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42–00 Safety Precautions

Safety Precautions in this section apply to all
procedures within this group.

DANGER

When working on the vehicle, shut down the
engine or motor, set the parking brake, and chock
the tires. Before working under the vehicle, always
place jack stands under the frame rails to ensure
the vehicle cannot drop. Failure to follow these
steps could result in serious personal injury or
death.

42–01 Air Brake System Valve

Inspection

NOTE: There is no scheduled air valve
maintenance on vehicles equipped with Bendix
air valves and a Bendix air dryer if the air dryer
desiccant is replaced at 350,000 miles (563 000
km). If the desiccant is not changed at 350,000
miles (563 000 km), or if the vehicle is equipped
with another air dryer, maintenance will have to
be performed to the air brake valves. See

Group 42

of the

eCascadia Workshop Manual

for procedures.

IMPORTANT: For vehicles equipped with an oil-
coalescing air dryer desiccant cartridge, replace
the cartridge once a year, regardless of mileage.

42–02 Brake Inspection

Parking Brake Operational Check

IMPORTANT: This procedure should be
performed prior to lubrication of the brake
components.

CAUTION

Perform the following check in a clear safe area. If
the parking brakes fail to hold the vehicle,
personal injury or property damage may result.

With the vehicle running, and air pressure at cut-
out pressure, set the parking brake.

Put the vehicle in the lowest gear and gently
attempt to move it forward. The vehicle should
not move. If the vehicle moves, the parking
brakes are not operating correctly and must be
repaired before the vehicle is returned to service.
See

Group 42

of the

eCascadia Workshop

Manual

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.

Park the vehicle on a level surface, shut down
the vehicle, and set the parking brake. Chock the
tires.

Raise the vehicle and support it on jack stands.

Remove all of the wheel assemblies. For
instructions, see

Group 40

of the

eCascadia

Workshop Manual

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).

Set a torque wrench to 350 lbf·ft (475 N·m) and
tighten the caliper mounting bolts following the
tightening pattern shown in

Fig. 1

. If they do 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. 2

. If the tool is needed, see

Table 1

for

torque specifications for a 47 in (119 cm) long
wrench.

Brakes

eCascadia Maintenance Manual, 10/03/2022

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