The annual Commercial Vehicle Safety Alliance (CVSA) Brake Safety Week, aimed at reducing the number of highway crashes caused by improperly maintained or faulty braking systems, employs a Brake Safety Week campaign – also known as Operation Air Brake. This program includes teams of CVSA-certified inspectors to conduct roadside checks of commercial vehicles and their drivers.
The program targets commercial vehicles in the United States and Canada, and is conducted in partnership with the Federal Motor Carrier Safety Administration (FMCSA).
According to CVSA, more than 30,800 vehicles were inspected during Operation Air Brake in 2011, more than any other year since the program's inception in 1998. More than 30 percent of the vehicles inspected were placed out of service for reasons related to their braking systems.
"Fleets, drivers, and owner-operators have a shared responsibility to keep roadways and commercial vehicles safe for everyone. Bendix applauds and shares the CVSA commitment to Brake Safety Week and improving vehicle maintenance and inspection," said Fred Andersky, Bendix director of government and industry affairs. "Campaigns like Operation Air Brake reinforce the importance of equipment upkeep and technician training. With CSA (Compliance, Safety, Accountability), successful inspections are more important than ever for both drivers and fleets."
To prepare for Brake Safety Week, Bendix advises fleets and drivers to familiarize themselves with the CVSA inspection requirements and procedures. Operation Air Brake targets six items for inspection: driver's license, registration, low air warning device, pushrod travel (chamber stroke), brake linings/drums, leaks/air loss rate, and tractor protection system.
"At Bendix, we emphasize the importance of conducting regularly scheduled preventive maintenance and pre-trip inspections," said Gary Ganaway, director of marketing and global customer solutions for Bendix Spicer Foundation Brake LLC (BSFB). "For Operation Air Brake, pre-trip brake inspections take on added importance. We suggest that drivers test for leaks, examine brake shoes, and measure chamber stroke in accordance with Technology and Maintenance Council (TMC) and industry standard practices."
BSFB is a joint venture between Bendix Commercial Vehicle Systems LLC and Dana Commercial Vehicle Products, LLC.
To check for leaks, Bendix suggests a 90 to 100 psi brake application, followed by a walk-around inspection of the vehicle, while listening for audible leaks. The CVSA inspection will also test the vehicle's low air pressure warning device, and, if a leak is detected, measure the air loss rate.
Brake shoes should be examined for cracks and checked to ensure they meet the minimum lining thickness standards.
To measure the chamber stroke on each wheel-end, Bendix typically recommends checking the distance from the chamber to the pin with the brakes released, and again after a fully charged brake application. Drivers can incur fines if the difference between the two measurements – the chamber stroke – is outside allowable limits on 25 percent of a truck's wheel-ends.
For foundation drum brakes, fleets should follow the manufacturer's instructions regarding the adjustment of slack adjusters.
In conducting general wheel-end inspections, Bendix emphasizes close attention to the rubber boots on brakes, where cracks or tears could allow moisture to get inside.
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