Technician A says new drums may be protected by a coating that must be thoroughly cleaned off the friction surfaces before installing the drums. Technician B says refinished drums contain metal particles that must be removed before installing the drums. Who is correct?

Question

Quizplus · Accepted Answer

Both technicians are correct. New drums may be protected by a coating that should be cleaned before installation to prevent reduced braking performance. Refinished drums may contain metal particles from the resurfacing process that can cause uneven wear, so it's essential to remove any debris before installing them.

Technician a Says New Drums May Be Protected by a Coating