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

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

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 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

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 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

f400164

A. 8-Stud Disc Wheel

B. 10-Stud Disc Wheel

Fig. 1, Wheel Nut Tightening Sequence

Wheels and Tires

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Title of Maintenance Operation (MOP)

MOP Number

Driveline Inspecting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41–01

Driveline Lubricating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41–02

Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41–00

Driveline

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

Fig. 1

for an illustration of the ArvinMeritor

™

Full-Round driveline. See

Fig. 2

for an illustration of

the ArvinMeritor

™

Easy Service

™

or 1/2 Round

driveline.

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.

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.

Examine the slip yoke spline for excessive radial
movement. See

Fig. 3

. 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.

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

Fig. 4

for the areas that need lu-

brication. See

Table 1

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

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