SHOP MANUAL
DRIVE LINE
Ch 3 page 70 Ch 3 page 71
DRIVE LINE
Torque Specification
Component Torque
Mounting Bolt s 400-500 lb-ft (544-680 N •m)
Chamber Nuts
• Air Release Brakes 135-155 lb-ft (180-210 N •m)
• Hydraulic Release Brakes 30-40 lb-ft (41-54 N •m)
Adjustment Plu g 8-12 lb-ft (11-17 N •m)
Conditions : Possible Cause(s): What to Check : Corrections:
À Chamber exceeds Incorrect initia
l
Check the chamber strok
e
If the air chamber stil l
two-inch maximu
m
adjustment o
r
after 20 brake overstrokes, replace th e
stroke requiremen
t
inoperative automatic applications . caliper/saddle assembly.
adjuster Refer to Sections 3 and 4 .
Á Brake drag Incorrect lining-to - Minimum stroke Replace the caliper/saddl e
rotor clearanc
e
7/8-inch (22 mm
)
assembly.
Incorrect initia
l
Adjust the rotor to pad
adjustment clearance. Refer to Section 4.
Vehicle brake releas
e
Correct operation of th
e
Repair or replace parts as
pressure malfunctio
n
quick release valve required.
 Short outboard Caliper seized or Damaged slide-pin seals Replace the caliper/saddle
brake pad lining lif e
sticking on slide pin
s
assembly.
Caliper should move
back and forth by hand
with linings remove
d
à Short lining lif e Refer to conditions Á Refer to conditions Á Refer to conditions Á and  .
and  . and  .
Rotor surface Cracks or heavy hea t Refer to Section 5 for disc
checking. Refer to inspection .
Section 5 .
Ä Brake smoking High brake Refer to conditions Á , Â Refer to conditions Á , Â
temperature and à . and à .
Grease, oil, etc., on Grease, oil, etc., on the Check for oil leaks in the
the linings linings brake area. Repair as
required. Clean the rotor
and caliper assembly.
Replace the linings.
Refer to Sections 3 and 4.
Å Poor stopping Vehicle brake release Correct operation of the Have the system evaluated
power pressure malfunction quick-release valve by a qualified brake syste m
specialist.
•• Long stoppin g Brakes out of Stroke exceeds Refer to condition À .
distances adjustment two-inch requiremen t
•• Poor driver fee l Vehicle overload Refer to the GAWR Observe the vehicle
•• Lack of normal limitations on the vehicle manufacturer 's load
response I.D. plate . recommendations .
Lining contamination Grease, oil, etc., on the Inspect for oil leaks in the
linings brake area. Repair as
required. Clean the rotor and
caliper assembly. Replace the
linings. Refer to Sections 3
and 4.
Hydraulic Release Parking Disc Brake
Troubleshooting Park brake
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