Peterbilt Medium Duty Trucks Operator's Manual after 1-07

Preventive Maintenance
Maintenance Schedule and Lubrication
Oil Reservoirs
For oil reservoirs with side filler plugs (transmissions, axles,
steering gear boxes, transfer cases, etc.), the oil must be
level with the filler opening.
NOTE: Use care when checking the oil level with a
finger. Just because you can reach the oil level with
a finger, does not mean the oil level is correct.
Lubrication Chart
The following lubrication specifications (see Table 4 on
page 136) are for an ambient operating temperature range of
–15 to 100°F (–26 to 38°C). For extreme temperature operations,
consult the component manufacturer's manuals.
Medium Duty (R10/06) Y53-6008 – 135 –