A telehandler operator observes that only one of the two front outriggers fully extends, while the other stops halfway. The hydraulic fluid level is full, and there are no visible leaks. What is the most probable cause?

Question: A telehandler operator observes that only one of the two front outriggers fully extends, while the other stops halfway. The hydraulic fluid level is full, and there are no visible leaks. What is the most probable cause?

Answer options:

• A faulty main control valve spool for the outrigger circuit. ✅ Air trapped in the hydraulic cylinder of the partially extended outrigger.
• A bent outrigger leg causing mechanical binding.
• Incorrect tyre pressure on the side with the partially extended outrigger.

Correct answer: Air trapped in the hydraulic cylinder of the partially extended outrigger.

Explanation: If one cylinder extends partially while the other extends fully and there are no leaks, air trapped in the hydraulic cylinder of the partially extended outrigger is a common cause, as it creates a spongy resistance. A faulty control valve spool would likely affect both outriggers or prevent any movement. Mechanical binding or tyre pressure would not typically cause a partial, smooth hydraulic stop.