freightliner MC - Wheel Nut Checking

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.
NOTE: On each wheel stud, the end that faces
away from the vehicle is stamped with an "L" or
an "R," depending on which side of the vehicle
the stud is installed. Studs stamped with an "L"
are left-hand threaded and are installed on the
driver’s side of the vehicle. Studs stamped with
an "R" are right-hand threaded and are installed
on the passenger’s side of the vehicle.
When checking wheel nuts on a 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, Fig. 2,orFig. 3. 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 break-
age, and extreme tire tread wear. Too much wheel
nut torque can break studs, damage threads, and
crack discs in the stud hole area.
Tighten the wheel nuts.
• On 6-stud, stud-pilot hubs, tighten the wheel
nuts 450 to 500 lbf·ft (610 to 678 N·m). See
Fig. 1 for the tightening sequence.
• On 8-stud or 10-stud, hub-pilot hubs with
20-mm studs, tighten the wheel nuts 280 to 310
lbf·ft (380 to 420 N·m). See
Fig. 2 or Fig. 3 for
the tightening sequence.
• On 8-stud or 10-stud, hub-pilot hubs with
22-mm studs, tighten the wheel nuts 450 to 500
lbf·ft (610 to 678 N·m). See
Fig. 2 or Fig. 3 for
the tightening sequence.
NOTE: Wheel nuts for 20-mm stud hubs require
a 1- 3/16-inch (30-mm) socket. Wheel nuts for
22-mm stud hubs require a 1-5/16-inch (33-mm)
socket.
1
1
2
2
3
3
4
4
5
5
6
6
AB
08/20/96
f400119
A. Front and Inner Rear Dual
B. Outer Rear Dual
Fig. 1, Wheel Nut Tightening Sequence (6-stud hubs)
06/23/2000
A
B
1
f400159
3
7
8
4
6
5
2
2
4
8
7
3
5
6
1
A. Front and Inner Rear Dual
B. Outer Rear Dual
Fig. 2, Wheel Nut Tightening Sequence (8-stud hubs)
09/28/98
A
B
1
2
3
10
5
7
9
4
6
8
1
2
3
4
9
6
810
5
7
f400142
A. Front and Inner Rear Dual
B. Outer Rear Dual
Fig. 3, Wheel Nut Tightening Sequence (10-stud hubs)
Wheels and Tires 40
Recreational Vehicle Chassis Maintenance Manual, May 2011 40/1