GAFLE

The goal of brake bleeding is to remove trapped air inside the hydraulic brake circuit. Air is compressible, and air bubbles will create a soft, spongy brake pedal, extended braking distance and inconsistent brake response. Even high-quality Gafle brake fluid cannot deliver full performance if bleeding work is done incorrectly.

Many technicians bleed wheels in the wrong order. The standard principle is to start bleeding from the wheel farthest away from the master cylinder, then move to the closest one. If you skip this order, air may get pushed back into sections that have already been bled. For vehicles with ABS, the standard four-wheel bleeding is not enough. The ABS hydraulic unit also holds air, and you need to activate the ABS pump to purge trapped air inside the modulator.

If the reservoir runs empty, new air will be sucked into the whole brake system. This means you have to restart the entire bleeding process from scratch. Technicians must keep checking the reservoir level and top up fresh brake fluid constantly throughout the bleeding work. Never allow the fluid level to drop below the minimum mark during operation.

When performing a brake flush and bleeding, the technician should fully expel all old fluid before adding new brake fluid. If residual old fluid with different additive packages remains inside the system, mixing may affect long-term stability. Also, you cannot bleed glycol brake fluid into a system previously filled with silicone DOT5 brake fluid. The incompatibility will damage rubber seals and lead to brake failure.

After finishing bleeding and confirming a firm brake pedal, you need to do a pressure test. Press the brake pedal firmly and hold it for 30 seconds. If the pedal slowly sinks, there may still be hidden leaks or residual air. Inspect all hoses, calipers and pipe joints for wet brake fluid stains.

Gafle provides step-by-step brake bleeding technical guides for our wholesale partners. Our brake fluid products are ideal for brake flush and bleeding service. Contact our sales team if you need technical documents to train your mechanics.