2 Piece (Hat Type) rotor replacement guide
Fitting by a knowledgeable and qualified mechanic is always recommended.
1. ADB rotors are all machined and double milled for perfect parallelism BEFORE LEAVING THE FACTORY
2. AVOID WARPED ROTOR CLAIMS WHEN FITTING WHEELS:
a. DO NOT OVER TIGHTEN WHEEL NUTS WITH EXCESSIVE POWER TOOL TORQUE
b. DO NOT TIGHTEN WHEEL NUTS TO ANY ONE SIDE FIRST.
3. CORRECT PROCEDURE: TIGHTEN WHEEL NUTS TO THE MANUFACTURERS RECOMMENDED TORQUE & USE THE CORRECT TIGHTENING PATTERN.
4. WARNING: WE RECOMMEND YOU ADVISE THE VEHICLE OWNER WHEN WASHING CAR OR WHEELS NOT TO APPLY WATER DIRECTLY ONTO THE HOT ROTORS AS THIS WILL CAUSE THEM TO WARP.
5. BEFORE DISASSEMBLY: Establish the reason for replacing rotors. If it’s not due to normal wear and tear find the cause and correct it so it will not reoccur.
6. BEFORE FITTING NEW DISCS OR DRUMS: Compare and ensure they are the correct rotors or drums.
7. CLEAN RUST PROTECTION FROM THE BRAKING SURFACE. Use NON OIL BASED SOLVENT.
8. 2-PIECE REMOVABLE HAT TYPE:
REMOVE RUST OR BURS BETWEEN MATING SURFACES ENSURE THEY MATE PERFECTLY
Rust scale or corrosion usually develops during the rotors use on a car if this occurs on the two precision mating surfaces and is not removed,
c. The replacement rotor may not fit
d. The replacement rotor may be mounted unevenly resulting in excessive run out.
e. WARNING: Failure to clean and ensure surfaces mate perfectly will result in rotor run out
f. Use wire brush, sand paper to Clean hub surfaces.
9. BEARING TORQUE ADJUSTMENT
Check bearing cone and hub seal are both seated all the way into their respective recesses.
The hub seal must not be level it must be below the housing; otherwise it will jam on the stub axle making it impossible get a correct bearing adjustment.
Rotate the rotor while tightening the castle nut to 30Nm to seat the bearing,
Loosen castle nut ½ turn and re-tighten to 1.5Nm.
Install split pin and grease cap.
Check that the bearing play does not exceed the manufacturers tolerances
10. INCORRECT BEARING TORQUE ADJUSTMENT
If the castle nut is too tight, this will cause rotor drag and excessive wear on the bearings.
If castle nut is too loose, rotor run will occur.
If the hub seal fouls on the stub axle correct bearing adjustment is impossible, run out will occur
11. DTV, Disc Thickness Variation is when rotor run out causes abnormal wear to the part of the rotor surface constantly hitting and rubbing against the pads even when the brakes are not applied. Then when the brakes are applied this can result in a bad pedal feel, pulsating or shuddering pedal, knocking noise and in some cases a vibration through the steering.
12. ROTOR RUN OUT (RRT). Rotor Run-out test should not exceed 0.10mm. If this is exceeded remove the disc and recheck all mating surfaces. Recheck bearing cone and hub seal are pressed completely into the recess and not that the hub seal presses against the end of the stub axle making correct bearing adjustment impossible. Remount the disc in a different position, and check for run-out again