Peterbilt Model 389 Body Builder User Manual
![Peterbilt Model 389 Truck Body Builder manual cover](/images/fadedc10c19ae1daa37ba24c/thumbs/thumb175x175.webp)
The recommended maintenance intervals for the Peterbilt Model 389 include regular oil changes every 15,000 miles, tire rotations and brake inspections every 30,000 miles, and a comprehensive inspection every 50,000 miles.
To troubleshoot electrical issues in the Peterbilt Model 389, check the battery connections, inspect fuses and relays, and use a multimeter to test circuits for continuity.
To adjust the mirrors on the Peterbilt Model 389, position the in-cab control switch to the desired mirror, then use the switch to adjust the angle and orientation until optimal visibility is achieved.
To perform a DPF regeneration on the Peterbilt Model 389, initiate the parked regeneration process through the onboard display by following the prompts and ensuring the truck is parked in a safe, open area.
The recommended coolant for the Peterbilt Model 389 is an extended life coolant (ELC) with a 50/50 mix of antifreeze and distilled water to prevent corrosion and freezing.
To reset the service light on the Peterbilt Model 389, turn the ignition key to the "On" position without starting the engine, then press and hold the trip reset button until the service light turns off.
The recommended tire pressure for the Peterbilt Model 389 is typically between 100 to 110 PSI, but always refer to the tire manufacturer’s guidelines for specific pressure recommendations.
To replace the headlight bulb on the Peterbilt Model 389, remove the screws securing the headlight assembly, disconnect the electrical connector, replace the bulb, and reassemble the components.
To adjust the air suspension on the Peterbilt Model 389, use the in-cab controls to modify the ride height settings, ensuring the truck is on a level surface for accurate adjustments.
To improve fuel efficiency in the Peterbilt Model 389, maintain proper tire pressure, conduct regular maintenance checks, reduce idling time, and optimize driving habits by maintaining steady speeds.