7. Lubricate the outer bearing cone with the same lubricant as
will be used in the hub and install it into the hub assembly (see
Figure 6).
5. REASSEMBLY – PRESET WHEEL HUBS (CONTINUED)
Consolidated Metco, Inc. 15
33
FIGURE 35
8. Check to be certain the seal is not cocked and that
the seal inner diameter and the inner bearing turn
freely.
9. Lubricate the inner diameter of the seal with a light
film of the same lubricant as will be used in the hub.
10. Turn the hub over, and place it seal end down. For
all drive and trailer hubs, install a bearing spacer. If
the spacer has a tapered end, it should face
towards the outboard end of the hub (see figure
36).
34
Installing the Spacer
FIGURE 36
11. Lubricate the outer bearing cone with the same
lubricant as will be used in the hub and install it into
the hub assembly (see figure 37).
35
Installing the Outer Bearing Cone
FIGURE 37
Failure to lubricate the inner diameter of the seal, and the seal
journal, may result in premature seal failure.
106811b
OUTRUNNER OR
STEMCO ENDEAVOR
SEAL
SKF SCOTSEAL PLUS XL
105748a
105749a
Consolidated Metco, Inc.15 Consolidated Metco, Inc.15
Figure 6
Reinstallation
Never support the hub on the spindle with just the inner
bearing and seal.This can damage the seal by cocking the
seal in the seal bore and can lead to seal failure and loss of a
wheel, creating a risk of serious bodily injury.
1. Clean the spindle to remove any lubricant, corrosion
prevention coating, foreign material, or surface rust that may
be present.
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 inner diameter of the seal with a light lm of
the same type of lubricant as will be used in the hub.
Failure to lubricate the inner diameter of the seal may result
in premature seal failure.
4. For hubs equipped with the integrated PreSet Plus spindle
nut, skip to next section titled PreSet Plus Spindle Nut
Installation. For traditional PreSet hubs, mount the hub
assembly onto the axle spindle with a smooth, rm 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.
a. One-Piece Spindle Nut System. For one-piece spindle nut
systems, torque the nut to a minimum of 300 ft-lbs. DO NOT
BACK OFFTHE SPINDLE NUT. Engage any locking device that
is part of the spindle nut system. If the locking device cannot
be engaged when the nut is at 300 ft-lbs., ADVANCE THE NUT
UNTIL ENGAGEMENTTAKES PLACE AND THE NUT IS LOCKED.
b. 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.
DO NOT BACK OFFTHE SPINDLE NUT. Advance the inner nut as
necessary to install the locking ring. Install the outer nut with
200 ft-lbs. of torque. Be sure to engage any secondary locking
device.
PreSet Plus Spindle Nut Installation
1. Seat the at washer into the back of the spindle nut (see
Figure 7).
Figure 7
2. Position the spindle nut and washer against the outer
bearing (see Figure 8).
Figure 8
3. Install the spiral snap ring into the snap ring groove in the
hub. Make sure that the snap ring is fully seated into the groove
in the hub (see Figures 9 & 10)
Figure 9
Figure 10
4. If present, remove the red locking snap ring from the spindle
nut.Verify that the bearing spacer is in proper alignment. Align
the key or at on the washer with the keyway or at on the
spindle as the hub is placed onto the spindle. Use a smooth
rm motion and place the hub onto the spindle. When the
threads on the nut engage the threads on the spindle, rotate
the nut in a clockwise direction to fully engage the threads.
5. Torque the spindle nut to the following torque values:
a. Steer Hub – Torque the spindle nut to 300 ft-lbs. while
rotating the hub. DO NOT BACK OFFTHE SPINDLE NUT.
b. Drive or Trailer hub –Torque the spindle nut to 500 ft-lbs.
while rotating the hub. DO NOT BACK OFFTHE SPINDLE NUT.
6. Visually examine the three holes in the face of the spindle
nut. One of the holes will line up with the holes in the inner
washer. Install the tab of the red locking snap ring through the
hole in the nut and washer that are aligned. Spread the locking
ring, push it over the spindle nut and into the machined
grooves in the spindle nut. Use caution not to bend the locking
ring permanently.
7. Rotate the hub assembly checking for smooth and free
rotation.
Verify the hub will rotate by hand before placing it in service. Some
drag is normal for a new seal, but excessive drag or roughness may
indicate excessive bearing preload which could result in premature
bearing failure. An incorrect combination of parts or the use of one
or more non-PreSet parts may cause this condition.
Lubrication
1. 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 the proper hubcap for the type of lubricant being used.
Failure to ll the hub with the correct amount of lubricant
can cause premature failure of the PreSet hub assembly,
which could result in a wheel loss and possible death or
serious injury.
2. Drive Hub - Drive hubs can be lubricated by installing one
quart of oil through the ll plug in the barrel of the hub. If no
ll plug is present, the drive hub can be lubricated by lifting
the opposite side of the axle 8 inches to allow the lubricant to
run down the axle housing and into the hub assembly. Elevate
the axle for two minutes to allow the lubricant time to ll the
hub. Repeat the process for the opposite side of the vehicle. The
rear axle carrier should be lled to the proper level to ensure
adequate lubricant is available to ll the entire hub. Rell the
carrier to the proper level after this procedure is completed.
3. Steer and Trailer hubs lubricated with oil -
a. Fill the hub through the hubcap center hole to the“oil level”
mark on the face of the cap (see Figure 11).
7. L
UBRICATION
Consolidated Metco, Inc. 21
Lub rication
DRIVE HUB LUBRICATION
Drive hubs can be lubricated by installing one quart of
oil through the fill plug in the barrel of the hub.
If no fill plug is present, the drive hub can be lubricated
by lifting the opposite side of the axle 8" to allow the
lubricant to run down the axle housing and into the hub
assembly. Elevate the axle for two minutes to allow the
lubricant time to fill the hub. Repeat the process for the
opposite side of the vehicle. The rear axle carrier should
be filled to the proper level to ensure adequate lubricant
is available to fill the entire hub. Refill the carrier to the
proper level after this procedure is completed.
STEER AND TRAILER HUBS WITH OIL
LUBRICANT
1. Fill the hub through the hubcap or the fill hole with
oil. It may be necessary to add lubricant more than
once to adequately fill the hub (see figure 46).
44
Filling the Hub with Oil
FIGURE 46
2. Be certain the hubcap is properly filled to the “oil
level” mark on the face of the cap (see figure 47).
Allow the initial fill amount to settle for 10 minutes.
Repeat the fill procedure until the oil is at the fill line
on the hubcap.
45
Fill to “Oil Level Line”
FIGURE 47
3. Be sure to put the fill hole plug back into the hubcap
and that the vent is working properly.
TRAILER HUBS WITH SEMI-FLUID
GREASE LUBRICANT
1. Remove the fill hole plug.
2. Loosen the hubcap bolts to allow air to escape
while the hub is filling.
3. Fill the hub with the OEM recommended amount of
room temperature (60°F minimum) semi-fluid
grease through the fill hole in the hub (see figure
48).
For proper fill levels using semi-fluid grease, see
the following chart.
The proper installation torque for the fill plug is 20-25 ft-lbs.
Only use oil approved by the seal manufacturer (see approved list
from the seal manufacturer or on www.conmet.com).
Some hubs are provided with a fill hole, located in the barrel and
between the bearings for adding lubricant.
105753a
If you are using semi-fluid grease in trailer applications, special
procedures must be followed as outlined in the “Semi-Fluid
Grease Lubricant” section.
Failure to fill and maintain the hub with the correct amount of
semi-fluid grease may cause premature failure of the wheel hub
system, bearing failure and possible loss of the wheel.
105754a
FULL
LINE
Consolidated Metco, Inc.21 Consolidated Metco, Inc.21
Figure 11
b. Allow oil to settle for ten minutes. Repeat the ll procedure
until the oil is at the ll line.
See ConMet service manual recommendations for trailer hubs
lubricated with semi-uid grease. ConMet service manuals can
be found online at www.conmet.com.
