MACK MB400 1974: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER

Make : MACK Model : MB400 Year : 1974
Build Dates : 1972-07-01 - 1977-01-01
NHTSA CAMPAIGN ID Number : 80V073000
Date Owner's Notified: 1980-09-10 Date Received by ODI: 1980-06-11 Date Added to Database: 1980-07-29
Manufacturers Involved: Chrysler (FCA US, LLC) (Stellantis)
Manufacturer's Responsible for the Recall:
Manufacturer Campaign Number:
Component: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER
Potential Number Of Units Affected : 350000
Summary:
      DUE TO A COMBINATION OF DISC BRAKE PAD WEAR AND TURN STOP WEAR ON CERTAIN VEHICLES, THERE MAY BE AN INCREASE IN BRAKE PEDAL TRAVEL AND A REDUCTION IN FRONT BRAKING EFFECTIVENESS FOLLOWING A FULL TURN. ALSO, A FRAME CRACK COULD DEVELOP AND COULD EXTEND THROUGH ALL OR MOST OF THE RAIL SECTION.
Consequence:
     
Remedy:
      UPON INSPECTION DEALER WILL REPLACE EITHER THE LEFT OR RIGHT TURN STOP BRACKET TO CORRECT THE FRONT BRAKES. IF FRAME IS CRACKED IT WILL BE WELDED AND A ROD REINFORCEMENT WILL BE INSTALLED OVER THE CRACKED AREA.
Report Initiator: ODI V Report
Regulation Part Number: Federal Motor Vehicle Safety Standard Number:
Notes:
      VEHICLE DESCRIPTION: LIGHT TRUCKS.SYSTEM: SERVICE BRAKES; FRONT WHEEL DISC BRAKES, STRUCTURE; FRONT FRAME RAILEXTENSION.CONSEQUENCES OF DEFECT: THE REDUCTION IN FRONT WHEEL BRAKING EFFECTIVENESSCOULD RESULT IN A VEHICLE ACCIDENT IN SITUATIONS WHICH REQUIRE MINIMUM STOPPINGDISTANCE. IF AN EXTENSIVE CRACK DEVELOPS IN THE FRAME RAIL, INCREASED STEERINGSYSTEM PLAY AND DIFFICULTY IN HANDLING OF VEHICLE COULD ALSO LEAD TO ANACCIDENT.NOTE: A CRACK IN THE FRAME MAY BE ACCOMPANIED BY A METALLIC RATTLING NOISE ASTHE TWO EDGES SCRAPE AGAINST EACH OTHER.