Meritor TM Series Service Manual page 23

4 Hub Service
Removal of the TM hub is required for all rotor replacements on
disc brake applications.
The TM axle fitted with Q or Z drum brakes features an inboard
mounted brake drum. Thus requiring the hub assembly to be
removed for brake service. In addition, hub removal will also be
required if a problem is identified during routine inspection, or at
the major hub service interval, as prescribed in Section 11.
For hub removal and replacement follow the appropriate
procedures detailed in this section.
DRUMBRAKE AXLES
Should it however prove necessary to remove the hub, the
following procedure can be performed either with the road wheel
and brake drum assembled to the hub or with the road wheel
and brake drum removed. In the latter instance follow the
procedure below.
CAUTION:
Meritor HVS recommends the use of a
wheel dolly to remove the wheel, hub, and drum
as an assembly. The wheel dolly can be used easily by one
man and will prevent seal and bearing damage.
Raise the vehicle enough to get clearance to remove the wheel
and tyre. Support the axle with safety stands.
WARNING
: Do not work under a vehicle
supported only by jacks. Jacks can slip or fall over
and cause serious personal injury. Support the vehicle with
safety stands, block the wheels to prevent the vehicle from
moving.
Remove the road wheel.
DE-ADJUST BRAKES
Using the manual adjustment nut on the slack adjuster fully de-
adjust the brake. Follow the appropriate procedure for the type of
automatic slack adjuster fitted. Instructions are available through
the Meritor Technical Sales Department.
NOTE
: Comprehensive Drum Brake instructions can be found in
the Meritor HVS service manual ;
S Cam Trailer Drumbrake - MM 1000
SAC Trailer Drumbrake - MM 0267
Meritor HVS TM Series Axle
23
DISC BRAKE AXLES
NOTE:
Comprehensive Disc Brake instructions can be found in
the appropriate Meritor HVS Service Manual detailed below;
DX 195/225 MM 1147
ELSA 2 MM 1130
Raise the vehicle enough to get clearance to remove the wheel
and tyre. Support the axle with safety stands.
WARNING
: Do not work under a vehicle supported
only by jacks. Jacks can slip or fall over and cause
serious personal injury. Support the vehicle with safety
stands, block the wheels to prevent the vehicle from moving.
Remove the road wheel.
Deadjust the brake. Remove the brake pads and air chamber
WARNING
: Always de-adjust/adjust the brake
carefully by hand with a suitable wrench. Never
exceed the maximum torque specified for the type of disc
brake in either direction and NEVER use power tools.
Remove the caliper mounting bolts (Fig 4.1). Take care not to allow
the caliper to fall. Remember that the caliper has a weight of upto
55kg.
Fig. 4.1
Lift the caliper away from the axle.