33–00 Safety Precautions
Safety Precautions in this section apply to all
procedures within this group.
DANGER
When working on the vehicle, shut down the en-
gine or motor, set the parking brake, and chock
the tires. Before working under the vehicle, always
place jack stands under the frame rails to ensure
the vehicle cannot drop. Failure to follow these
steps could result in serious personal injury or
death.
33–01 Knuckle Pin Lubrication
NOTICE
Use regulated pressure when lubricating the
knuckle assemblies, otherwise damage could re-
sult to the knuckle caps.
Detroit
™
Axles
1. Park the vehicle on a level surface, shut down
the engine, and set the parking brake. Chock the
tires. When lubricating upper and lower knuckle
assemblies, do not raise the front axle.
2. Wipe the fittings clean.
3. Apply multipurpose chassis grease, NLGI Grade
1 (6% 12-hydroxy lithium stearate grease) or
NLGI Grade 2 (8% 12-hydroxy lithium stearate
grease), until new grease is seen at the junctions
of the axle beam and knuckles. For locations of
grease fittings, see
Fig. 1; for grease exit points,
see Fig. 2.
Dana Spicer Axles
Park the vehicle on a level surface, apply the parking
brakes, and chock the tires. When lubricating upper
and lower knuckle assemblies, do not raise the front
axle. Wipe the fittings clean, then apply multipurpose
chassis grease, NLGI Grade 1 (6% 12-hydroxy
lithium stearate grease) or NLGI Grade 2 (8% 12-
hydroxy lithium stearate grease), until new grease is
seen at the junctions of the axle beam and knuckles.
See
Fig. 3. Knuckle pins without grease fittings are
permanently lubricated.
Meritor Axles
Park the vehicle on a level surface, apply the parking
brakes, and chock the tires. When lubricating knuckle
pin bushings, do not raise the front axle. Wipe the
lube fittings clean, and apply multipurpose chassis
06/07/2012 f330272
A
B
1
1
A Upper View, LH Side B Lower View, LH Side
1. Grease Fitting
Fig. 1, Grease Fittings, Detroit Axles
09/13/2012 f330275
Fig. 2, Knuckle Pin Grease Exit Points, Detroit Axles
Front Axle 33
108SD and 114SD Maintenance Manual, May 2017 33/1
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