Title: Inspect the pilot control valve linkages, cables, and power take-off (PTO) controls.
Course: Diesel Equipment Technology III (20107-III) > Section: Hydraulics: Servicing Control Valves

Inspection should include

- performing a visual and operational check of the pilot lines, linkage, and cables that operate the hydraulic control valves
- looking for binding, rust, and leakage of the actuating members
- adjusting, repairing, or replacing, as needed.

ASE 2: VIII. Hydraulics: E. Control Valves

Process/Skill Questions:

- Why have many hydraulic control systems removed linkages and cables and replaced them with electrical/electronic mechanisms?
- What effects do worn out linkages have on precise control?