How to repair brake XCMG BACKHOE LOADER

Repairing the brakes on an XCMG Backhoe Loader requires a proper inspection and step-by-step troubleshooting. Here’s a detailed guide to help you diagnose and repair brake issues:

1. Identify the Brake System Type
Most XCMG backhoe loaders use a hydraulic wet disc brake system or a dry drum brake system. Identify which type is in your machine before proceeding.

2. Common Brake Issues & Solutions
A. Spongy or Weak Brakes (Low Brake Pressure)
Cause: Low brake fluid, air in the system, or a worn master cylinder.
Solution:
Check Brake Fluid – Locate the brake fluid reservoir and ensure the fluid is at the proper level.
Bleed the Brakes – Remove air from the system by bleeding the brake lines.
Inspect the Master Cylinder – If leaking or weak, replace or rebuild it.
B. Hard Brake Pedal (Brake Not Releasing)
Cause: Clogged brake lines, faulty brake valve, or worn-out seals.
Solution:
Check Brake Lines – Look for blockages, leaks, or damage.
Inspect the Brake Valve – If stuck, disassemble and clean or replace.
Check Return Springs – Replace if broken or weak.
C. Brakes Overheating or Not Engaging Properly
Cause: Worn-out brake discs or contamination in the system.
Solution:
Inspect Brake Discs & Pads – Replace if excessively worn.
Flush the Brake System – Remove old, contaminated brake fluid and replace with fresh hydraulic brake fluid.
D. Brake Oil Leak
Cause: Worn-out seals in the brake master cylinder, calipers, or wheel cylinders.
Solution:
Identify the leak source (caliper, cylinder, or hose).
Replace damaged seals or components.
Refill and bleed the system.
3. Step-by-Step Brake Repair Process
Step 1: Safety First
Park the machine on level ground and engage the parking brake.
Turn off the engine and release hydraulic pressure.
Block the wheels for safety.
Step 2: Inspect Brake Components
Remove the rear wheel to access the brake assembly.
Inspect the brake pads, discs (for wet brakes), or drums (for dry brakes).
Look for leaks or cracks in the hydraulic system.
Step 3: Bleed the Brake System (Remove Air)
Locate the bleeder valve on the brake caliper or master cylinder.
Fill the brake reservoir with fresh DOT 3 or DOT 4 hydraulic fluid.
Pump the brake pedal slowly and open the bleeder valve until fluid flows without air bubbles.
Repeat for all wheels.
Step 4: Replace or Adjust Brake Pads/Discs
If worn, remove the brake caliper (for disc brakes) or brake drum (for drum brakes).
Replace the brake pads or shoes if below the minimum thickness.
If using wet brakes, ensure the hydraulic system is flushed and refilled with fresh oil.
Step 5: Test the Brakes
After repair, start the engine and pump the brakes.
Drive slowly and test braking efficiency.
Ensure there are no unusual noises or leakages.
4. Preventive Maintenance
Check brake fluid levels regularly.
Inspect hydraulic hoses and connections for leaks.
Flush and replace brake fluid periodically (as per the manufacturer’s recommendation).
Lubricate moving brake components to prevent sticking.