2026 Mack Pinnacle (pi/PN) TSBs
14 Technical Service Bulletins across 7 categories
Engine
4 bulletinsParker engine-mounted hydraulic pump service bulletin.
Mack Trucks Equipped With A Cummins Engine - Engine Preheat Icon Does Not Illuminate In The Instrument Cluster (IC)...
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During Engine Pre-heat (Intake Air Heater) Operation - Vehicles With 2018Instrument Cluster Update, Model Year2018 And Newer
Vehicles affected by this issue will show coolant runoff on the front rights side of the engine.
CBR - 13 Liter Engines ONLY - Engine Coolant Pump Housing Leak; Coolant Found Around The Oil Cooler Duct Cover Or In...
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Between The Coolant Pump Housing And Oil Cooler Housing.
Other
4 bulletinsThe purpose of this CBR is to provide steps on how to correct a customer complaint of DTC P107B86 accompanied With...
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intermittent loss of throttle.
CBR - Mack Chassis - Through Shaft Bearing Retainer Breakage On Mack Carriers.
CBR - Mack Carrier Nut Adhesive Change.
CBR - No Start Condition After Over the Air Programing.
Electrical
2 bulletinsCBR - Mack Temperature Sensor Troubleshooting Guide
CBR - When an OTA (Over-The-Air) job starts to program the VECU blocks the starter relay out, if the job ends in a...
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Critical failure, the vehicle will remain in Safe State.
Suspension
1 bulletinCBR - Z Spring Bracket Wear.
Pre-Delivery & Maintenance
1 bulletinCBR - Wiper Linkage Inspection.
Steering
1 bulletinThe vehicles steering shaft support bracket may have been assembled with incorrect hardware.
Lighting
1 bulletinMack Trucks has identified that certain truck models may have been assembled with incorrect center bearing mounting...
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hardware and could have been torqued incorrectly. Improper torque can increase the risk of hardware failure. To address this issue, please follow the instructions in this document to replace and correctly torque the center bearing and center bearing mounting bracket hardware.