When bleeding a hydraulic brake system on a compact excavator after component replacement, what is the correct sequence typically followed to ensure all air is removed?

Question: When bleeding a hydraulic brake system on a compact excavator after component replacement, what is the correct sequence typically followed to ensure all air is removed?

Answer options:

• Master cylinder, then furthest wheel from master cylinder, then closest wheel.
• Closest wheel to master cylinder, then furthest wheel. ✅ Furthest wheel from master cylinder, then progressively closer wheels.
• Any order, as long as each wheel is bled thoroughly.

Correct answer: Furthest wheel from master cylinder, then progressively closer wheels.

Explanation: To effectively remove all air from a hydraulic brake system, the bleeding process should always start at the brake caliper or wheel cylinder furthest from the master cylinder and then proceed to the progressively closer wheels. This ensures that air is pushed out of the longest lines first and minimizes the chance of air becoming trapped. The master cylinder is typically bled first if it was removed or extensively disassembled, but the wheel bleeding order is crucial for the rest of the system.