Safeline Technical Tips - Enhance Your Brake Knowledge


  • Pedal pressure applied is transferred through brake fluid via master cylinder/booster through steel pipework towards the brake calipers.
  • Pistons located in the calipers push against the brake pad resulting in the pad pressing against the disc.
  • As the brake pads wear it is normal for the brake fluid level in the reservoir to decrease.
  • It is not necessary to top up brake fluid unless the level falls below the minimum level mark on the reservoir.
  • If brake fluid level drops significantly, it is an indication of excessive pad wear or there is a leak in the hydraulic system.
  • If necessary, top up brake fluid only once new pads have been fitted.

Technical Tips


  • Clear (fluid in good condition).
  • Muddy brown or black (old or dirty fluid).
  • Recommended replacement interval every 2 years or refer to car manufacturer recommendation.
  • It is NORMAL for the brake fluid level to drop as the pad wears.
  • It is NOT RECOMMENDED that brake fluid is topped up BEFORE fitting new pads – this can cause a spill when caliper piston is pushed back when new pads are fitted.

Safeline Technical Tips


  • The tool required to measure the disc is a micrometre.
  • Measure the thickness of the disc at different points around the circumference of the disc face.
  • Minimum disc thickness is normally marked or engraved on the disc. If disc thickness is less than the recommended thickness, replace discs.
  • Training on the correct use of a micrometre is recommended.

Safeline Technical Tips

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