Chrysler RAM TRUCK 2500 1994 Service Manual page 214

2-wheel d r i v e models, be sure wheel bearing
end play is reduced to zero before checking
r u n o u t .
Maximum allowable lateral runout is 0.127 mm
(0.005 in.).
INDICATOR
I M
„
Z Q
J8905-68
Fig. 32 Measuring Rotor Lateral Runout
R O T O R REFINISHING
Rotor braking surfaces can be refinished by sand­
ing and/or machining i n a disc brake lathe (Fig. 33).
The lathe must be capable of machining both rotor
surfaces simultaneously with dual cutter heads.
Equipment capable of machining only one side at a
time will produce a tapered rotor.
The lathe should also be equipped with a grinder
attachment or dual sanding discs for final cleanup or
light refinishing.
I f the rotor surfaces only need minor cleanup of
rust, scale, or scoring, use abrasive discs to clean up
the rotor surfaces. However, when a rotor is scored or
worn, machining with cutting tools will be required.
CAUTION: Do not refinish a rotor if machining
would c a u s e the rotor to fall below minimum allow­
able thickness.
The recommended final finish on a rotor braking
surface is shown i n Figure 34. The final finish should
be a non-directional, cross hatch pattern. Sanding
discs are required to produce this type of finish.
DISC BRAKE ROTOR REMOVAL (2-WHEEL
DRIVE)
(1) Raise vehicle.
(2) Remove wheel and tire assembly.
(3) Bottom caliper piston in bore. Use screwdriver
or large C-clamp to press piston back to bottom of
caliper bore (Fig. 7).
(4) Remove caliper mounting bolts (Figs. 8 and 9).
J8905-70
Fig. 33 Rotor Refinishing Equipment
(5) Remove caliper from rotor. Position caliper on
steering knuckle and secure i t with wire (Figs. 13
and 14).
CAUTION: Do not allow the brake hose to support
the caliper. Suspending the caliper by the brake
hose can damage the hose and fitting joints. U s e
wire to support and secure the caliper to a s u s p e n ­
sion component a s shown (Figs. 13 and 1 4 ) .