Freightliner FLA/FLB/FLC/FLD/FLL. Manual — part 24
U-Bolt Torque Values
Description
Size
Torque:
lbf·ft (N·m)
Spring Assembly U-Bolt High Nuts (Tighten in a diagonal
pattern as shown in
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)
Table 1, U-Bolt Torque Values
01/05/99
f320783
1
2
3
4
Fig. 23, Tightening Pattern for U-Bolt High Nuts
Suspension
32
32/13
Title of Maintenance Operation (MOP)
MOP Number
All-Axle Alignment Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33–03
Knuckle Pin Lubricating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33–01
Tie Rod Inspecting and Lubricating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33–02
Front Axle
33
Index, Alphabetical
Heavy-Duty Trucks Maintenance Manual, June 2001
33–01 Knuckle Pin Lubricating
CAUTION
Use regulated pressure when lubricating the
knuckle assemblies, otherwise damage could re-
sult to the knuckle caps.
Dana Spicer
Park the vehicle on a level surface, apply the parking
brakes, and chock the tires. When lubricating upper
and lower knuckle assemblies, do not raise the front
axle. Wipe the fittings clean, then 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 junctions of the axle beam and knuckles.
See
. Knuckle pins without grease fittings are
permanently lubricated.
Meritor
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
Freightliner
When lubricating upper and lower knuckle assem-
blies, do not raise the front axle. Wipe the lube fit-
tings 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 junc-
tions of the axle beam and knuckles. See
33–02 Tie Rod Inspecting and
Lubricating
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, see Group 33 of the
Heavy-Duty
Trucks Service Manual
.
11/21/95
f330129
1
1
A
A. Grease Exit
1.
Grease Fitting
Fig. 1, Dana Spicer Knuckle Pin Lubrication
09/06/96
f320032a
A
1
1
A. Grease Exit
1.
Grease Fitting
Fig. 2, Meritor Knuckle Pin Lubrication
Front Axle
33
Heavy-Duty Trucks Maintenance Manual, June 2001
33/1
3.
For any Dana Spicer, Meritor, or Freightliner 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.
33–03 All-Axle Alignment
Checking
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
Heavy-Duty Trucks Service 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. Check that the safety stands will
support the combined weight of the cab, axle,
and frame. 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. Raise the front of the vehicle, remove the
safety stands from under the axle, then 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 and then
forward about six feet (two meters).
f320360a
05/31/2005
1
1
A
Pump lubricant into each grease fitting until fresh grease
come out at point
A.
1.
Grease Fitting
Fig. 3, Freightliner Knuckle Pin Lubrication
f320033a
1
OK
OK
02/27/2007
NOTE: Pinch bolt not shown to provide clarity.
1.
Cross-Tube Split
Fig. 4, Tie-Rod End Adjustment
Front Axle
33
Heavy-Duty Trucks Maintenance Manual, June 2001
33/2
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