freightliner M2 Plus - Page 103

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
Fig. 1, then tighten all of
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
Size
Wheel Manufacturer
Torque (oiled):
lbf·ft (N·m)
M20 x 1.5
Accuride Corporation
280 to 330 (380 to
447)
Alcoa Incorporated
M22 x 1.5
Accuride Corporation
450 to 500 (610 to
678)
Alcoa Incorporated
1-1/8–16
Accuride Corporation
450 to 500 (610 to
678)
Alcoa Incorporated
3/4–16
Accuride Corporation
450 to 500 (610 to
678)
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.
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.
09/18/2001
AB
f400164
1
10
8
63
54
9
2
7
1
2
4
6
7
5
83
A. 8-Stud Disc Wheel B. 10-Stud Disc Wheel
Fig. 1, Wheel Nut Tightening Sequence
Wheels and Tires 40
Business Class M2 Plus Maintenance Manual, 02/10/2023 40/1