What is the labor time to install the bull gear and air comp. on a 2001 freightliner Columbia 60 series Detroit?

The labor time to install the bull gear and air compressor on a 2001 Freightliner Columbia with a Detroit 60 Series engine typically ranges from 6 to 10 hours, depending on the technician's experience and the specific conditions of the vehicle. Factors such as accessibility, existing wear or damage, and additional repairs needed can also affect the total time required. Always consult a service manual or professional for the most accurate estimates.