freightliner 108SD 2021, Driver Manual

Page: 84 / 191

NOTICE
Failure to tighten the U-bolt nuts to the specified
torque value could result in spring breakage and
abnormal tire wear.
1. Park the vehicle on a flat surface and apply the
parking brakes. Chock the tires to prevent the
vehicle from moving.
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
Fig. 8 for the tightening pattern. See Table 1 for
U-bolt torque specifications. Turn the wrench in a
clockwise motion (looking up) until the torque
wrench clicks.
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 Fig. 8 .
Table 1, Spring Assembly U-Bolt High Nut Torque
Values
09/15/95 f320424
1
2
2
3
4
4
1. Bronze Bushing
2. Lubrication Hole
3. Grease Fitting
4. Lubrication Groove
Fig. 7, Hendrickson RT2 and RTE2 Series Bushing
Lubrication
f320783 10/05/2016
1
2 3
4
Fig. 8, Tightening Pattern for U-Bolt High Nuts
Suspension
32
108SD and 114SD Maintenance Manual, September 2015
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