STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
THE STEERING GEAR MOUNTING BRACKET WELDS MAY CRACK UNDER CERTAIN STEERING LOAD CONDITIONS.
Remedy: REPLACE STEERING GEAR MOUNTING BRACKET WITH A REDESIGNED BRACKET.
241 vehicles affected
STRUCTURE:BODY
CORROSION OF THE GRABHANDLE AT ITS MOUNTING SURFACE MAY LEAD TO CRACKING OR LOSS OF STRENGTH.
Remedy: REPLACE GRABHANDLE AND ITS FASTENER WITH IMPROVED GRABHANDLE; ALSO, INSTALL GASKET BETWEEN THE HANDLE AND AIR STARTER RESERVOIR.
3,219 vehicles affected
STEERING:LINKAGES
STEERING ARM MAY FAIL IF USED ON EATON EFA12F4 FROM AXLE IN CONJUNCTION WITH ROSS HFB70 POWER STEERING GEAR.
Remedy: INSTALL A NONADJUSTABLE 1500 PSI POWER STEERING PUMP PRESSURE RELIEF VALVE TO LIMIT STEERING ARM FORCES. REPLACE STEERING ARM WITH A DESIGN CAPABLE OF WITHSTANDING HIGHER FORCES. ADJUST MAXIMUM POPPET VALVE SETTINGS TO 500 PSI AND ADJUST AXLE STOPS.
92 vehicles affected
STRUCTURE
BUCKLING OF THE TILT CYLINDERS MAY OCCUR WHILE LOWERING THE VEHICLES CAB DUE TO IMPROPER USE OF THE CAB TILT SYSTEM.
Remedy: REPLACE THE 1 1/2 IN. DIAMETER TILT CYLINDERS ON ALL 104 IN. CABS WITH 2 IN. DIAMETER CYLINDERS.
680 vehicles affected
STRUCTURE:BODY
THE HANDHOLD MOUNTING SYSTEM, WHICH CONSISTS OF A TUBULAR HANDLE HELD IN THREE PLACES BY CAST ALUMINUM BRACKETS AND ATTACHED TO THE ENGINE EXHAUST MUFFLER HEAT SHIELD. VIBRATION FROM THIS SYSTEM CAUSES THE HANDHOLD PARTS TO WEAR. CONSEQUENCE OF DEFECT: IF THE PARTS WEAR THIN THE POSSIBILITY EXISTS THAT THE HANDHOLD MIGHT GIVE WAY UNDER THE WEIGHT OF A DRIVER. THIS COULD RESULT IN PERSONAL INJURY.
Remedy: REPLACE THE END BRACKETS WITH A MODIFIED DESIGN UTILIZING A RUBBER ISOLATER. ALSO, ADD A PLASTIC SLEEVE TO THE CENTER BRACKET FOR ISOLATION.
6,800 vehicles affected