Aftermarket July/August 2022 Issue

JULY/AUGUST 2022 AFTERMARKET 41 www.aftermarketonline.net hydraulic system or any broken parts. Any defective parts should be replaced. Attention must be made to remove the brake fluid reservoir cap prior to carrying out brake pad /disc replacement. When dismantled, it’s imperative to remove any rust or residue from the contact surfaces and caliper bracket. Build-up of dirt and rust, for example, can cause brake judder. “When the rust has been removed, they should use a brake cleaner to clean the surface and check the cleaned hub with a measuring stand for any possible lateral run-out deviations. It is advised to take care not to damage the guide shafts of the caliper bracket when undertaking the cleaning process. “Grease the new pads with a non-conductive, heat- resistant and solids-free agent such as Mintex Ceratec Advanced Lubricant. The technician is advised to not use copper paste on the surface of the brake, as it can affect the vehicle’s ABS system. Moving onto fitting the new brake disc and moving the brake piston, Scott said: “Fit the new brake disc onto the wheel hub and secure the newly fitted disc with the wheel studs and conical washers, using a DTI gauge to check for lateral run-out. A lateral run out of 0.07mm below the maximum radius is recommended. The brake piston must be moved back using the correct adjusting tools at the start of any brake replacement job and attention should be paid to any brake fluid that may spill out of the brake fluid reservoir while moving the piston back. It is also important to be sure to pay attention to the different versions of the caliper, the brake systems, as well as manufacturer-specific requirements and special tools.” All the tools used in the job can be found in the Mintex Tools Catalogue: https://mintex.com/tools/?lang=en- gbr Brembo: Two-piece disc replacement One of Brembo’s solutions for sustainability is the two- piece brake disc range containing floating, riveted and co- cast options, which weigh less than a one-piece brake disc. Siti Abdullah, Brembo UK & Ireland Key Account Manager observed: “There are some crucial points to take note when handling and fitting these discs. “Due to the decreased thickness of the disc hat, do not pick up or handle these brake discs by the steel hat as this might cause minute distortions and lead to excessive lateral runout and the onset of brake judder. Also, do not turn the steering wheel by holding the disc/caliper. This will lead to distortion to the reduced thickness, lightweight steel hat. When refitting the wheel, follow the correct torque sequence as well as the manufacturer’s recommended tightening torque. Tighten the wheel screws in three steps, first position by hand, second initial torque of 75Nm. Third, apply final torque, referring to the manufacturer’s instructions.” Siti added: “An increase in noise, vibrations or harshness could be the outcome of not following the above fitting guidelines, or replacing these discs with integral discs.” MEYLE: Brake pad installation guide Meanwhile, MEYLE says you can follow these four easy steps for a quick brake pad installation: 1: Removing the brake pads. Make sure that you always change brake pads and discs together. Then start with unbolting the caliper and removing it. Ensure no tension load is applied on the brake hose and uninstall worn brake pads. 2: De-rusting mounting and guide surfaces. Thoroughly remove surface rust from brake pad mounting face. Depending on brake design, also de-rust and clean the caliper bracket guide surfaces using an appropriate brush. Make sure to not damage the caliper bracket. Also check the brake caliper, anchor plate, tightening screws, guide plates and other small system parts for rust or damage and replace them if necessary. Also, do not use compressed air to clean the brakes, as this will stir up fine dust, which, when inhaled, is a serious health hazard. 3: Retracting the brake piston. Have the electric parking brake and pull-away assistant replaced by an expert using suitable electronic tooling to ensure proper functioning and prevent damage. Prior to proceeding, you should check the brake fluid level and drain some fluid, if necessary. Wind back the brake piston, using a suitable retraction tool, and always adhere to manufacturer's specifications. 4: Installing new brake pads. Lubricate mounting surfaces as well as guide and contact surfaces on the caliper bracket and the brake pad, using high-temperature- resistant, metal-free for-life grease. Keep the brake pad friction surfaces free of grease Mount the new brake pads and ensure they move freely. Eventually, reinstall the caliper. For MEYLE’s guide to brake disc- and pad-installation, go to: www.meyle.com/fileadmin/user_upload/service /downloads/poster/Poster_Disc-Brake-Fitting- Instructions_en.pdf Left: Braking parts from Comline Right: MEYLE says you should always change brake pads and discs together