25
ConMet
Pr
eSet Wheel Hubs – Reinstallation
5. PreSet Wheel Hubs – Reinstallation
INSTALLING THE PreSet
WHEEL HUB ASSEMBLY
Spindle Preparation
1. Clean the spindle to remove
any lubricant, corrosion
prevention coating, foreign
material, or surface rust that
may be present. Be sure to
clean the full length of the seal
journal.
2. Lubricate the bearing journals
on the spindle, or the inside
diameter of the bearing cones
with Grade 2 grease or the
lubricant that will be used in the
wheel end. Do not coat the seal
journal on the spindle.
3. Lubricate the inside diameter of
the seal with the same lubricant
that will be used in the wheel
end.
Failure to apply lubricant to the bearing journals
will result in fretting corrosion, which may
result in difficulty removing the bearing. Never
support the hub on the spindle with just the inner
bearing and seal. This can damage the seal and
cause premature failure, i.e., by cocking the seal
in the bore.
CAUTION
!
Mounting the Hub
4. Mount the hub assembly onto
the axle spindle with a smooth,
firm motion while holding the
outer bearing in place. Use
care to maintain alignment
between the bearing cones,
spacer, and spindle and to
avoid seal damage (see figure
59).
22
106831a
Mounting the Assembly
FIGURE 59
Spindle Nut Torque
5. One-Piece Spindle Nut System
(Pro-Torq® and Axilok®)
-
If a one-piece spindle nut
system is being used, torque
the nut to a minimum of 300
ft-lbs (150 ft-lbs for PreSet
FC medium duty steer). Do
not back off the spindle nut.
Advance as necessary to
engage any locking device.
6. Double Nut or Jam Nut System
-
If a double nut or jam nut
system is being used, torque
the inner nut to 300 ft-lbs (150
ft-lbs for PreSet FC medium
duty steer). Do not back off
the spindle nut. Advance the
inner nut as necessary to
install the locking ring. Install
the outer nut with 200 ft-lbs
(100 ft.-lbs. for PreSet FC)
of torque. Be sure to engage
any locking device.
ConMet does not recommend a one-piece
"castellated" type nut system for use with
PreSet hubs.
NOTE
The hubcap bolt holes must be free of debris, such
as silicone gasket sealer to ensure the bolts will
tighten properly to avoid leaks. Silicone trapped
in the hubcap screw holes can create hydraulic
pressures during hubcap screw installation,
leading to premature hub failure through the
hubcap holes. The vent should also be clean and
free of debris. Remove any burrs or sharp edges.
Always use new gaskets.
NOTE
7. Install the hub cap or drive axle
with a new gasket. Torque the
hub cap bolts in a star pattern
to 12 to 18 ft-lbs. Torque the
drive axle bolts or nuts per
the drive axle manufacturer’s
recommendation.
Use SAE Grade 5 bolts or stronger. Do not use star
washers. Use only flat washers or split washers.
NOTE