B
48
Repair and Service Manual
BRAKES
Read all of SAFETY and this section before attempting any procedure. Pay particular attention to Notices, Cautions, Warnings and Dangers.
653045
Figure 11 Check Clevis Pins
6.
Inspect the brake cable equalizer linkage.
Inspect for corrosion, damage, wear or excessive
misalignment (Figure 12). Replace the cable if corro-
sion, damage, or wear is found.
7.
Inspect the compensator assembly.
Inspect for damage, corrosion or wear; replace com-
plete assembly if present. In general, adjustment will
not be necessary, as the spring assembly is factory
calibrated. With the parking brake disengaged,
check that the compensator spring length is 3-15/16"
(10 cm) (Figure 12). If an adjustment is required, it
must be made using the nuts towards the front of the
vehicle. Tighten the jam nut after your are finished
adjusting the compensator assembly.
8.
Inspect parking brake pedal hinge.
Check for broken springs, and correct retention of
the hinge pin. Operate the parking brake pedal to
confirm smooth operation of the hinge mechanism
Figure 12 Equalizer and Compensator
Figure 13 Parking Brake Pedal Hinge Inspection
9.
Check the condition and operation of the parking
brake latching mechanism.
The parking brake should latch firmly and release as
soon as the accelerator pedal is pressed.
To prevent serious injury or death
from the use of worn parking brake
components, do not attempt to re-
new worn parts. The parking brake latch arm, kick-
off cam and catch bracket are hardened parts. Do
not grind or file them, as doing so will cause the
Check for loose
clevis pin
Not to
exceed
1/8" (3 mm)
in either
direction
View From Below
Front
Spherical Nut
Lock Nut
3-15/16"
(10 cm)
Spring
Adjusting Nut
Jam Nut
NOTE: This dimension is factory pre-set with the
parking brake disengaged and should not be changed.
Normal
Position
Torsion Springs
Hinge Pin
Push Nut
Property of American Airlines