Section 13
Section 13
Steer AxleSteer Axle
Introduction.Introduction. The steer axle is mounted to theThe steer axle is mounted to the
frame with two frame with two pivot pins. pivot pins. The pivot pins are The pivot pins are anan
integral part integral part of the of the axle. axle. Axle pivot Axle pivot bearings arebearings are
installed inside the front and rear steer axle pivotinstalled inside the front and rear steer axle pivot
blocks. blocks. All routine All routine maintenance can maintenance can be accom-be accom-
plished with the steer axle connected to the frame.plished with the steer axle connected to the frame.
Lubrication.Lubrication. Refer to theRefer to the LubricationLubricationsection insection in
thethe AppendicesAppendicesfor information on lubricating thefor information on lubricating the
steer axle.steer axle.
Before checking or servicingBefore checking or servicing
the steer axle, park on level ground, apply thethe steer axle, park on level ground, apply the
parking brake, block the wheels in bothparking brake, block the wheels in both
directions, shut down the engine, and Lockdirections, shut down the engine, and Lock
Out & Tag Out the truck.Out & Tag Out the truck.
Mounting Bolts CheckMounting Bolts Check(Illustration 13-1)(Illustration 13-1).. TheThe
mounting bolts of the steer axle should bemounting bolts of the steer axle should be
checked for tightness periodically (refer to thechecked for tightness periodically (refer to the
Preventive MaintenancePreventive Maintenancechart in thechart in the Appen-Appen-
dicesdices for steer axle mounting bolts inspectionfor steer axle mounting bolts inspection
interval). interval). If the If the mounting bolts mounting bolts require tightening,require tightening,
torque bolts to 150 - 165 ft-lbs (200 - 225 Ntorque bolts to 150 - 165 ft-lbs (200 - 225 N
⋅⋅
m)m)
[405 - 450 ft-lbs (550 - 610 N[405 - 450 ft-lbs (550 - 610 N⋅⋅m) TXH400L].m) TXH400L].
Steer Cylinder Mounting BoltsSteer Cylinder Mounting Bolts(Illustration 13-1)(Illustration 13-1)..
The steer cylinder mounting bolts should beThe steer cylinder mounting bolts should be
checked for tightness periodically (refer to thechecked for tightness periodically (refer to the
Preventive MaintenancePreventive Maintenancechart in thechart in the Appen-Appen-
dicesdices for steer cylinder mounting bolts inspectionfor steer cylinder mounting bolts inspection
interval). interval). If there is If there is any evidence of any evidence of threading orthreading or
movement of the steer cylinder, then remove themovement of the steer cylinder, then remove the
mounting bolts, clean bolts, apply Loctitemounting bolts, clean bolts, apply Loctite
to theto the
threads of the bolts and torque bolts to 460 ft-lbsthreads of the bolts and torque bolts to 460 ft-lbs
(625 N(625 N
⋅⋅
m) [900 ft-lbs (1,225 Nm) [900 ft-lbs (1,225 N
⋅⋅
m) TXH400L].m) TXH400L].
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