Kenworth T410, Руководство водителя

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CAT: 8612 November 2019 Page 283
PREVENTIVE MAINTENANCE
VISUAL INSPECTION
• For all vehicles mandatory maintenance procedures include re-
tightening all U-bolts and inspecting the suspension for loose
fasteners, abnormal wear or damage. However, even with proper
maintenance, the service life of leaf springs is affected by many
factors, including fatigue, vehicle gross weight, type of load, road
conditions and vehicle speed.
• Check for cracks, wear marks, splits or other defects on the surface
of the spring. Defective parts must be replaced. Because repaired
springs cannot be fully restored to their original service life, replace
the complete assembly if cracks or other defects are detected.
• Visually inspect shock absorbers and rubber bushings. See the
Electronic Customised Maintenance Manual for further information
on servicing the front suspension.
U-BOLT TENSION FOR FRONT AND REAR
AXLES
It is important that U-bolts remain tight. Severe use of your vehicle will
cause them to loosen faster. All vehicles need to have their U-bolts checked
and tightened regularly. Be sure someone with the proper training and the
right tools checks and tightens the U-bolts on your Kenworth.
New springs can ‘settle in’ after service relieving the tension on the U-bolts.
Loose U-bolts can cause leaf spring breakage, axle misalignment, hard
steering and abnormal tyre wear.
Do not operate the vehicle if the U-bolts are not properly tightened. Loose
U-bolts will cause the axle to not be properly secured to the suspension,
which could cause loss of vehicle control and an accident. Loose U-bolts
can also cause uneven tyre wear and poor alignment.
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 Kenworth dealer.
For on-highway vehicles, tighten U-bolts after the first service (10,000km),
and then every 40,000km thereafter. For off-highway vehicles, tighten
U-bolts after the first day or two of operation, then check weekly. Re-torque
the front spring pinch bolts and shackle pinch bolts. See the Electronic
Customised Maintenance Manual for torque values.