Title: Check the condition and operation of the hand brake (trailer) control valve, if applicable.
Course: Diesel Equipment Technology I (20107-I) > Section: Preventive Maintenance and Inspection: Servicing Air Brakes

Checking should include inspecting and testing, based on

- manufacturer guidelines
- the description of normal operation.

ASE 1: III. Brakes: B. Air Brakes: Air Supply and Service System (P-1)

Process/Skill Questions:

- What may occur when the hand brake (trailer) control valve does not operate according to manufacturer specifications?
- What will happen if the control valve leaks air into the braking system?