Rear Axle Lubrication - Peterbilt 579 Operator's Manual

Rear Suspension U-Bolts, Grade 8
(lubricated*)
U-BOLT SIZE TORQUE**
DIAMETER
Nm
THREAD
3/4 333-408
7/8 598-734
1 925-1,060
1-1/8 1,470-1,660 1,080-1,220
1,890-2,120 1,390-1,560
1-1/4
1-1/2 3,130-3,860 2,300-2,840
*Chevron Zinc Lubricant or SAE 20/30 oil
should be used on U-Bolt threads
**Torque requirements apply to manufacturer
proprietary suspensions. All other
suspensions must refer and adhere to
original manufacturers shop manual.
•
Load the vehicle to its normal
gross weight before tightening
U-bolts. Loading the vehicle
ensures proper adjustment of the
U-bolt and spring assembly.
(04/13)
Do not replace U-bolts and nuts with
common U-bolts or standard nuts.
These parts are critical to vehicle
Lb-Ft
safety. If the wrong U-bolts or nuts
245-300
are used, the axle could loosen or
440-540
separate from the vehicle and cause
680-780
a serious accident. Use only U-bolts
and nuts of SAE Grade 8 specification
or better. Failure to comply may result
in death, personal injury, equipment or
property damage.
REAR AXLE AND SUSPENSION
WARNING!
Y53-6047–2C

Rear Axle Lubrication

Check oil level with the vehicle parked
on level ground and the fluid warm.
The level should be even with the
bottom of the filler hole.
5
5-127