Medium Duty Operator's Manual - Peterbilt Motors Company

Preventive Maintenance
• Thoroughly clean hubs and bearings with solvent and a
stiff bristle brush, then dry and inspect components for
wear or damage. Re-lubricate with approved axle lubricant.
Front Axle and Suspension
KINGPIN (TOP)
Kingpin Lubrication
• Lubricate with approved lubricant. Lubricate knuckle
thrust bearings, knuckle pins, and tie rod ends. See
Table 1, “Recommended Maintenance Intervals,”
Page 150. Lack of lubrication causes premature wear
and hard steering. Lubrication schedule may be shortened
if necessary.
Suspension Lubrication
Each spring anchor pin has a grease fitting. Pressure lubricate
spring pins according to Table 1, “Recommended
Maintenance Intervals,” Page 150, using EP chassis lube
with 12-Hydroxy Lithium Stearate Base NLGI-2 with 3%
molybdenum additive (e.g. Mobil-grease EP or equal).
Front Axle
KINGPIN
(BOTTOM)
00445
• At regular intervals, the spring leaves may be lubricated
with a rust-inhibiting oil applied with a spray gun or
brush.
• Lubricate all spring pins until grease flows out of both
ends of the bushing. Look for signs of rust or water in the
flushed grease. If a pin will not accept grease, it should
be removed, cleaned, and inspected.
Medium Duty (R05/09) Y53-6008A – 241 –