Mazda CX-9 Grand Touring 2009 Manual page 540

2008 Mazda CX-9 Grand Touring
2008 BRAKES Conventional Brake System - Mazda CX-9
Repeated panic braking may raise the temperature in some portions of disc plate by approx. 1,000 °C {1,832 °
F}. This results in deformed disc plate.
Due to corrosion, the thickness and friction coefficient of disc plate change.
If a vehicle is parked under damp conditions for a long time, corrosion occurs on the friction surface of disc
plate.
The thickness of corrosion is uneven and sometimes appears like a wave pattern, which changes the friction
coefficient and causes a reaction force.
Inspection and repair procedure
Fig. 30: Inspection & Repair Procedure Diagram
Courtesy of MAZDA MOTORS CORP.
Lateral runout inspection
1. To secure the disc plate and the hub, tighten the hub nuts upside down or insert a washer (thickness 10
mm {0.39 in} with an inner diameter more than 12 mm {0.47 in}) between the hub bolt and the hub nut.