Disc Brake Axles - Meritor TM Series Service Manual

7 ABS Component Replacement
The sensor may be rotated in the mounting block to allow the
cable to pass either side of the anchor bracket.
Pass the sensor cable through the dust cover using the uppermost
hole and fit the strain relief grommet.
Ensure the lower cable exit hole in the dust cover is fitted with a
blanking plug.
CHECKING SENSOR OUTPUT
Connect the output cable to a suitable multimeter.
Rotate the hub by hand at a constant rate of approximately 30
rpm and note the maximum and minimum readings. The minimum
permissible voltage reading is 400 millivolts and the ratio of
maximum/minimum should not exceed 2.
If either values are not obtained check the installed air gap
between the sensor and pole wheel does not exceed 0.7
millimeters and the pole wheel run out does not exceed 0.2
millimeters.
If the installation is still not correct, contact the supplier of the ABS
equipment for further advice.

DISC BRAKE AXLES

Remove the Hub as described in Section 4 Hub Removal &
Replacement
FITTING A NEW ABS RING
Most new rotors are supplied with the ABS ring as an integral
component and if there is damage to the ABS ring a new rotor
must be fitted. However, For DX disc brake applications the new
rotor may utilises a press fit ABS ring, if necessary follow the
procedure detailed below.
Place the hub on a suitable flat clean surface with the rotor placed
loose on its mounting spigot. Push the ABS tube into the rotor (Fig.
7.3).
Using an LM oil seal driver (Meritor CVA part No. MST 3202),
gently tap the ABS tube over its spigot on the hub (Fig. 7.4).
Keep the pole wheel square at all times and do not use excessive
force to avoid damage to the thin tube.
When the pole wheel is approximately 4mm below the face of the
rotor, gently lift the rotor up off the hub spigot and lower it back, to
ensure the barbs on the tube engage properly onto the step in the
rotor bore. (Fig. 7.5).
Fig. 7.3
Fig. 7.4
Fig. 7.5
Meritor HVS TM Series Axle
36