Peterbilt Model 220 Operator’s Manual
![Peterbilt Model 220 Truck Operator’s manual cover](/images/d00960b1dbab9567763edbca/thumbs/thumb175x175.webp)
The recommended tire pressure for the Peterbilt Model 220 varies depending on the load and type of tires. Typically, it's between 95-105 psi for front tires and 85-95 psi for rear tires. Always refer to the manufacturer's guidelines for specific requirements.
Routine inspections should be performed daily before operation. A more thorough inspection, including checking fluid levels and brake system, should be conducted weekly.
To check the engine oil, park the truck on level ground, turn off the engine, and wait at least 10 minutes. Use the dipstick to check the oil level. To refill, remove the oil cap and add the recommended oil type until the level is within the safe range indicated on the dipstick.
First, check the fuse and relay for the AC system. Ensure that the refrigerant levels are adequate. Inspect the AC compressor for any visible damage or leaks. If the issue persists, consider seeking professional service.
If the check engine light comes on, check for any obvious issues such as low oil or coolant levels. Use a diagnostic scanner to retrieve the error code for specific issues. If you are unable to address the problem, consult a qualified mechanic.
Brakes should be adjusted by a professional to ensure safety. However, for manual slack adjusters, you can turn the adjusting bolt until the brake shoes make contact with the drum, then back off slightly to ensure free wheel rotation.
Regularly check the battery terminals for corrosion and clean if necessary. Ensure the battery is securely mounted. Test the battery charge level monthly and recharge or replace as needed.
To improve fuel efficiency, maintain proper tire inflation, reduce idling time, follow regular maintenance schedules, and avoid overloading. Use cruise control on highways when possible.
Check for fuel delivery issues such as clogged filters or low fuel levels. Inspect the air intake system for blockages. Verify that there are no active diagnostic codes indicating engine or transmission issues.
Locate the fuse box, typically found under the dashboard or in the engine compartment. Use the diagram on the fuse box cover to identify the blown fuse. Remove it with a fuse puller and replace it with a new fuse of the same rating.