operators_manual

Tightening
Specification lb-ft
(N•m)
Fastener Size
(-in.)
990-1,170 (1,346-
1,591)
1-1/8
1,380-1,630 (1,877-
2,217)
1-1/4
Metric Fastener
Size (with
NYLON insert
nuts)
Tightening
Specification lb-ft
(N•m)
M5 6-9 (8-12)
M6 7-11 (9-15)
M8 17-23 (23-31)
Where fasteners with all-metal lock-
nuts are indicated in the following
table
NOTE
The torque values and instructions
with
the following table apply ONLY to
all-metal lock nuts (left image) but do
NOT apply to Nylon lock-nuts (right im-
age).
• Do NOT lubricate all-metal lock-
nuts.
•
Bolts and washers can be reused,
but nuts can only be reused once.
If in doubt, install new nuts.
• If a bolt must be replaced the nut
installed on it must also be
replaced.
• Fasteners must be torqued from
the nut to achieve correct clamp
load.
Metric Fastener
Size (with all
MET
AL Lock-
nuts)
Tightening
Specification lb-ft
(N•m)
M10 29-41 (39.4-55.6)
M12 51-69 (69.1-93.5)
M16 125-165
(169.5-223.7)
M20 230-300
(311.8-406.8)
Suspension U-Bolts, Grade 8
T
ighten all U-bolts with a torque wrench.
Torque requirements in the table below
apply to PACCAR proprietary suspensions
using Protec Torque/TEXO coated U-bolts,
only. For all other suspensions, follow the
manufacturer's recommended torque
values. 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.
MAINTENANCE - Specification Reference Charts
Y53-6110-1A1 (01/21) 307
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