Peterbilt Medium Duty Trucks Operator's Manual after 1-07
Peterbilt Medium Duty Trucks Operator's Manual after 1-07
Peterbilt Medium Duty Trucks Operator's Manual after 1-07
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Preventive Maintenance<br />
It is important that U–bolts remain tight. Severe use of your<br />
vehicle can cause them to loosen faster. But all vehicles need<br />
to have their U–bolts checked and tightened regularly. Be<br />
sure someone with the proper training and the right tools<br />
checks and tightens the U–bolts on your <strong>Medium</strong> <strong>Duty</strong>.<br />
New springs “settle-in” <strong>after</strong> the vehicle's initial service, causing<br />
the U–bolts to become loose. After the first 500 miles<br />
(800 km) of operation, inspect the suspension periodically, as<br />
noted below:<br />
• Visually check for loose or missing fasteners, cracks in<br />
hanger or axle connection brackets.<br />
• Check that springs are centered in hangers and in good<br />
condition.<br />
• Check for cracks, wear marks, splits, or other defects on<br />
the surface of the spring.<br />
• Replace defective parts. Because repaired springs cannot<br />
be fully restored to their original service life, replace<br />
the complete assembly if cracks or other defects are<br />
detected.<br />
• After replacement of any part or discovery of loose components,<br />
check the torque of all fasteners.<br />
Rear Axle Lubrication<br />
Rear Axle and Suspension<br />
• Check oil level with the vehicle parked on level ground<br />
and the fluid warm. The level should be even with the<br />
bottom of the filler hole.<br />
CAUTION: Do not mix lubricants of different<br />
grades; although, mixing different brands of the<br />
same grade lubricant (meeting MIL–L–2105–C),<br />
is acceptable. Lubricants of different grades are<br />
not compatible and could damage the axle.<br />
NOTE: In all cases, the lubricant supplier assumes<br />
full responsibility for the performance of their product,<br />
and for product and patent liability.<br />
Initial Change: Change lubricant in new or rebuilt axle<br />
assemblies within the first 3,000 to 5,000 miles (4800 to 8000<br />
km). For recommended types and brands of lubricants, contact<br />
your <strong>Peterbilt</strong> Dealer or Authorized Service Center. See<br />
the <strong>Medium</strong> <strong>Duty</strong> Maintenance <strong>Manual</strong> and the axle manufacturer's<br />
Service <strong>Manual</strong> for further information on servicing<br />
drive axles.<br />
<strong>Medium</strong> <strong>Duty</strong> (R10/06) Y53-6008 – 213 –
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