Freightliner Columbia. Manual — part 17
1.
Park the vehicle on a flat surface and apply the
parking brakes. Chock the tires.
2.
Check the U-bolt torque in a diagonal pattern.
Set a click-type torque wrench to the highest
torque value for the fastener being checked. See
for U-bolt torque specifications. Turn the
wrench in a clockwise motion (looking up) until
the torque wrench clicks.
3.
Remove the chocks.
Spring Assembly U-Bolt High Nut Torque Values
*
Size
Torque: lbf·ft (N·m)
5/8–18
Stage 1: Hand Tighten
Stage 2: 60 (81)
Stage 3: 200 (271)
Stage 4: 180 to 230 (245 to 313)
3/4–16
Stage 1: Hand Tighten
Stage 2: 60 (81)
Stage 3: 200 (271)
Stage 4: 270 to 330 (367 to 449)
7/8–14
Stage 1: Hand Tighten
Stage 2: 60 (81)
Stage 3: 200 (271)
Stage 4: 420 to 500 (571 to 680)
1–14
Stage 1: Hand tighten
Stage 2: 60 (81)
Stage 3: 200 (271)
Stage 4: 520 to 600 (707 to 816)
*
Tighten in a diagonal pattern as shown in
Table 1, Spring Assembly U-Bolt High Nut Torque
Values
03/10/2011
f320783
1
2
3
4
Fig. 11, Tightening Pattern for U-Bolt High Nuts
Suspension
32
32/7
Title of Maintenance Operation (MOP)
MOP Number
All-Axle Alignment Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33–04
Basic Inspection, Meritor Unitized Wheel Ends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33–07
End-Play Check, Meritor Unitized Wheel Ends. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33–08
Axles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33–09
Knuckle Pin Lubrication, Dana Spicer Axles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33–05
Knuckle Pin Lubrication, Meritor Axles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33–01
Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tie Rod Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33–02
Tie Rod Lubrication, Dana Spicer Axles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33–06
Axles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33–10
Tie Rod Lubrication, Meritor Axles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33–03
Front Axle
33
Index, Alphabetical
Safety Precautions
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.
33–01 Knuckle Pin Lubrication,
Meritor Axles
CAUTION
Use regulated pressure when lubricating the
knuckle assemblies, otherwise damage could re-
sult to the knuckle caps.
When lubricating knuckle pin bushings, do not raise
the front axle. Wipe the lube fittings clean, and apply
multipurpose chassis grease, NLGI Grade 1 (6% 12-
hydroxy lithium stearate grease) or NLGI Grade 2
(8% 12-hydroxy lithium stearate grease) until new
grease is seen at the bushing grease seal opposite
the fittings. The grease seal will accept grease pres-
sure without damage, and is designed to have
grease pumped out through it during lubrication.
Even if grease leaks out around the top, or bottom-
plate gasket, continue pumping until new grease is
seen at the bushing seal opposite the grease fitting.
See
33–02 Tie Rod Inspection
Inspect the tie-rod ends as follows:
1.
Shake the cross-tube. A loose fit, or movement
between the tapered shaft of the ball and the
cross-tube socket members indicates that the
tie-rod end assembly must be replaced.
2.
The threaded portion of the tie-rod end assembly
must be inserted all the way into the cross-tube
split for adequate clamping. See
. Replace
the components if this cannot be done. For in-
structions, refer to Group 33 of the Columbia®
Workshop Manual.
09/06/96
f320032a
A
1
1
A. Grease Exit
1.
Grease Fitting
Fig. 1, Meritor Knuckle Pin Lubrication
f320033a
1
OK
OK
02/27/2007
NOTE: Shown without pinch bolt to provide clarity.
1.
Cross-Tube Split
Fig. 2, Tie-Rod End Adjustment
Front Axle
33
33/1
33–03 Tie Rod Lubrication,
Meritor Axles
For any Meritor axle that requires lubrication of the
tie-rod ends, wipe the grease fittings clean, then
pump multipurpose chassis grease, NLGI Grade 1
(6% 12-hydroxy lithium stearate grease) or NLGI
Grade 2 (8% 12-hydroxy lithium stearate grease),
into the tie-rod ends until all used grease is forced
out and fresh grease is seen at the ball stud neck.
33–04 All-Axle Alignment
Check
Drive Axle Alignment Checking
Check the axle alignment, parallelism, and thrust
angle measurements for the rear drive axles. Use the
applicable procedure and specifications in Group 35
of the Columbia® Workshop Manual.
Toe-In Inspection
For vehicle alignment to be accurate, the shop floor
must be level in every direction. The turn plates for
the front wheels must rotate freely without friction,
and the alignment equipment must be calibrated
every three months by a qualified technician from the
equipment manufacturer. Freightliner dealers must
have proof of this calibration history.
1.
Apply the parking brakes and chock the rear
tires.
2.
Raise the front of the vehicle until the tires clear
the ground. Place safety stands under the axle.
3.
Using spray paint or a piece of chalk, mark the
entire center rib of each front tire.
4.
Place a scribe or pointed instrument against the
marked center rib of each tire, and turn the tires.
The scribe must be held firmly in place so that a
single straight line is scribed all the way around
each front tire.
5.
Place a turn-plate or turntable under both front
tires. Remove the safety stands and lower the
vehicle. Remove the lock-pins from the gauges;
make sure the tires are exactly straight ahead.
NOTE: If turn-plates or turntables are not avail-
able, lower the vehicle. Remove the chocks
from the rear tires and release the parking
brakes. Move the vehicle backward, then for-
ward about six feet (two meters).
6.
Place a trammel bar at the rear of the front tires;
locate the trammel pointers at spindle height,
and adjust the pointers to line up with the scribe
lines on the center ribs of the front tires. See
. Lock in place. Check that the scale is set
on zero.
7.
Place the trammel bar at the front of the tires
(see
) and adjust the scale end so that the
pointers line up with the scribe lines. See
8.
Read the toe-in from the scale, and compare it to
the toe-in specification in Group 33 of the
Columbia® Workshop Manual. If corrections are
needed, refer to Group 33 of the Columbia®
A
B
f330082a
08/29/94
NOTE: B minus A equals toe-in.
Fig. 3, Wheel Toe-In (overhead view)
f330014a
08/30/94
Fig. 4, Trammel Bar Positioning
Front Axle
33
33/2
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