2019 Peterbilt 520 technical service bulletins
44 technical service bulletins and manufacturer communications cover the 2019 Peterbilt 520, including one warranty extension.
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- 7/700 Service Agreement
- This optional software update is expected to be available after 10/30/2026 for chassis equipped with EMY...
- An upgraded power steering pump is available for certain Model 520 chassis with a RHSU or dual steering...
- Kenworth: Dealers should check the chassis list and SIR weekly for VIN changes
- EPA17-24 mx
- 4/29/2025
- Info Only Unnecessary starter replacements can result from customer complaints regarding engine starting...
- Fix As Fail The height control valve (HCV) rod on vehicles with low air leaf suspensions is prone to...
- Quality and Volume Validation vehicles built for the 520 VMUX program between July 2019 and December 2020...
- Certain Engine Model Year 2018 PACCAR MX-11 engines must have the crankcase pressure sensor replaced due...
- Info Only
- The service information for Bendix Air Dryer maintenance is being updated to include new procedures.
- Info Only – Certain 520 model chassis built between 2014 and 2021, and equipped with the Red Dot HVAC...
- Due to major data carriers phasing out 3G networks, chassis currently utilizing first generation Peoplenet...
- Safety Recall – Certain Model 520 trucks may have been built without a quick release (QR) valve
- Fix-As-Fail – Due to undersupply issues, only a limited supply of Diesel Exhaust Fluid (DEF) sensors are...
- Safety Recall â Cummins Fuel Rail Leak â the federal safety agency ID: 21V391 / TC: 2021-323, Cummins...
- Fix-As-Fail – PX9 oil pan may leak due to improper hardware
- The current chassis harness connector contains a wire that is no longer necessary with the latest...
- Information Only – Windshield washer pumps have a high No Trouble Found rate
- Safety Recall: Interim Dealer Notification
- Fix as Fail: Peterbilt has introduced an improved mounting bracket for low mount air tanks for vehicles...
- Power train
- Fix-As-Fail
- Electrical system
- Fix as Fail: For all conventional models, except 387/587, equipped with Side-of-Cab (“SOC”) exhaust and...
- Information Only:
- Information only: Hendrickson Softek front axle maintenance intervals and requirements.
- DEF tank covers may become loose and potentially crack on vehicles built before October 2019 with DEF tank...
- Service brakes, air: supply: quick release valve
- Information Only: Proper jump-starting voltage will eliminate high voltage related issues and equipment...
- Safety Related Campaign
- Information Only
- Information only: Some model 320 and 520 vehicles built before 3/11/2019 may experience loss or loosening...
- Information Only:
- Information Only â
- Fix-As-Fail -Â Composite fittings used in the cooling system may crack, resulting in coolant leaks
- Fix-As-Fail: Two separate causes have been identified as root
- Safety Recall: Vehicles fail to confirm with FMVSS/CMVSS No 108 Table 1-a requirements which requires 2...
- Non-Safety Campaign: Identified Model 520 vehicles, equipped with natural gas engine, were built with a...
- Information Only
- Safety Recall: INTERIM NOTIFICATION
- Information Only: Proper instructions for closure of power distribution box cover to prevent corrosion.
- Non Safety Campaign: Vehicles were built with a 5 bolt supply wire for the air dryer pressure sensor that...
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