Thomas SAF-T-LINER C2, Maintenance Manual

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multipurpose chassis grease with a pressure gun
until the old grease is forced out.
Freightliner AirLiner Rear
Suspension
Lubrication is not required on single-axle spring rear
suspensions.
Freightliner Leaf Spring Rear
Suspension
Wipe all dirt from the grease fittings at the rear leaf
spring. Then apply multipurpose chassis grease with
a pressure gun until the old grease is forced out. See
Fig. 2 for the location of the grease fitting.
32–03 Suspension U-Bolt
Torque Checking
Check the U-bolt torque of both the front and rear
axles where applicable.
CAUTION
Failure to retorque the U-bolt nuts could result in
spring breakage and abnormal tire wear.
1. Park the vehicle on a flat surface and apply the
parking brake. Chock the tires.
2. Check the U-bolt torque in a diagonal pattern.
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.
U-Bolt High Nut Torque *
Size Torque: lbf·ft (N·m)
5/8–18
Stage 1: Hand tighten
Stage 2: 60 (81)
Stage 3: 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 the sequence shown in Fig. 3 .
Table 1, U-Bolt High Nut Torque
03/19/2014 f321178
1
1. Grease Fitting
Fig. 2, Grease Fitting, Freightliner Leaf Spring Rear
Suspension
f320783 10/05/2016
1
2 3
4
Fig. 3, Tightening Sequence for U-Bolt High Nuts
Suspension
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Saf-T-Liner C2 School Bus Maintenance Manual, June 2015
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