NHTSA Campaign Id 71V190000; Date: Oct. 20, 1971
1969 Mack MB400; 1970 Mack MB400; 1971 Mack MB400; 1969 Mack MB600; 1970 Mack MB600; 1971 Mack MB600
Component: Service Brakes, Air:supply:hoses, Lines/piping, And Fittings
Manufactured by: Mack Trucks, Incorporated
Affected Units:: 916
May 1, 1969 thru Aug 17, 1971. Possibility that air brake pip ing has beenerroneously connected to hand control valve which , when applied, is to operateservice brakes on rear axle. Er roneous piping will cause braking to be onfront axle insteadof rear axle. Condition does not with normal functioningof s ervice or emergency brake systems. (correct by inspecting andinstallingproper piping where piping where necessary. )
Date Owners notified by Manufacturer: Dec 17, 1971
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