2021 Kenworth T440 TSBs
11 Technical Service Bulletins across 6 categories
Engine
3 bulletinsSAFETY RECALL Additional chassis have been included.
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The chassis list has been updated. Certain T370 / T440 / T470 / T480 / T660 / T680 / T800 / T880 / W900 / C500 chassis may be equipped with air tank reservoirs that have less than twelve times the combined volume of all service brake chambers which fail to conform to Federal Motor Vehicle Safety Standard (FMVSS) No.121, Air Brake Systems.
Info Only - PACCAR is introducing Over-the-Air (OTA) software updates for engine MY17 and newer chassis equipped with...
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Cummins X15, X12, ISX12, ISX12N, L9N, PX-7, and PX-9 engines The technology will leverage the existing Remote Diagnostic cs hardware to deliver secure software updates remotely. This will reduce downtime and save on maintenance costs for eligible vehicles.
Information Only: Due to differences between the PACCAR MX-11 or MX-13 2021A and 2021B engines, technicians must be able...
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to identify which of these engines are in a chassis.
Electrical
3 bulletinsFix-As-Fail Due to undersupply issues, only a limited supply of Diesel Exhaust Fluid (DEF) sensors are available.
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As a temporary solution, after PACCAR confirms a DEF sensor is not available, a temporary software update will allow a vehicle to continue operation with a failed DEF sensor by disabling the DEF sensor diagnostics.
Safety Recall - Model year 2021 Cummins PX9 fuel hose assemblies may leak from the hoses between the fuel pump and the remote filter head.
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A fuel leak in the presence of an ignition source may increase the risk of a fire. A repair is now available.
Safety Recall Cummins Fuel Rail Leak NHTSA ID: 21V391 / TC: 2021-323, Cummins Recall: C2423.Cummins PX9 and ISX12 fuel...
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rails may leak around a sealing washer, potentially resulting in fuel leaks.Undetected prolonged diesel fuel spray in the presence of an ignition source may increase the risk of fire.
Body & Paint
2 bulletinsNon-Safety Campaign - Convex mirrors are available.
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Parts will be shipped to dealers.
Information Only - Rear axle Quarter Fenders with less than two inches of clearance between the top of the quarter...
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fender and the bottom of the trailer/equipment are susceptible to damage. The lack of clearance could result in cracked/broken quarter fenders or complete separation if undetected or un-remedied.
Other
1 bulletin"Kenworth: Dealers should check the chassis list and SIR weekly for VIN changes.
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2 chassis added to the chassis list. Peterbilt: Dealers should check the chassis list and SIR weekly for VIN changes. 10 chassis added to the chassis list."
Steering
1 bulletinSafety Recall Interim Notification - The Dana D-Series front axle steer arm fasteners that attach the steer arm to the...
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steering knuckle may fail, increasing the risk of a crash or injury. Repair information will be added when a repair procedure and parts are available.
Fuel System
1 bulletinDue to major data carriers phasing out 3G networks, chassis currently utilizing first generation Peoplenet Mobile...
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Gateway (PMG001) will experience severe 3G service degradation as early as January of 2022. Chassis currently utilizing 3G antennas as a primary antenna may experience this degradation