freightliner M2 Plus 2023 Manual page 194

Manual Transmissions, Clutch, and Transfer Cases
Follow the operating guidelines in
driving a vehicle equipped with a Meritor MTC
transfer case.
Engaging and Disengaging the Steer
Axle
Dash-mounted switches control the transfer case
functions; see Chapter 4
IMPORTANT: The wheels must not slip during
engagement of the steer axle driveline.
To engage the steer axle driveline, drive the vehicle
at a constant speed below 10 mph (16 km/h) and
Range Traction Conditions
Most normal driving conditions (such as
HIGH dry or wet pavement or mixed road
RANGE surfaces) when moderate to high
vehicle speeds are appropriate.
LO Not applicable. Do not use LO RANGE unless the steer
RANGE
IMPORTANT: Engaging the steer axle will increase the turning radius of the vehicle.
Shifting Between HIGH RANGE and LO
RANGE
MTC Series transfer cases use an air cylinder to shift
between HIGH RANGE and LO RANGE. A dash-
mounted switch operates the shift mechanism (see
Chapter 4 for more information).
Shift between HIGH RANGE and LO RANGE, as
follows:
1. Stop the vehicle.
2. Shift the transmission to NEUTRAL.
3.
Apply the parking brake.
4. Move the dash-mounted switch to the HIGH or
LO RANGE position to pressurize the shift
mechanism in the transfer case. An audible
engagement may be heard (which is normal).
15.7
Table 15.2 when
for more information.
Disengaged Steer Axle
axle is engaged.
Table 15.2, Operating Guidelines, Meritor MTC Transfer Cases
press the AWD switch. An audible engagement may
be heard.
To disengage the steer axle, drive the vehicle at a
constant speed below 10 mph (16 km/h) and press
the AWD switch. An audible disengagement may be
heard. If the steer axle driveline does not disengage,
the steer axle driveline coupling may be in a bind.
Turn the steering wheel back and forth while driving,
or briefly drive the vehicle in reverse.
Applicable
Vehicle Traction Conditions
Speeds
When more traction is needed at
0 mph (0 moderate to low vehicle speeds on dirt
km/h) to or gravel surface with shallow to
maximum moderate grades (8% maximum), icy or
vehicle speed snow-covered roads, or hard-packed
When maximum power and maximum
traction is needed on steeper grades
(15% maximum), deeply rutted tracks,
deep mud or snow, extremely rocky
surfaces, or soft, loamy sand.
5. Shift the transmission to FIRST gear and apply
light torque to test the engagement.
If the shifter does not engage when shifting from
HIGH RANGE to LO RANGE, shift the
transmission into REVERSE, then NEUTRAL,
and apply light torque to engage the LO RANGE.
Engaging PTO
Some vehicles are equipped with a PTO mounted to
a Meritor MTC transfer case. For these vehicles,
engage the PTO only when the transfer case is in
neutral, the transmission is in neutral/park, and the
parking brake is applied. To begin using the PTO,
select the drive gear based on the PTO system
operators manual.
Engaged Steer Axle
Applicable
20 mph (32
km/h) or less
sand.
15 mph (24
km/h) or less
Vehicle
Speeds