LBT-521 Overhead Valve Adjustment

Description

Overhead Valve Adjustments is an advanced maintenance training course designed for diesel technicians, fleet maintenance professionals, and service personnel who want to develop the skills necessary to properly inspect, adjust, and maintain valve train systems on modern heavy-duty diesel engines. This course combines valve lash theory with practical service procedures used to perform overhead adjustments, engine brake adjustments, and valve train inspections on some of the industry’s most common engine platforms.

Students learn how valve lash affects engine performance, fuel economy, combustion efficiency, and component durability. Through step-by-step procedures, technicians will perform overhead adjustments on the Cummins X15, Detroit DD16, and PACCAR MX-13 while learning manufacturer-specific specifications, timing procedures, adjustment sequences, and torque requirements. Participants will also learn how to identify common valve train issues, inspect engine brake components, verify cam timing, and recognize symptoms associated with improper valve adjustments and related mechanical faults.

Topics Covered:

• Valve lash fundamentals and valve train operation
• Overhead valve adjustment procedures for Cummins, Detroit, and PACCAR engines
• Engine positioning, firing order application, and top dead center verification
• Engine brake adjustment, timing verification, and valve train inspection
• Maintenance intervals, torque specifications, and adjustment best practices

Objectives:

• Explain the purpose of valve lash and its effect on engine operation
• Perform overhead valve and engine brake adjustments using manufacturer-recommended procedures
• Apply proper timing, firing order, and adjustment sequences
• Inspect valve train components and identify common wear or performance concerns
• Apply maintenance practices that support engine performance, fuel efficiency, and reliability

Runtime = 77 minutes
Credit Hours = 1.50