Rotor Refinishing; Rotor Replacement - Jeep 1979 CJ-5 Technical & Service Manual

26-52 BRAKES
M O U N T ON
B E A R I N G CUPS
W H E N M E A S U R I N G
4 2 8 8 7
Fig. 2G-57 Checking H u b - M e r e Runout
(5) If rotor surfaces are not scored or otherwise
damaged and measurements are within tolerance, rotor
can be reused without further servicing.
(6) If rotor surfaces are rusted or scaled, or only
lightly scored and rotor meets all measurememt toler-
ances, resurface rotor. Refer to Rotor Refinishing.
Rotor Reftnising
If the rotor surfaces are within specified tolerances
and are only lightly scored or rusty and scaled, a brake
lathe and flat sanding discs are all that is needed to
restore the surface finish.
If the rotor surfaces are heavily scored or not within
tolerance, the rotor will have to be turned in a brake
lathe to restore the surface finish and meet required
tolerances. When machining a rotor, be sure to follow
t h e l a t h e m a n u f a c t u r e r s o p e r a t i n g i n s t r u c t i o n s
explicitly.
The correct rotor surface finish is 15 to 80 micro
inches for CJ models and 20 to 60 micro inches for all
other models. The finished rotor surface must form a
nondirectional
C r o s s h a t c h
pattern. A directional type of
pattern is not desirable. After machining a rotor, use
flat sanding discs to generate the desired microfinish
and Crosshatch pattern (fig. 2G-58).
When rotor resurfacing or refinishing operations are
completed, recheck lateral runout, thickness variation,
and overall thickness to be sure the rotor meets all
specified tolerances.
Fig. 2S-58 Correct Mm Finish
f l i i i r s i t i i i i i Cresslifil Pattern)
Rotor Replacement Thickness
Replace the rotor if refinishing will cause the rotor to
fall below the minimum thickness specification of 0.815
inches (20.7 mm) on CJ models or 1.215 inches (30.8 mm)
on Cherokee, Wagoneer and Truck models. Do not at-
t e m p t to use a r o t o r t h a t does not meet t h i s
specification.
Rotor Replacement—CJ Models
Removal
(1) Raise and support vehicle.
(2) Remove caliper. Refer to Brakeshoe Replace-
ment—CJ Models.
(3) Remove hub cap.
(4) Remove hub cover attaching bolts and remove
cover and gasket.
(5) Remove drive flange snap ring and remove drive
flange.
(6) Straighten lip of outer locknut retaining washer.
(7) Remove outer locknut and retaining washer,
and inner locknut and retaining washer.
(8) Remove rotor.
(9) Remove wheel bearings from rotor.
Installation
(1) Lubricate wheel bearings with EP-type, water
proof wheel bearing lubricant.
(2) Install wheel bearings and replacement grease
seal in rotor.
(3) Install rotor.
(4) Install tabbed inner washer and inner locknut.
(5) Install wheel but do not tighten wheel nuts
completely.
(6) Tighten inner locknut to 50 foot-pounds (68