either a one piece clamp ring or a two
piece clamp ring (Figs. 1 and 2).
Different size brake chambers are identified by numbers
which specify the effective area of the diaphragm. A type
30 brake chamber has 30 square inches effective area.
Since one side of a brake chamber diaphragm is exposed
to the applying air pressure and the other side to atmospheric
pressure, the chamber has a pressure and a non-pressure
side. The non-pressure plate is usually vented to atmosphere
with four holes, however, on those installations where the
chamber must be weather-proof, venting is accomplished
through a drilled passage in the mounting bolts and the rod
opening in the non-pressure plate is sealed by either a
boot or an o-ring seal.
The standard diaphragm material is a compound of natural
rubber with a fabric interior of nylon. Neoprene-nylon
diaphragms are optionally available.
Smaller chambers such as type 3 and type 6 have one 1/4
in. NPT inlet port in the center of the pressure plate. Larger
size chambers may have a center port and a side located
port or either one. Current production Type 20 chambers
and larger, generally have 3/8 in. NPT ports to facilitate
compliance with FMVSS 121.
LOCK NUT
YOKE
MOUNTING
BOLTS

BENDIX BRAKE CHAMBERS Specifications

General

Brand	BENDIX
Model	BRAKE CHAMBERS
Category	Controller
Language	English

Summary

Bendix Brake Chambers Overview

Brake Chamber Description

Explains the function, components, and materials of Bendix brake chambers.

Brake Chamber Operation

Preventive Maintenance Schedule

Monthly Maintenance Checks

Details routine checks for push rod travel, alignment, and mounting hardware.

Annual/High Mileage Maintenance

Outlines periodic disassembly, cleaning, and part replacement recommendations.

Brake Chamber Testing Procedures

Operating and Leakage Tests

Procedures for testing push rod movement, binding, and air leakage.

Brake Chamber Removal and Installation

Removing the Brake Chamber

Step-by-step instructions for safely removing a brake chamber from a vehicle.

Installing the Brake Chamber

Steps for mounting and connecting a brake chamber during installation.

Brake Chamber Disassembly and Assembly

Disassembly Process

General and specific steps for taking apart a brake chamber.

Cleaning and Inspection

Guidelines for cleaning metal parts and inspecting for damage or wear.

Assembly Process

Instructions for reassembling a clamp ring type brake chamber.

Testing Rebuilt Brake Chambers

General Safety Guidelines

Vehicle Safety Precautions

Essential safety measures to follow when working on air brake systems.