Group 26, Steer Axle
SM 765, Dec ’06 Steering Axle Overhaul • 26-4-3
Parts Inspection
1. Clean all bearings, cups, seals, pins, and other parts
in an approved cleaning fluid.
2. Inspect all parts for scratches, chips and wear. Check
the steering arms of the knuckles to be sure they are
not bent or twisted. Check all threaded parts for dam-
age.
3. Replace all parts which show damage.
4. If parts are to be left exposed, coat all mating sur-
faces of parts with a light coating of engine oil.
Steer Axle Reassembly
Recommended greasing procedure:
a. Use Grade No. 2 EP multi-purpose grease, Clark
MS-107 or equivalent.
b. Pack all tapered roller bearings with grease
before assembly.
c. Pack knuckle pin (bearing) seals with grease
before assembly.
d. Fill steer link sockets with grease through grease
fittings after axle is assembled.
1. Install the upper and lower knuckle bearing cups into
the knuckle housing bore. Tap into place with a brass
drift pin or equivalent.
IMP
RTANT
Make sure that bearing cup is fully seated
against the shoulder in bore. There must be
no gap left between cup and the shoulder in
the bore at assembly.
2. Apply grease to upper and lower knuckle bearings
and install bearings, grease seals, and washers to
bores of knuckle.
3. Set the retainer pin into the king pin and slide the
king pin into the steer axle/knuckle bore.
IMP
RTANT
Make sure that retainer pin enters the hole in
the underside of the axle
4. Reset the kingpin castellated nut to the top of the
kingpin. Torque nut to 50-60 N⋅m (36.5-44 ft-lb).
5. Rotate the steer knuckle three times through its full
range of movement. Check to be sure that it is free to
rotate in the bearings without binding.
6. Loosen the kingpin nut and retorque the nut to 30-
35N⋅m (22.2-25.5 ft-lb).
7. Advance the nut to the next castellated slot and
lock the nut into position with a new cotterpin.
Bendcotterpin tabs over.
8. Replace steering link pin and snap ring to join the
cylinder rod to the steering link and knuckle.
9. Reinstall grease fitting in knuckle housing and lubri-
cate with recommended grease.
Kingpin castel-
lated Nut
Kingpin
Retainer Pin
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