User Manual

Fastener
Fastener
Name
Torque lb-ft
(N•m)
0.75 NF Spring
center bolt
165–210
(224–285)
29
1 NF U-bolt,
spring
30
Refer to
section on
Suspension
U-Bolts,
Grade 8.
0.5 UNC Air bag stud
nut
40–50 (54–
68)
M16 Tracking
rod bolts
155–195
(210–264)
Air-Trac Fastener Torque Values
Fastener
Fastener
Name
lb•ft (N•m)
M16 Tracking
rod bolts
155–195
(210–264)
0.75 NF Spring
center bolt
165–210
(224–285)
31
M16 0.75
NF
Radius rod
bolts
(forward)
155–195
(210–264)
Radius rod
bolts (at
axle)
250–350
(339–475)
M16 Frame
bracket
bushing
bolts
50–65 (68–
88)
Fastener
Fastener
Name
lb•ft (N•m)
1.0 NF
U-bolt
32
Refer to
section on
Suspension
U-Bolts,
Grade 8.
0.5 UNC Air bag stud
nut
40–50 (54–
68)
M16 Tracking
rod bolts
155–195
(210–264)
29
Torque requirement applies at subassembly of air spring support and leaf spring only.
30
PACCAR proprietary suspension U-bolts must be tightened in a specific sequence. Take your vehicle to an authorized dealer to
tighten the U-bolts on your vehicle.
31
Torque requirement applies at subassembly of airspring support and leaf spring only.
32
See owners manual for torque tightening sequence.
MAINTENANCE - Specification Reference Charts
Y53-6113-1A1 (11/20) 285
5