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Steering & Suspension (continued)

Pressurized brake boosters are pneumatically charged devices in the vehicle’s anti-lock braking system (ABS). They use nitrogen or another non-flammable compressed gas to provide additional braking force to “pump” the brakes in order to avoid wheel lock-up while allowing the wheels to continue to turn. These accumulators, or gas springs, are typically charged to several thousand pounds of pressure and are, therefore, regulated as: UN3164, ARTICLES, PRESSURIZED PNEUMATIC, 2.2 These devices are entitled to significant regulatory relief and, for all intents and purposes, are not regulated for transportation by any mode if they comply with the provisions of 49 CFR § 173.306(f)(4).