freightliner M2 Plus Maintenance Manual page 123

Brakes
Brake Component Inspection
Air Disc Brakes
IMPORTANT: The following step to inspect the
caliper mounting bolts should only be performed
at the initial maintenance (IM) interval.
Vehicles may have both axial and radial
mounted calipers. Follow the instructions based
on the type of calipers installed on the vehicle.
Axial Mounted Brakes
IMPORTANT: The following information applies
to all types of axial mounted brake applications.
1. Park the vehicle on a level surface, shut down
the engine, and set the parking brake. Chock the
tires.
2. Raise the vehicle and support it on jack stands.
3. Remove all of the wheel assemblies. For
instructions, seeGroup 40 of the Business Class
M2 Plus Workshop Manual for repair procedures.
NOTE: In all steps that require a torque wrench,
use a Snap On torque wrench ATECH4RS600,
or an equivalent, with a center to handle length
of 47 inches (119 cm).
4. Set a torque wrench to 350 lbf·ft (475 N·m) and
tighten the caliper mounting bolts following the
tightening pattern shown in
not turn, no further work is needed. If they turn,
take the vehicle to an authorized Freightliner
dealer to have all of the caliper bolts on that
wheel end replaced. Due to limited caliper bolt
access, it may be necessary to use tool DDC
DSNCHA018005 referenced in tool letter
18TL18. If the tool is needed, use tool DDC
DSNCHA018005 only and no other tools. See
Fig. 11. If the tool is needed, see
torque specifications for a 47 in (119 cm) long
wrench.
Business Class M2 Plus Maintenance Manual, 02/10/2023
Fig. 10. If they do
Table 3 for
2 1
3
03/26/2020
Fig. 10, Axial Bolt Tightening Pattern
09/28/2018
Fig. 11, DDC DSNCHA018005 30mm Air Disc Brake
Caliper Brake Bolt Torque Adaptor
42
4 5
6
f422665
f580518
42/11