Kenworth T410, Driver'S Handbook Manual

Page: 312 / 418

Page 286 CAT: 8612 November 2019
PREVENTIVE MAINTENANCE
REAR AXLE AND SUSPENSION
GENERAL MAINTENANCE
Your vehicle’s suspension, by design, requires a minimal amount of
maintenance. However, suspensions in ‘over-the-road’ operations require
periodic inspection to ensure trouble-free performance.
Do not work on the vehicle without the
parking brake set and wheels chocked
securely, using rubber wheel chocks
against the front and rear surfaces of the
tyres. Be sure the vehicle cannot move.
If the vehicle is not secured to prevent
uncontrolled vehicle movement, it could
roll and cause serious personal injury or
damage to the vehicle.
Failure to maintain the specified torque values or to replace worn parts
can cause component system failure, possibly resulting in an accident.
Improperly tightened (loose) suspension U-bolts can lead to unsafe vehicle
conditions, including hard steering, axle misalignment, spring breakage
or abnormal tyre wear. (See the Fastener Torque Tables pages 284 for
proper torque specifications.)
REAR SUSPENSION FASTENERS
To maintain the performance of the air suspension, check fastener torque
values after the first 10,000km of service and every 40,000km thereafter.
Torque recommendations apply to fasteners supplied and installed by
Kenworth. The values listed in the tables on pages 290 are for cadmium-
plated or phosphate and oil fasteners only. See the Kenworth Maintenance
Manual for complete details on Suspension Maintenance.
U-bolts are difficult to tighten unless you have the right equipment. If you
cannot tighten them correctly yourself, be sure to have them checked and
tightened regularly by an authorised technician.