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Alert: Delayed Response on Parking Brake

Posted By Kerry Clines On June 3, 2009 @ 8:24 am In Aggbeat Online | No Comments

The automatic emergency-parking brakes on some Bucyrus 848 Un-A-Haulers may take 4 to 5 seconds to activate after the panic bar is hit, according to a safety alert from the Mine Safety and Health Administration. When this type of equipment is field tested, the brake must engage within one second after hitting the panic bar. As a precaution, the 848 Un-A-Haulers should be field tested to determine if the brakes activate immediately (within one second) when the panic bar is hit as required by 30 CFR 75.523-3(b)(1).

Bucyrus has issued a bulletin describing a remedy for the delayed brake activation, which consists of replacing the brake solenoid valve with a replacement solenoid valve and a pilot-to-close check valve. For more information, go to [1] [1]. Contact a Bucyrus representative with any questions. 

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URL to article: http://www.aggman.com/848-un-a-hauler-aepb-systems/

URLs in this post:

[1] : http://www.msha.gov/Alerts/Equipment/Bucyrus848062009.pdf

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