Freightliner Business Class M2. Manual — part 22
Title of Maintenance Operation (MOP)
MOP Number
Tire Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40–02
Wheel Nut Checking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40–01
Wheels and Tires
40
Index, Alphabetical
Business Class M2 Maintenance Manual, November 2015
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. Re-
peat this procedure for all of the inner wheel nuts in
the sequence shown in
, 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.
See
for wheel nut torque specifications and
see
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 abnor-
mal 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
A
B
f400164
1
10
8
6
3
5
4
9
2
7
1
2
4
6
7
5
8
3
A. 8-Stud Disc Wheel
B. 10-Stud Disc Wheel
Fig. 1, Wheel Nut Tightening Sequence
Wheels and Tires
40
Business Class M2 Maintenance Manual, November 2015
40/1
Title of Maintenance Operation (MOP)
MOP Number
Driveline Inspecting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41–01
Driveline Lubricating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41–02
Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41–00
Driveline
41
Index, Alphabetical
Business Class M2 Maintenance Manual, August 2015
41–00 Safety Precautions
Safety Precautions in this section apply to all
procedures within this group.
DANGER
When working on the vehicle, shut down the en-
gine, 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 can not drop. Failure to follow these steps
could result in serious personal injury or death.
41–01 Driveline Inspecting
Driveline Inspection
WARNING
Do not service or inspect a driveshaft with the en-
gine running. A rotating driveshaft can cause seri-
ous personal injury.
Loose end yokes, excessive radial looseness, slip
spline radial looseness, bent shaft tubing, or missing
plugs in the slip yoke can cause universal joint and
bearing defects.
See
for an illustration of the ArvinMeritor
™
Full-Round driveline. See
for an illustration of
the ArvinMeritor
™
Easy Service
™
or 1/2 Round
driveline.
1.
Check the output and input end yokes on both
the transmission and axle for axial looseness.
Refer to the axle or transmission manufacturer’s
service information for the correct specifications.
If loose, disconnect the driveshaft. For instruc-
tions, see Group 41 of the Business Class® M2
Workshop Manual. Tighten the end yoke retain-
ing nut to the proper specification. Refer to the
axle or transmission manufacturer’s service infor-
mation for the correct specifications.
2.
Inspect for worn universal joints. Apply a vertical
force of about 50 pounds to the driveline near
the universal joints. If there is any movement,
replace the universal joint. For instructions, see
Group 41 of the Business Class® M2 Workshop
Manual.
3.
Examine the slip yoke spline for excessive radial
movement. See
. If excessive radial loose-
ness exists between the slip yoke and the tube
shaft, replace the slip yoke and the tube shaft.
For instructions, see Group 41 of the Business
Class® M2 Workshop Manual.
4.
Examine the shaft for damaged or bent tubing.
Carefully remove any foreign material, such as
mud or dirt on the shaft.
41–02 Driveline Lubricating
Driveline Lubrication
The Full-Round and Easy Service drivelines require
periodic lubrication of the universal joints and slip
yoke splines. See
for the areas that need lu-
brication. See
for approved lubricants.
09/19/2001
f410483
Fig. 1, Full-Round Driveline
09/19/2001
f410484
Fig. 2, Easy Service (1/2 Round) Driveline
Driveline
41
Business Class M2 Maintenance Manual, August 2015
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