Sterling Trucks Acterra MX - Manual (Page 80)

Hendrickson Spring-Eye Pins,
RT and RTE Series
NOTE: See Fig. 7 for this procedure.
Apply multipurpose chassis grease at the spring eye
pin grease fitting (located on the inboard side of the
spring eye pin) until clean grease appears at both
ends of the spring eye pin.
Freightliner TufTrac
The TufTrac suspension is maintenance-free and de-
signed so that lubrication is not required. There are
no provisions for lubrication and attempting to lubri-
cate the suspension could shorten component life.
32–03 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 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
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 Torque Values
Description Size
Torque:
lbf·ft (N·m)
Spring Assembly U-Bolt High Nuts *
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. 12 .
Table 1, U-Bolt Torque Values
Suspension
32
Acterra Maintenance Manual, September 2002 32/9