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Year:1979 Make:WESTERN Model:RS SERIES
Manufacturer Component Mfg Component Component Description Consequence Corrective Action WESTERN PRODUCTS MACK TRUCKS, INCORPORATED SUSPENSION:REAR:SPRINGS 19810806 INADEQUATE WELD POSITIONING COUPLED WITH RADIUS ROD LOAD AND LOOSENING OF THE SPRING CLIP NUTS COULD CAUSE SPRING SEAT FRACTURE. THIS CAN RESULT IN LOSS OF DIRECTIONAL CONTROL OF THE AXLE. SPRING SEAT RADIUS ROD BRACKETS WILL BE INSPECTED AND REPLACED IF NECESSARY. IN ADDITION, SUPPLEMENTAL BRACKETS WILL BE INSTALLED TO REINFORCE THE SPRING SEAT, WITHOUT CHARGE. WESTERN PRODUCTS MACK TRUCKS, INCORPORATED SUSPENSION:REAR:SPRINGS:LEAF SPRING ASSEMBLY 19840323 SPRING SEAT CAN DEFORM, WHICH CAUSES A DECREASE IN THE CLAMPING FORCE IN THE SUSPENSION ASSEMBLY. LOSS OF CLAMPING FORCE MAY BRING ABOUT AXLE MISALIGNMENT OR AXLE HOUSING FAILURE. THE AXLE HOUSING WILL BE INSPECTED AND REPLACED, IF NECESSARY. THE SPRING SEATS WILL ALSO BE REPLACED. WESTERN PRODUCTS MACK TRUCKS, INCORPORATED STRUCTURE:FRAME AND MEMBERS 19851126 THE RIGHT HAND FRAME RAIL LOWER FLANGE COULD DEVELOP CRACKS DUE TO POOR GRINDING METHODS AT STRESS POINTS. CONSEQUENCE OF DEFECT: FRAME FAILURE COULD OCCUR WITHOUT WARNING AND COULD RESULT IN LOSS OF CONTROL AND POSSIBLY A CRASH. REMOVE AND REPLACE FRAME RAIL AS NECESSARY OR GROUND OUT AND DRESS TO ELIMINATE ANY STRESS RISERS THAT MAY DEVELOP. WESTERN PRODUCTS MACK TRUCKS, INCORPORATED SUSPENSION:FRONT:SPRINGS:COIL SPRINGS 19791228 THE INVOLVED VEHICLES FAIL TO COMPLY WITH FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 204, "STEERING CONTROL REARWARD DISPLACEMENT". THE ALUMINUM FRONT SPRING REAR BRACKET IS SUBJECT TO BREAKAGE. THIS BRACKET, ALONG WITH THE TAPER LEAF FRONT SPRINGS, ATTACHES THE SPRING SHACKLE TO THE CHASSIS FRAME. DEALER WILL REPLACE THE PRESENT ALUMINUM FRONT SPRING REAR BRACKET WITH A REDESIGNED SPRING BRACKET CONTAINING A REINFORCING RIB. -
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Source: National Highway Traffic Safety Administration(NHTSA) and U.S. Department of Transportation. Send Feedback