How to fix Hydraulic disc brakes front/rear Tektro Auriga HD-E500

Fixing the Tektro Auriga HD-E500 hydraulic disc brakes involves several steps depending on the specific issue you're facing. Common problems include brake noise, poor braking performance, or fluid leaks. Here’s a general guide to troubleshoot and fix these issues:

1. Check Brake Pads for Wear

• Problem: If the pads are too worn, they won't engage properly with the rotor, leading to reduced braking power.
• Fix:
• Remove the wheel to access the brake pads.
• Check the thickness of the pads; if they're worn down below 1-2mm, replace them with new ones.
• To replace, remove the pin or bolt holding the pads in place, slide out the old pads, and insert new ones.

2. Check for Brake Pad Contamination

• Problem: If your pads are contaminated (due to oil, dirt, or moisture), braking performance will be significantly reduced.
• Fix:
• If oil or grease is on the pads, you can clean them using rubbing alcohol and a clean cloth.
• If the pads are too contaminated, they may need to be replaced.

3. Bleed the Brakes (If the Lever Feels Spongy)

• Problem: A spongy lever or weak braking can indicate air in the brake lines or low brake fluid.
• Fix:
• Tools Needed: Tektro brake bleed kit, syringes, brake fluid (Mineral Oil for Tektro brakes).
• Remove the wheel and the brake pads (optional, to avoid contamination).
• Attach the syringe to the brake caliper (remove the bleed screw) and the other syringe to the brake lever's bleed port.
• Slowly push fluid from the caliper to the lever to expel air bubbles from the brake line.
• Keep an eye on the fluid level in the syringes and ensure the fluid doesn’t overflow.
• Once fluid flows clean and free of bubbles, remove the syringes, replace the bleed screws, and reassemble the brake components.
• Test the brake lever feel to ensure it's firm and responsive.

4. Align the Brake Calipers

• Problem: If the calipers aren’t aligned properly, you might hear rubbing noise or feel inconsistent braking.
• Fix:
• Loosen the bolts holding the brake caliper in place (without fully removing them).
• Squeeze the brake lever hard to center the caliper on the rotor. Hold the lever and tighten the caliper bolts.
• Rotate the wheel to make sure the rotor spins freely without rubbing the pads.

5. Check for Rotor Warping

• Problem: A warped rotor can cause inconsistent braking, especially if it's rubbing against the brake pads.
• Fix:
• Spin the wheel and check if the rotor wobbles visibly.
• If it's slightly warped, you can use a rotor truing tool to gently bend it back into shape by carefully tweaking the rotor in the right direction.
• If the rotor is severely warped, it’s best to replace it.

6. Inspect Hydraulic Hoses for Leaks

• Problem: A leak in the hydraulic lines can cause brake failure or reduced braking power.
• Fix:
• Visually inspect the hydraulic lines for cracks, cuts, or leaks.
• If you find a leak, you may need to replace the damaged hose section or the entire hose.
• If the leak is at the hose-to-caliper or hose-to-lever connection, try tightening the fittings. If the leak persists, replacement is necessary.

7. Replace the Brake Lever or Master Cylinder (If Damaged)

• Problem: If the brake lever or master cylinder is damaged, the hydraulic system may not function correctly.
• Fix:
• If there's no brake fluid reaching the caliper or the lever feels completely unresponsive, it may be time to replace the lever or master cylinder. This is a more complex fix that might require professional help if you're not comfortable doing it yourself.

8. Hydraulic Lever Position

• Problem: the adjustment set screw may back out resulting in a potential loss of braking power.

           Fix: Hydraulic lever position - set screw adjustment – VoltBike

Links:

https://voltbike.com/products/disc-brake-pads

https://voltbike.com/products/disk-brake-rotor-180mm