Specifications

Preventive Maintenance Front Axle and Suspension
Medium Duty
(R05/09) Y53-6008A – 241 –
• 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 lubri-
cant.
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 short-
ened if necessary.
Suspension Lubrication
Each spring anchor pin has a grease fitting. Pressure lubri-
cate 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).
• 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.
Front Axle
KINGPIN (TOP)
KINGPIN
(BOTTOM)
00445