Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
32-025
Service Bulletin/Repair Instructions
Info Only Unnecessary starter replacements can result from customer complaints regarding engine starting issues. A new Starter Troubleshooting Guide has been created to provide a comprehensive list of starting system checks, which should reduce unnecessary starter replacements and associated warranty claims. Engine starting system warranty claims now require a completed Starter Checklist, a Battery Pack Midtronics Report, and a Cable Drop Midtronics Report. Claims filed without these documents may be denied.
16-044
Service Bulletin/Repair Instructions
Fix As Fail The height control valve (HCV) rod on vehicles with low air leaf suspensions is prone to toggling over center during rough road conditions. With full suspension articulation, HCV bracket flexes and toggles over center the HCV linkage, which results in either deflated airbags or makes them unable to inflate. Fix-as-fail start date is 07/30/2024.
32-019
Service Bulletin/Repair Instructions
Fix As Fail â Chassis that were manufactured with certain battery cable routing brackets may experience rubbing or chafing of the battery cables.
45-064
Service Bulletin/Repair Instructions
Info Only - PACCAR is introducing Over-the-Air (OTA) software updates for engine MY17 and newer chassis equipped with 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.
14-043
Service Bulletin/Repair Instructions
Fix-As-Fail On certain chassis with Low Air Leaf Suspension or Low-Low Air Leaf Suspension, the Height Control Valve (HCV) arm may be rubbing on other components when the bend in the arm is facing outboard. Flipping the bend in the HCV arm inboard prevents the rub.
13-060
Service Bulletin/Repair Instructions
The service information for Bendix Air Dryer maintenance is being updated to include new procedures.
13-057
Service Bulletin/Repair Instructions
Fix-As-Fail â A hill start assist (HSA) valve plumbing revision eliminates ice buildup in the HSA valve exhaust in cold weather.Â
51-013
Service Bulletin/Repair Instructions
Due to major data carriers phasing out 3G networks, chassis currently utilizing first generation Peoplenet Mobile 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.
44-036
Service Bulletin/Repair Instructions
Information Only: âÂÂAn improved procedure has been developed for servicing the fuel filter on model 348 chassis equipped with a PX-9 and 11 5/8â frame rails.
43-071
Service Bulletin/Repair Instructions
Fix-As-Fail â Due to undersupply issues, only a limited supply of Diesel Exhaust Fluid (DEF) sensors are available. 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.
02-168
Service Bulletin/Repair Instructions
Information Only - Rear axle Quarter Fenders with less than two inches of clearance between the top of the quarter 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. â
52-004
Service Bulletin/Repair Instructions
Fix-as-Fail: Radio does not mute when truck with auto trans is placed in reverse. Software flash resolves issue.
21PBE
Service Bulletin/Repair Instructions
âSafety Recall â TSE Brake Chamber Air Leak â NHTSA ID: 21V328. Meritor brake chambers were built with a misaligned park spring, which may cause a fatigue hole in the diaphragm and an internal air leak. The affected brake chambers will be replaced.
21-PBD
Service Bulletin/Repair Instructions
Safety Recall â Cummins Fuel Rail Leak â NHTSA ID: 21V391 / TC: 2021-323, Cummins Recall: C2423. Cummins PX9 and ISX12 fuel 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.
02-160
Service Bulletin/Repair Instructions
Information Only â Windshield washer pumps have a high No Trouble Found rate. Washer pumps may fail to spray due to a clogged filter.
13-055
Service Bulletin/Repair Instructions
Fix as Fail: Peterbilt has introduced an improved mounting bracket for low mount air tanks for vehicles built between January 01, 2017 and July 06, 2020. Torsional vibration may stress the currently-installed brackets and cause them to fail near the bottom of the frame rail.
14-027
Service Bulletin/Repair Instructions
Information only: In 2020, Peterbilt and Kenworth began using the same M10, M12, M16, and M20 frame fasteners on all vehicles. Torque specifications for these fasteners are different from previous fasteners.
20PBE
Service Bulletin/Repair Instructions
Safety Recall: Peterbilt has decided that a condition could exist in certain model 348, 365, 367, 389, 520, and 567 vehicles built between 11/19/2019 and 4/09/2020. Vehicles equipped with Watson & Chalin SL2065 lift axles may have lower rear pivot bolts that are not long enough to sufficiently engage the locking feature of the corresponding nuts. In some cases, this condition may cause a loss of clamp load of the pivot joint (arm to axle). Extended use of the lift axle in this condition can result in foreign object debris on the roadway, increasing the risk of a crash and/or injury.
02-158
Service Bulletin/Repair Instructions
Fix as Fail: Peterbilt has determined that certain model 348, 365, 367, 382, 384, 386, 388, 389, 567, 579, and 587 trucks, built between 4/13/2010 and 3/16/2020 and equipped with a flush mounted battery box, utilized rubber washers that could rub through and cause the aluminum box mounting tabs to rub directly on the steel frame brackets. This could result in cracked battery box mounting angles. Resolution is to add the reinforcement bracket(s) to affected vehicles.
13-054
Service Bulletin/Repair Instructions
Fix-As-Fail - Bendix New-Gen Lightweight Steer Axle Drum Brake Spider Cracking
43-067
Service Bulletin/Repair Instructions
Fix as Fail: For all conventional models, except 387/587, equipped with Side-of-Cab (âSOCâ) exhaust and built from 03/6/2006 to 1/20/2020, the clamps that secure the SOC exhaust stacks may not be tightened properly. This may allow the exhaust stack to rotate and contact the cab or sleeper.
32-015
Service Bulletin/Repair Instructions
Information Only: This bulletin provides dealers with a battery warranty quick reference guide to ensure the appropriate tests for battery warranty are performed in order to prevent battery warranty claims filed with incorrect or incomplete information.
11-001
Service Bulletin/Repair Instructions
Information only: Hendrickson Softek front axle maintenance intervals and requirements.
32-016
Service Bulletin/Repair Instructions
Information Only: Proper jump-starting voltage will eliminate high voltage related issues and equipment damage.
19PBG
Service Bulletin/Repair Instructions
Safety Recall: Peterbilt Motors Company has determined that a defect, which relates to motor vehicle safety, may exist in certain model 348, 367, 389, 520 or 567 vehicles manufactured between November 22, 2019 and December 5, 2019. Output shafts may not have been correctly heat-treated and could break near the pinion nut. Resolution is to inspect the driveshaft to verify the julian date, and if witin th esupect date rate,, replace the output shaft.
03-071
Service Bulletin/Repair Instructions
Information Only - Vehicles built with NAMUX software from 2013 to present may experience accuracy issues with the tachometer. The issue can be temporarily resolved using any one of the included procedures.
01-075
Service Bulletin/Repair Instructions
Information Only: This bulletin provides guidance for repairing an air-conditioning system after internal failure of the A/C compressor.
TIB43-062
Service Bulletin/Repair Instructions
Information Only â This bulletin provides information about the California Air Resources Board (CARB) Periodic Smoke Inspection Program (PSIP) and Heavy Duty Vehicle Inspection Program (HDVIP).
19PBD
Service Bulletin/Repair Instructions
Safety Recall: Defectective lower hsaft to u-joint yoke in non-telescoping steering columns due to supplier weld not creating enough penetration and can crack, which could lead to a loss of steering and increase risk of crash or injury. Resolution is to inspect for defective identified manufacturing lot and replace steering column if determined defective.
42-056
Service Bulletin/Repair Instructions
Fix-As-Fail -ÃÂ Composite fittings used in the cooling system may crack, resulting in coolant leaks. Brass fittings are available to replace the composite fittings.
42-058
Service Bulletin/Repair Instructions
Fix-As-Fail: Two separate causes have been identified as root cause of intermittent low coolant indicator illumination.
34-066
Service Bulletin/Repair Instructions
Information Only - Quick Reference Guide for Electric harness damage repairs.
43-060
Service Bulletin/Repair Instructions
Non-Safety Campaign - Certain chassis equipped with certain Goodyear tires received a Greenhouse Gas (GHG) label that does not reference the correct tire emissions identifier related to new rolling resistance data.
116-1
Service Bulletin/Repair Instructions
SmartNav 2.0 Hardware retrofit for quality validation and vehicle validation units.