2008 Peterbilt 335

SUSPENSION

ON SOME PETERBILT TRUCKS, CERTAIN PARTS USED IN THE AIR SUSPENSIONS HAVE A HIGH COPPER CONTENT CAUSING PREMATURE FAILURE.

PARKING BRAKE

CERTAIN TRUCKS EQUIPPED WITH BENDIX SR-7 SPRING BRAKE MODULATING VALVES. THE INTERNAL RUBBER CHECK VALVE MAY LEAK CAUSING A DELAY IN THE APPLICATION OF THE SPRING BRAKES TO PARK THE VEHICLE AFTER THE OPERATOR PULLS THE DASH VALVE BUTTON.

STEERING:LINKAGES:TIE ROD ASSEMBLY

ON CERTAIN MEDIUM DUTY VEHICLES, THE RIGHT SIDE STABILIZING ROD, WHICH SPANS THE COOLING MODULE AND THE RIGHT FRAME RAIL BRACKET, WAS INADVERTENTLY DESIGNED TOO CLOSE IN PROXIMITY TO THE ALTERNATOR POSITIVE ELECTRICAL TERMINAL POST. IN THE EVENT THE PROTECTIVE RUBBER BOOT ON THE TERMINAL POST WAS REMOVED OR CRACKED AND THE ENGINE MOUNTS ALLOWED THE ENGINE TO ROCK, ELECTRICAL ARCING COULD OCCUR BETWEEN THE RADIATOR TIE ROD HARDWARE ON THE FRAME SIDE AND THE ALTERNATOR TERMINAL POST WHILE THE ENGINE IS RUNNING.

SERVICE BRAKES, AIR:SUPPLY:HOSES, LINES/PIPING, AND FITTINGS

CERTAIN TRUCKS EQUIPPED WITH EATON SYNFLEX ECLIPSE BRAND EXTRUDED NYLON AIR BRAKE HOSE TUBING FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 106, "BRAKE HOSES." THE TUBING WAS MANUFACTURED WITH ONLY FOUR LAYERS OF NYLON MATERIAL, INSTEAD OF THE SPECIFIED FIVE LAYERS.

ENGINE AND ENGINE COOLING:ENGINE:DIESEL

PACCAR IS RECALLING MODEL YEAR 2008-2010 KENWORTH T300, T270, AND T370, MODEL YEAR 2009-2010 T800 AND PETERBILT MODEL YEAR 2008-2010 335, 340, AND 367 VEHICLES BUILT ON CUMMINS' DIESEL ENGINE. THE VEHICLES MAY BE DESIGNED WITH A HARD WIRED, DASH-MOUNTED SWITCH THAT ENABLES THE VEHICLE OPERATOR TO INHIBIT AFTERTREATMENT DIESEL PARTICULATE FILTER REGENERATION IN ENVIRONMENTS WHERE THE OPERATOR BELIEVES IT MAY BE UNSAFE FOR ELEVATED EXHAUST TEMPERATURES. DUE TO AN ISSUE WITH THE LOGIC IN THE ECM SOFTWARE IN THESE ENGINES, THE SWITCH MAY NOT FUNCTION CORRECTLY, LEADING THE OPERATOR TO BELIEVE THAT THE SWITCH IS IN "INHIBIT" MODE WHEN IT IS NOT.