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2 Pad replacement
It is now possible to remove the pad strap and PWWI assembly as
far as the connecting cable will allow. Ensure that this cable is not
stretched.
NOTE
: It may be necessary to de-adjust the brake initially to
remove the worn brake pads. Remove the adjuster stem
protecting cap (33). Locate a suitable 10 mm socket spanner on
the adjuster stem (17) and rotate the spanner in an anticlockwise
direction as viewed from the air actuator side. Fig. 9
WARNING
Always de-adjust/adjust the brake carefully by hand with a
suitable spanner.
Never exceed a maximum torque of 40 Nm in either
direction and NEVER use power tools.
NOTE
: de-adjustment requires a higher torque than adjustment.
Fig. 9
C - Cleaning and inspection
With the brake pads removed check the integrity of the guide
sleeve and tappet excluders.
They should be secure and free from any signs of damage. If
damaged they should be replaced by following the procedures
laid out in Sections 6 and 7. Check that the Brake housing
assembly slides freely on the guide sleeves.
WARNING
Take care not to trap fingers whilst checking the sliding
action of the brake.
Examine the brake rotor for corrosion, grooving and signs of deep
cracks. If there is any doubt in the serviceability of any component
refer to the vehicle manufacturer for corrective action.
Whilst wearing suitable eye protection remove all traces of scale,
dirt etc, from the pad apertures /abutment faces and around the
edge of the rotor, particularly that encroaching onto the braking
area.
A scraper or old screwdriver supported on the caliper body whilst
the rotor is rotated will remove most of the corrosion. Finish off if
necessary with emery cloth. Remove all traces of scale, dirt etc,
from pad apertures and abutment faces that may restrict the
movement of the pads and, therefore, prevent sufficient
adjustment of the brake.
ArvinMeritor Air Disc Brake ELSA 195
17
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