freightliner M2 Plus Maintenance Manual page 103

Wheels and Tires
40–01 Wheel Nut Checking
IMPORTANT: In addition to the maintenance
interval in this manual, check the wheel nut
torque the first 50 to 100 miles (80 to 160 km)
of operation after a wheel has been removed
and installed.
When checking wheel nuts on a stud-piloted dual
disc assembly, remove one outer nut at a time,
tighten the inner nut, then reinstall the outer nut.
Repeat this procedure for all of the inner wheel nuts
in the sequence shown in
the outer wheel nuts in the same sequence.
CAUTION
Too little wheel nut torque can cause wheel
shimmy, resulting in wheel damage, stud
breakage, and extreme tire tread wear. Too much
wheel nut torque can break studs, damage
threads, and crack discs in the stud hole area.
See Table 1 for wheel nut torque specifications and
see Fig. 1 for the tightening sequence.
Wheel Nut Torque Specifications
Thread
Wheel Manufacturer
Size
Accuride Corporation
M20 x 1.5
Alcoa Incorporated
Accuride Corporation
M22 x 1.5
Alcoa Incorporated
Accuride Corporation
1-1/8–16
Alcoa Incorporated
Accuride Corporation
3/4–16
Alcoa Incorporated
Table 1, Wheel Nut Torque Specifications
40–02 Tire Check
Tires should be inspected closely during the first
3000 to 10,000 miles (5000 to 16 000 km) for
abnormal wear.
Maintain the proper pressures for carried loads, per
the tire manufacturers' recommendations, or the tire
pressure label on the driver's door.
Business Class M2 Plus Maintenance Manual, 02/10/2023
Fig. 1, then tighten all of
Torque (oiled):
lbf·ft (N·m)
280 to 330 (380 to
447)
450 to 500 (610 to
678)
450 to 500 (610 to
678)
450 to 500 (610 to
678)
2
1
4
7
6
5
3 8
A
09/18/2001
A. 8-Stud Disc Wheel
Fig. 1, Wheel Nut Tightening Sequence
Have the wheel alignment checked after the first
10,000 miles (16 000 km), then every 40,000 miles
(60 000 km) thereafter.
Do not continue to drive the vehicle if tires develop
any of the following:
• blisters;
• cuts or punctures that reach to the cord;
• a nail, screw, rock, or other puncturing object;
• flat spots or irregular wear;
• tread worn to a minimum depth;
• inability to maintain proper tire pressure.
40
1
10
8
3 6
5 4
7 9
2
B
f400164
B. 10-Stud Disc Wheel
40/1