SAF-HOLLAND XL-TA10006OM Drum Brake Axles Tapered and Parallel Spindle Axles - Manual (Page 18)

18 XL-TA10006OM-en-US Rev B · 2014-03-13 · Amendments and Errors Reserved · © SAF-HOLLAND, Inc., SAF-HOLLAND, HOLLAND, SAF,
and logos are trademarks of SAF-HOLLAND S.A., SAF-HOLLAND GmbH, and SAF-HOLLAND, Inc.
Brake Shoe Replacement
Figure 27
Figure 28
5. Discard the used brake hardware.
IMPORTANT: Brake hardware such as brake rollers,
roller retaining clips and brake return
springs experience fatigue during their
normal lifespan and could not have the
same performance characteristics as
new components. Since most of these
brake components are supplied new
with the brake overhaul kit, the existing
components should not be re-used.
6. With the brake shoes off, inspect the S-Camshaft and
S-Camshaft bushings for wear. Verify that S-Cam-to-bushing
radial free play is within specification by using a dial
indicator and moving S-Camshaft back and forth.
(Figure 27) Rotate the S-Camshaft in all directions
when checking for radial free play.
NOTE: Use a dial indicator to verify that S-Cam-to-bushing
free play is 0.030" (0.76 mm) or less.
„ If radial free play is less than 0.030" (0.76 mm):
DO NOT replace the bushings and seals.
„ If radial free play is more than 0.030" (0.76 mm):
Replace the bushings and seals.
7. Inspect brake shoes and components for wear:
a. Inspect the spider for expanded anchor pin holes and
for cracks. Brake spiders cannot be repaired and must
be replaced with new axle assembly.
b. Inspect the S-Camshaft bracket for broken welds, cracks
and correct alignment. Replace damaged brackets.
c. Inspect the anchor pins for corrosion and wear.
Replace worn or damaged anchor pins.
NOTE: Follow brake shoe manufacturer specifications
for minimum brake shoe thickness and maximum
brake drum inner diameter. A general guideline for
replacing brake shoes is when the lining thickness
is 1/4" (6 mm) or less, or when the lining rivets
have begun to contact the drum (Figure 28).
Failure to replace brake shoes that are
excessively worn could result in damage
to brake drum or other components
d. Inspect the brake shoes for wear, expanded rivet holes,
broken welds and correct alignment. Replace shoes as
a set with any of the above conditions.
S-CAM END ANCHOR PIN END
WEAR LIMIT
1/4" (6
mm )
MINIMUM
DIAL INDICATOR
S-CAMSHAFT