With vehicle braking systems having to cope with the stress of the winter months it is important to check brake callipers at this time of year. ADE brake caliper supplier, Brake Engineering offers some advice;

A visual inspection of the mechanical and hydraulic parts is the first step, looking for in particular leaking, cracking and wear of all associated parts.

Having completed the visual checks, the technician should check the physical operation of the caliper, in particular, the free sliding action of the guide bolts in the carrier. The piston should push its pad into contact with the disc, and the carrier should pull the other pad into contact.

If this fails to happen, and there are any signs of corrosion or damage, dismantle the caliper and remove the pads. Take the carrier, and clean using brake cleaner and a wire brush. Pay particular attention to the guide pins, and guide pin bores and make sure not to damage the rubber components.

Under no circumstances must any attempt be made to “re-work” the carrier, i.e. using a file to “clean out” corrosion. Any work of this nature can lead to excessive clearances to the pad abutments, which will result in clanking and rattling noises on braking. If necessary fit new guide pins and dust covers.