freightliner COLUMBIA CL112 Maintenance Manual page 72

Suspension
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
Table 1 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
Stage 1: Hand Tighten
Stage 2: 60 (81)
5/8–18
Stage 3: 200 (271)
Stage 4: 180 to 230 (245 to 313)
Stage 1: Hand Tighten
Stage 2: 60 (81)
3/4–16
Stage 3: 200 (271)
Stage 4: 270 to 330 (367 to 449)
Stage 1: Hand Tighten
Stage 2: 60 (81)
7/8–14
Stage 3: 200 (271)
Stage 4: 420 to 500 (571 to 680)
Stage 1: Hand tighten
Stage 2: 60 (81)
1–14
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
4
2
01/05/99
Fig. 11, Tightening Pattern for U-Bolt High Nuts
Columbia Maintenance Manual, February 2010
Torque: lbf·ft (N·m)
Fig. 11.
Values
1
3
f320783
*
32
32/7