How to Replace the Front Hydraulic Brake for Q7/E300

As an electric bike is used for cycling, many mechanical components are consumables. The frequency of replacement depends on your riding habits and regular maintenance. Among them, the brakes are one of the components most affected by riding habits. Therefore, I highly recommend that you understand the process of replacing brakes, as it will be helpful to you. This blog post demonstrates the steps to replace the front hydraulic brake, which applies to most electric bikes equipped with hydraulic brakes.

Tools needed: Multi-function hex wrench

Step 1: Remove the battery.

Step 2: Disconnect the left and right brake cables.

Step 3: Remove the grip. (Please note the model of your brake lever. For some models, you can directly remove the brake lever after loosening the screw without removing the grip.)

Step 4: Remove the left front brake screw.

Step 5: Remove the screw securing the left front fork brake cable.

Step 6: Remove the screws on the top and bottom of the front brake caliper.

Step 7: Install the new front brake lever and connect the cables.

Step 8: Install the grip.

Step 9: Secure the left front fork brake cable with the fixing screw.

Step 10: Install the new front brake caliper.

Step 11: Squeeze the left front brake lever tightly and tighten the screws on the top and bottom of the brake caliper. Release the brake lever to ensure that the brake rotor is centered between the brake caliper pads.

Step 12: Rotate the tire to ensure that the brake rotor does not directly touch the brake caliper.

Note:

If you hear any abnormal noise while rotating the tire or if there is friction between the rotor and the brake caliper, please watch our video on our YouTube channel for adjusting the rotor and caliper position.