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Component
(Item / Condition)
Consumable Items: These are considered to be normal wear items and should be repaired as part of regular preventive maintenance.
Measure the thickness of the total pad
A
Worn
(friction material and backing plate).
Measure the thickness of the total pad in
Uneven wear
at least two (2) places at top and two (2)
B
on single pad
places at bottom, at least 1/2 inch from
the edge.
Uneven wear
Measure the pad thickness as described
C
on inboard vs.
for Item B, but also check guide pin wear
outboard
and slide-ability.
Inspect for minor chips near the edge
Surface
D
and cracks on face (permitted) vs. major
damage
sections damaged or missing.
Inspect the tappet and guide pin boots for
E
Tears & cuts
cuts, cracks, and tears.
Inspect as Item E, but also check the
F
Melting
running clearance before removing the
brake pads.
With the pads removed, the caliper should
move freely by hand. Re-torque the
G
Binding
carrier to torque plate bolts per the OE
spec and procedure, if binding.
Feel for excessive play between the caliper
H
Excessive play
and the carrier.
Measure the rotor thickness with a long
I
Worn
jaw caliper.
Minor cracks and grooves are acceptable,
Surface
J
but check for cracks over the outside
damage
edge.
Non-Serviceable: These are non-serviceable items and pending warranty terms; these issues may be covered under warranty.
If the 2
Adjuster
K
turning the 10mm box-end wrench
not rotating
counterclockwise, the adjuster is seized.
Adjuster
With the brakes released, check the
L
too tight,
running clearance between the tappet
dragging brake
and the inboard pad.
Investigation
nd
sheer adapter breaks while
Specs
Pads must be replaced when they
reach 0.433 in. (11 mm).
The average difference of top vs.
bottom, or left vs. right, should be
no greater than 0.080 in. (2 mm).
Average difference inboard to
outboard should be no greater
than 0.138 in (3.5 mm).
See Figure 24 in SD-23-7541.
Any damage must be repaired.
Any damage must be repaired.
See Figure 26 (slide) and Table 4
(torque) in SD-23-7541.
See Figure 27 in SD-23-7541.
Thickness must be greater than
1.46 in. (37 mm).
See Figure 25 in SD-23-7541 for
surface details.
Adjuster must turn in both
directions with a hand wrench.
The gap should be between
0.024 in. (0.6 mm) and
0.043 in. (1.1 mm).
Procedure
What To Replace
Replace the pads on both
Section 4.3
sides of the worn axle.
Section 4.3.2
Replace the pads on both
sides of the worn axle and
replace the guide pins as
needed.
Section 4.3.3
Replace the pads on both
Section 4.3.3
sides of the worn axle.
Sections
Replace the damaged boots
4.5.4 & 4.6.2
and replace the resultant
internal corroded guide pins
See Calipers
as needed.
Item L
Replace the worn guide pins as
Sections
needed and replace the torque
4.5.1 & 5.3
plate if the re-torque procedure
does not resolve the issue.
Replace the worn guide pins
Section 4.5.2
as needed.
Refer to the OEM
recommendations for non-
Bendix
®
rotors. For Bendix
rotors, replace the rotors on
both sides of the axle.
Section 4.4
Refer to the OEM
recommendations for non-
Bendix rotors. For Bendix
rotors only, replace the rotor
that is damaged.
Section 4.4
Caliper only must be replaced
with malfunctioning adjuster.
Section 4.1
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