Conmet Conventional User manual

SERVICE MANUAL
For Steer, Drive, andTrailer Hub Assemblies
Conventional
Hub Assemblies
PreSet Plus®
Hub Assemblies
Hub & Rotor
Assemblies
PreSet®
Hub Assemblies

About this Manual
Before You Begin
-Read this manual carefully,
providing extra attention to its
explanations and instructions.
-To ensure safe, continuous,
trouble-free operation,
understand your wheel
hub system, and keep
all components in proper
operating condition.
-Pay particular attention to
all NOTES, CAUTIONS,
WARNINGS, and DANGERS
to avoid the risk of personal
injury or property damage,
and realize these statements
are not exhaustive. ConMet®
cannot possibly know or
evaluate all conceivable
methods in which service may
be performed or the possibly
hazardous consequences of
each method. Accordingly,
those who use a procedure
not recommended by ConMet
must rst satisfy themselves
that neither their safety nor
the safety of the product will
be jeopardized by the service
method selected.
-Use only ConMet approved
replacement parts. Do not
attempt to use damaged
parts.
-Follow your company’s
maintenance and service,
installation, and diagnostics
guidelines.
-Use special tools when
required to help avoid serious
personal injury and damage
to components
Color Coding
Throughout this manual we will use
the following colors to help identify
specic areas that reference
Conventional, PreSet®, and PreSet
Plus® ConMet hubs.
Conventional
PreSet
PreSet Plus
If a color is not specied, then you
can conclude the information is
mutual for all hub assemblies.
Hazard Alert Messages
A Danger alert indicates a hazardous situation
which if not avoided, will result in death or
serious injury.
DANGER
!
A Warning alert indicates a hazardous situation
which if not avoided, could result in death or
serious injury.
WARNING
!
A Caution alert indicates a hazardous situation
which if not avoided, could result in minor or
moderate injury.
CAUTION
!
A note includes additional information that may
assist the technician in service procedures.
NOTE
Additional Maintenance
and Service Information
On the Web
Visit conmet.com to access
ConMet’s product, sales, service
and maintenance literature.
ConMet Customer Service
Call ConMet’s Customer Service at
1-800-547-9473.
ConMet Decals
The following decals are available
upon request:
Decal Name PreSet Part
Number
PreSet Plus
Part Number
Disc Wheel
Installation
Procedures
103282 103282
Hubs
Lubricated
with Oil
106873 10038167
Hubs
Lubricated
with Semi-
Fluid Grease
107383 10038168
ConMet, PreSet, and PreSet Plus are registered trademarks of Consolidated Metco Inc. © Consolidated Metco Inc. 2017, All Rights Reserved.

Table of Contents
1. INTRODUCTION ..........................................................................................................................................................................................1
Conventional Hubs ............................................................................................................................................................................1
PreSet Hub Assemblies.....................................................................................................................................................................1
PreSet Plus Hub Assemblies.............................................................................................................................................................1
2. INSPECTION................................................................................................................................................................................................2
HAZARD ALERT MESSAGES .....................................................................................................................................................................2
WHEEL END INSPECTION GENERAL GUIDELINES..................................................................................................................................2
Driver Pre-Trip Visual Inspection.......................................................................................................................................................2
In Route Inspections..........................................................................................................................................................................2
Service Interval..................................................................................................................................................................................3
Lubrication Analysis ..........................................................................................................................................................................3
3. IDENTIFICATION .........................................................................................................................................................................................4
WHEEL MOUNTING SYSTEMS ..................................................................................................................................................................4
Hub Pilot Wheel Mounting .................................................................................................................................................................4
Ball Seat Wheel Mounting System.....................................................................................................................................................4
IDENTIFYING CONMET HUB ASSEMBLIES...............................................................................................................................................4
Vehicle Identication Number (VIN) ..................................................................................................................................................4
Casting Number ................................................................................................................................................................................4
Machining Number............................................................................................................................................................................4
Final Hub Assembly Number.............................................................................................................................................................5
Julian Date.........................................................................................................................................................................................5
Conventional Wheel Hubs ...........................................................................................................................................................5
PreSet Wheel Hubs......................................................................................................................................................................5
PreSet Plus Wheel Hubs ..............................................................................................................................................................5
4. CONVENTIONAL WHEEL HUBS ................................................................................................................................................................6
HUB REMOVAL AND DISASSEMBLY ........................................................................................................................................................6
COMPONENT INSPECTION AND REPLACEMENT HAZARD ALERT MESSAGES....................................................................................7
CLEAN AND DRY COMPONENTS .............................................................................................................................................................7
Worn or Damaged Components .......................................................................................................................................................7
Hub and Component Cleaning .........................................................................................................................................................7
INSPECTING BEARING CUPS AND CONES..............................................................................................................................................8
REMOVING CUPS IN ALUMINUM HUBS...................................................................................................................................................8
REMOVING CUPS IN IRON HUBS .............................................................................................................................................................8
INSTALLING A NEW CUP IN ALUMINUM HUBS .......................................................................................................................................8
INSTALLING A NEW CUP IN IRON HUBS .................................................................................................................................................8
WHEEL STUDS ...........................................................................................................................................................................................9
STUD REMOVAL.........................................................................................................................................................................................9
STUD REPLACEMENT................................................................................................................................................................................9
HUB, DRUM AND WHEEL INSPECTION....................................................................................................................................................9
ABS TONE RING INSPECTION (AS APPLICABLE) ....................................................................................................................................9
REMOVAL AND INSTALLATION OF MACHINED ABS TONE RING ........................................................................................................10
REMOVAL AND INSTALLATION OF STAMPED STEEL ABS TONE RING ...............................................................................................10
REMOVAL AND INSTALLATION OF BOLT ON ABS TONE RINGS..........................................................................................................10
REASSEMBLY...........................................................................................................................................................................................11
CONVENTIONAL WHEEL HUBS ASSEMBLY...........................................................................................................................................11
REINSTALLATION ....................................................................................................................................................................................12
INSTALLING CONMET CONVENTIONAL WHEEL HUBS.........................................................................................................................12
Spindle Preparation.........................................................................................................................................................................12
Conventional Hub Installation..........................................................................................................................................................12
Manual Bearing Adjustment Procedure (reference TMC RP618) ...................................................................................................13
SERVICE PARTS .......................................................................................................................................................................................14
5. PRESET WHEEL HUBS ............................................................................................................................................................................17
HUB REMOVAL AND DISASSEMBLY ......................................................................................................................................................17
COMPONENT INSPECTION AND REPLACEMENT HAZARD ALERT MESSAGES..................................................................................18
CLEAN AND DRY COMPONENTS ...........................................................................................................................................................19
Worn or Damaged Components .....................................................................................................................................................19
Hub and Component Cleaning .......................................................................................................................................................19
INSPECTING BEARING CUPS AND CONES AND BEARING SPACER ...................................................................................................19
REMOVING CUPS IN ALUMINUM HUBS.................................................................................................................................................19
REMOVING CUPS IN IRON HUBS ...........................................................................................................................................................20
INSTALLING A NEW CUP IN ALUMINUM HUBS .....................................................................................................................................20
INSTALLING A NEW CUP IN IRON HUBS ...............................................................................................................................................20
WHEEL STUDS .........................................................................................................................................................................................20
STUD REMOVAL.......................................................................................................................................................................................20
STUD REPLACEMENT..............................................................................................................................................................................20
HUB, DRUM AND WHEEL INSPECTION..................................................................................................................................................21
ABS TONE RING INSPECTION (AS APPLICABLE) ..................................................................................................................................21
REMOVAL AND INSTALLATION OF ABS TONE RING ............................................................................................................................21
REMOVAL AND INSTALLATION OF STAMPED STEEL ABS TONE RING ...............................................................................................21
REMOVAL AND INSTALLATION OF BOLT ON ABS TONE RINGS (FOR DISC BRAKES).......................................................................22
REASSEMBLY...........................................................................................................................................................................................23
PRESET WHEEL HUBS.............................................................................................................................................................................23

Table of Contents
REINSTALLATION ....................................................................................................................................................................................25
INSTALLING THE PRESET WHEEL HUB ASSEMBLY ..............................................................................................................................25
Spindle Preparation.........................................................................................................................................................................25
Mounting the Hub............................................................................................................................................................................25
Spindle Nut Torque .........................................................................................................................................................................25
SERVICE PARTS .......................................................................................................................................................................................26
6. PRESET PLUS WHEEL HUBS..................................................................................................................................................................29
HUB REMOVAL AND DISASSEMBLY ......................................................................................................................................................29
COMPONENT INSPECTION AND REPLACEMENT HAZARD ALERT MESSAGES..................................................................................31
CLEAN AND DRY COMPONENTS ...........................................................................................................................................................31
Worn or Damaged Components .....................................................................................................................................................31
Hub and Component Cleaning .......................................................................................................................................................31
INSPECTING BEARING CUPS AND CONES AND BEARING SPACER ...................................................................................................31
REMOVING CUPS IN ALUMINUM HUBS.................................................................................................................................................32
REMOVING CUPS IN IRON HUBS ...........................................................................................................................................................32
INSTALLING A NEW CUP IN ALUMINUM HUBS .....................................................................................................................................32
INSTALLING A NEW CUP IN IRON HUBS ...............................................................................................................................................32
WHEEL STUDS .........................................................................................................................................................................................32
STUD REMOVAL.......................................................................................................................................................................................33
STUD REPLACEMENT..............................................................................................................................................................................33
HUB, DRUM AND WHEEL INSPECTION..................................................................................................................................................33
ABS TONE RING INSPECTION (AS APPLICABLE) ..................................................................................................................................33
REMOVAL AND INSTALLATION OF ABS TONE RING ............................................................................................................................33
REMOVAL AND INSTALLATION OF STAMPED STEEL ABS TONE RING ...............................................................................................34
REMOVAL AND INSTALLATION OF BOLT ON ABS TONE RINGS (FOR DISC BRAKES).......................................................................34
REASSEMBLY...........................................................................................................................................................................................35
PRESET PLUS WHEEL HUBS...................................................................................................................................................................35
Spindle Nut and Spiral Snap Ring Reassembly..............................................................................................................................36
REINSTALLATION ....................................................................................................................................................................................37
INSTALLING THE PRESET PLUS WHEEL HUB ASSEMBLY ....................................................................................................................37
SERVICE PARTS .......................................................................................................................................................................................38
7. LUBRICATION ...........................................................................................................................................................................................41
DRIVE HUB LUBRICATION ......................................................................................................................................................................41
STEER AND TRAILER HUBS WITH OIL LUBRICANT...............................................................................................................................41
TRAILER HUBS WITH SEMI-FLUID GREASE LUBRICANT ......................................................................................................................41
8. BRAKE AND WHEEL INSTALLATION......................................................................................................................................................43
CALIPER INSTALLATION .........................................................................................................................................................................43
WHEEL INSTALLATION............................................................................................................................................................................43
HUB PILOT WHEEL MOUNTING SYSTEM ...............................................................................................................................................43
BALL SEAT WHEEL MOUNTING SYSTEM ...............................................................................................................................................44
9. WHEEL HUB AND ROTOR........................................................................................................................................................................46
WHEEL HUBS WITH CONMET DISC BRAKE ROTORS ...........................................................................................................................46
Part Number Identication...............................................................................................................................................................46
Rotor Identication ..........................................................................................................................................................................46
10. HUB AND ROTOR INSPECTION...............................................................................................................................................................47
HAZARD ALERT MESSAGES ...................................................................................................................................................................47
DISC BRAKE ROTOR INSPECTION .........................................................................................................................................................47
Heat Checks....................................................................................................................................................................................47
Cracks .............................................................................................................................................................................................47
Deep Grooves or Scoring................................................................................................................................................................48
Blue Marks or Bands .......................................................................................................................................................................48
Polished Rotors ...............................................................................................................................................................................48
Martensite Spotted Rotors...............................................................................................................................................................48
Grease-Stained Rotors ....................................................................................................................................................................48
Lining Transfer.................................................................................................................................................................................49
Clogged or Restricted Vent Holes...................................................................................................................................................49
Rotor Runout....................................................................................................................................................................................49
Rotor Thickness...............................................................................................................................................................................49
Rotor Resurfacing............................................................................................................................................................................50
11. HUB AND ROTOR REMOVAL AND DISC REPLACEMENT ....................................................................................................................51
HAZARD ALERT MESSAGES ...................................................................................................................................................................51
HUB AND ROTOR REMOVAL ..................................................................................................................................................................51
DISC BRAKE ROTOR REPLACEMENT.....................................................................................................................................................51
PART IDENTIFICATION ............................................................................................................................................................................51
12. DISC BRAKE ROTOR REPLACEMENT ...................................................................................................................................................52
ROTOR REPLACEMENT PROCEDURES..................................................................................................................................................52
ConMet Flat Rotors..........................................................................................................................................................................52
ConMet Hat Rotor............................................................................................................................................................................62
ConMet U-Shaped Rotors ...............................................................................................................................................................63
WHEEL HUB AND ROTOR – SERVICE PARTS LIST ..............................................................................................................................67
WHEEL TORQUE SPECIFICATIONS........................................................................................................................................................68

Conventional Hubs
ConMet conventional hubs feature
precision-machined aluminum or
iron castings and are available in
steer, drive and trailer congurations.
Hubs are supplied with bearing cups
and studs installed. Bearing cones
and wheel seals are supplied by the
customer. Bearings must be adjusted
manually. See TMC RP618 for
specics of adjustment procedures.
1
106923a
ABS RING
INNER
BEARING
CONE
INNER
BEARING
CUP
OUTER
BEARING
CUP
OUTER
BEARING
CONE
LUBRICANT
FILL PLUG
OIL SEAL
Conventional Hub and Components
FIGURE 1
PreSet®Hub Assemblies
ConMet PreSet hub assemblies
include precision-machined hubs,
premium seals, specially toleranced
roller bearings and unique precision-
machined bearing spacers. This
combination eliminates the need
to manually adjust wheel end play.
These components are delivered as
a complete assembly, reducing the
potential for premature failures due
to incorrect end play settings and/or
improper installation practices.
1ConMet
1. Introduction
ConMet offers three types of wheel
hubs:
-Conventional hubs with
manually-adjusted bearings
-PreSet hub assemblies with
pre-adjusted bearings
-PreSet Plus hub assemblies
with pre-adjusted bearings
and an integrated spindle nut
PreSet Plus®Hub
Assemblies
ConMet PreSet Plus hub assemblies
feature the same PreSet technology
and include the same precision-
machined hubs, premium seals
and specially toleranced roller
bearings. However, PreSet Plus hubs
incorporate the following:
-An integrated spindle nut
that eases installation and
disassembly and protects
components during wheel end
service
-An optimized spacer
-Standard magnetic ll plug
1
106922a
ABS RING
INNER
BEARING
CONE
INNER
BEARING
CUP
OUTER
BEARING
CUP
OUTER
BEARING
CONE
INTEGRATED
NUT
LUBRICANT
FILL PLUG
OIL SEAL
SPACER
(SECTIONED)
PreSet Plus Hub and Components
FIGURE 3
1
106924a
ABS RING
INNER
BEARING
CONE
INNER
BEARING
CUP
OUTER
BEARING
CUP
OUTER
BEARING
CONE
LUBRICANT
FILL PLUG
SPACER
(SECTIONED)
OIL SEAL
PreSet Hub and Components
FIGURE 2
2
106876a
MACHINED
STEER HUB
PRESET
COMPONENTS
PRESET PLUS
COMPONENTS
Steer Hub and Components
FIGURE 4
3
106818c
MACHINED
DRIVE HUB
NOTE: CAN BE WITH
OR WITHOUT
AXLE STUDS.
PRESET
COMPONENTS
PRESET PLUS
COMPONENTS
Drive Hub and Components
FIGURE 5
4
106819c
MACHINED
TN TRAILER HUB
PRESET
COMPONENTS
PRESET PLUS
COMPONENTS
TN Trailer Hub and Components
FIGURE 6
5
106820c
MACHINED
TP TRAILER HUB
PRESET
COMPONENTS
PRESET PLUS
COMPONENTS
TP Trailer Hub and Components
FIGURE 7

2ConMet
2. Inspection
HAZARD ALERT
MESSAGES
Read and observe all hazard alert
messages in this publication. They
provide information that can help
prevent serious personal injury,
damage to components, or both.
Do not work under a vehicle supported only by
jacks. Jacks can slip and fall over. Serious personal
injury and damage to components can result.
Park the vehicle on a level surface. Block the
wheels to prevent the vehicle from moving.
Support the vehicle with safety stands.
To prevent serious eye injury, always wear
safe eye protection when you perform vehicle
maintenance or service.
WARNING
!
WHEEL END INSPECTION
GENERAL GUIDELINES
Operating temperature can be checked as the
vehicle enters the service area following a normal
run. If the hub is running in excess of 150°F above
the ambient temperature in normal operating
conditions, service is required.
NOTE
Wheel end service and
maintenance requirements will
vary based on vehicle operating
conditions, vehicle specications,
lubrication type, and vehicle
performance history. Consolidated
Metco recommends the
maintenance schedule below, in
conjunction with TMC RP631A, to
be adjusted as needed for varying
conditions.
If any item is found to be out of specication
during any of the inspection steps listed below,
place the vehicle out of service until the item can
be repaired or replaced.
CAUTION
!
Driver Pre-Trip Visual
Inspection
Visually inspect the vehicle prior
to operation. Include the following
items:
1. Check for loose, damaged, or
missing fasteners on the wheel
and hub cap or axle. Rust or
dark streaks coming from the
wheel bolts may be a sign of
improper wheel bolt torque.
2. Check for loose, damaged, or
missing hubcaps.
3. Check for lubricant leaks at:
-Hubcap
-Drive axle ange gasket
-Oil ll plug
-Oil seal leakage – indicated
by lubricant on the hub, brake
components or inside of the
wheel
4. Check lubricant condition via
hub cap window on steer and
trailer hubs. Lubricant that is
darkened, milky, shows water
in it, or has large metallic
particles in it is indicative
of contamination or a part
failure and must be replaced.
Contaminated lubricant may be
an indication of a leaking seal
that should be replaced.
5. Check for insufcient lubricant
level via hub cap window on
steer and trailer hubs. Rell
lubricant to the indicated ll
level if required.
If any of the above conditions
are found, place the vehicle out
of service until the item can be
repaired.
In Route Inspections
1. After making an in route stop,
walk around the vehicle and
inspect the hubs for any leaks
(per item 3 under Driver Pre-
Trip) and signicant differences
in temperature or excessive
temperature. If excessive
temperature is found, inspect
and repair the wheel end as
necessary. High temperatures
and high loads may cause
early bearing failure. Lubricant
viscosity should be chosen
based on expected operating
temperatures.
Preventative Maintenance
Schedule
During any routine preventative
maintenance on the vehicle or axle
(see your OEM guidelines and
associated federal regulations),
inspect the following items:
1. Check for loose, damaged, or
missing fasteners on the wheel
and hub cap. Rust or dark
streaks coming from the wheel
bolts may be a sign of improper
wheel bolt torque.
2. Check for loose, damaged, or
missing hubcaps.
3. Check for lubricant leaks at:
-Hubcap
-Drive axle ange gasket
-Oil ll plug
-Oil seal – indicated by
lubricant on the hub, brake
components or inside of the
wheel
4. Check for insufcient lubricant
level via hub cap window on
steer and trailer hubs. Rell
lubricant to the indicated ll
level if required.

3ConMet
2. Inspection (continued)
5. Check the lubricant condition.
Lubricant that is darkened,
milky, shows water in it or has
large metallic particles in it is
indicative of contamination
or a part failure and must
be replaced. Contaminated
lubricant may be an indication
of a leaking seal that should be
replaced.
-On oil lubricated hubs
equipped with a ll plug in
the hubcap or barrel of the
hub, place a magnet (or
inspect the magnetic ll plug)
in the lubricant and check
for signs of large metallic
particles picked up by the
magnet. On drive axles,
it is normal to nd a small
amount of very ne metallic
particles from the carrier
housing on the magnetic
ll plug. These particles
should be removed from the
magnet anytime the plug is
removed for inspection. If
larger particles or chunks
of metal are found, the hub
should be removed from the
spindle and the bearings and
other components should
be inspected for signs of
damage or excessive wear.
-In vehicles without a ll
plug in drive hubs inspect
the lubricant volume and
condition from the ll plug in
the axle carrier housing.
-For vehicles lubricated with
semi-uid grease, inspect
annually or every 100,000
miles. First, remove the
hubcap and inspect the
lubricant condition and
volume. Verify the lubricant
covers the ends of the
bearing rollers. If the lubricant
condition is good, add
lubricant through the ll plug
in the barrel of the hub to
cover the ends of the bearing
rollers. If the lubricant has a
dry and caked appearance,
remove the wheel end from
the vehicle and clean and
inspect all components.
Replace damaged or worn
components as necessary.
Rell hub with semi-uid
grease amount per chart on
page 42.
6. If regular scheduled
maintenance requires wheels/
axle to be lifted, perform steps
7 and 8.
7. Lift and support the axle (see
gure 8). Rotate the wheel.
Check that the wheel rotates
freely and smoothly. Listen
and feel for any signs of rough
bearing operation or vibration.
6
1003159a
FIGURE 8
8. Place your hand on the top of
the tire and use a pry bar to lift
the bottom of the tire to check
for loose bearings or “chucking”
(see gure 9). If excess
movement or “chucking” is
found, wheel end service is
required.
Before you check for chucking, be sure to grease
the king pins.
NOTE
7
106878a
FIGURE 9
If any of the above conditions
are found, place the vehicle out
of service until the item can be
repaired.
Service Interval
Inspection results at driver pre-
trip, in-route and preventative
maintenance will indicate whether
further service is required.
When inspections indicate that
service is necessary, follow the
recommended service, inspection,
reassembly and reinstallation
instructions found in the following
sections of this manual.
Lubrication Analysis
Beyond the recommended visual
inspection and inspection with
a magnet, develop a lubrication
testing and replacement program.
This program will depend on
vehicle application, and lubrication
type. A lubricant supplier should
be consulted for additional
lubricant inspection and testing
recommendations.

4ConMet
3. Identication
WHEEL MOUNTING
SYSTEMS
ConMet wheel hubs are available
in both hub pilot and ball seat nut
congurations.
Hub Pilot Wheel Mounting
The hub pilot wheel mounting
system makes use of a single
two-piece ange nut on each wheel
stud for both single and dual wheel
applications (see gure 10). The
hub pilot wheel mounting system is
also known as the Uni-Mount-10™
(10 stud), WHD-10™ (10 stud),
WHD-8™ (8 stud), and ISO system.
8
106821a
SINGLE DUAL
Hub Pilot Mounting System
FIGURE 10
Ball Seat Wheel Mounting System
The ball seat wheel mounting
system makes use of the spherical
contact area between the nut and
wheel to both locate the wheel and
hold the wheel tight against the
brake drum (see gure 11).
The ball seat wheel mounting
system is also known as the stud
piloted, ball seat cap nut (BCN)
and double cap nut (DCN) system.
9
106822a
SINGLE DUAL
Ball Seat Mounting System
FIGURE 11
IDENTIFYING CONMET
HUB ASSEMBLIES
Identifying your hub assembly
is important for many reasons.
It will enable you to properly
service the hub assembly
and purchase the appropriate
replacement parts if needed. Plus,
if a warranty issue arises, you’ll
then be able to provide details on
all aspects of the ConMet hub.
This section is devoted to nding
and understanding the different
identication numbers associated
with ConMet hubs.
Vehicle Identication Number
(VIN)
The quickest and easiest method
of identifying your hub assembly
is to note the vehicle identication
number (VIN) and call the truck
dealership. The dealership can
then tell you what hubs were
installed on your vehicle. If this is
not possible, there is a variety of
identication numbers located on a
ConMet hub assembly.
Casting Number
This number is physically cast
into the hub and appears in large
characters usually on the back side
of the mounting ange near the
stud head (see gure 12).
10
106829a
CASTING NUMBER ONTHE
BACK SIDE OF THE
MOUNTING FLANGE
Casting Number on the Back Side of
the Mounting Flange
FIGURE 12
Machining Number
This number is stamped on one of
the following:
-Mounting ange face (see
gure 13)
-Diameter of the mounting
ange (see gure 14)
-Back side of the mounting
ange (see gure 15)
-Barrel of the hub (see gure
16)
The machining number represents
the way the hub is machined
(e.g., hub pilot vs. ball seat, 8.78”
vs. 8.53” vs. 9” brake drum pilot
diameter).
11
106828a
MOUNTING FLANGE FACE
Mounting Flange Face
FIGURE 13
12
106825b
MOUNTING FLANGE DIAMETER
Mounting Flange Diameter
FIGURE 14
13
106826a
MOUNTING FLANGE BACKFACE
Mounting Flange Backface
FIGURE 15

PreSet Plus®Hub
Assemblies
For instructions on installing ConMet's
PreSet Plus hub assemblies (see
gure 19), refer to the PreSet hub
assembly reinstallation instructions
in section 6.
17
PreSet Plus Hub Assembly
FIGURE 19
Conventional Hubs
For instructions on installing ConMet’s
Conventional hub (see gure 17),
refer to the Conventional reinstallation
instructions in section 4.
15
PreSet Plus Hub Assembly
FIGURE 19
PreSet®Hub Assemblies
For instructions on installing
ConMet’s PreSet hub assemblies
(see gure 18), refer to the PreSet
hub reinstallation instructions in
section 5.
16
PreSet Hub Assembly
FIGURE 18
5ConMet
3. Identication (continued)
14
106827a
BARREL OF HUB
Barrel of Hub
FIGURE 16
Final Hub Assembly Number
This number is stamped on one of
the following:
-Mounting ange face (see
gure 13)
-Diameter of the mounting
ange (see gure 14)
-Back side of the mounting
ange (see gure 15)
The nal hub assembly number
identies the hub assembly,
hub machining, studs, bearings,
spacer, seal and ABS ring.
Julian Date
The casting, machining, and the
nal assembly have Julian dates
stamped into the hub assembly in
the same location as the assembly
numbers (see gures 13, 14, 15
and 16). A Julian date appears as
the day of the year plus the last
two digits of the calendar year
(e.g., July 4 2008 would appear as
18508). This number provides the
date when the hub was machined
and assembled at the factory
and may be used for warranty
purposes.

Conventional Hubs
ConMet conventional hubs feature
precision-machined aluminum or
iron castings and are available in
steer, drive and trailer congurations.
Hubs are supplied with bearing
cups and studs installed. Bearing
cones and seal are supplied by the
customer. Bearings must be adjusted
manually. See TMC RP618 specics
of adjustment procedures.
18
106923a
ABS RING
INNER
BEARING
CONE
INNER
BEARING
CUP
OUTER
BEARING
CUP
OUTER
BEARING
CONE
LUBRICANT
FILL PLUG
OIL SEAL
Conventional Hub and Components
FIGURE 20
6
Conventional Wheel Hubs – Recommended Service
ConMet
4. Conventional Wheel Hubs – Recommended Service
When inspections indicate
that service is necessary on a
conventional hub, follow the
recommended service, inspection,
reassembly and reinstallation
instructions found in the following
section.
HUB REMOVAL AND
DISASSEMBLY
Vehicles on jacks can fall, causing serious personal
injury or property damage.Never work under a
vehicle supported by a jack without supporting
the vehicle with stands and blocking the wheels.
Wear safe eye protection.
WARNING
!
1. Park the vehicle on a level
surface. Block the wheels to
prevent the vehicle from moving.
2. Raise the axle until the tires are
off the oor.
3. Place safety stands under the
trailer frame or under each axle
spring seat (see gure 21).
19
1003159a
FIGURE 21
4. Remove the tire and wheel
assembly using procedures
specied by the wheel
manufacturer (see gure 22).
20
103160a
FIGURE 22
Sudden release of compressed air can cause serious
personal injury and damage to components.
Before you service a spring chamber, carefully
follow the manufacturer’s instructions to compress
and lock the spring to completely release the
brake.Verify that no air pressure remains in the
service chamber before you proceed.
WARNING
!
5. If the axle is equipped with
spring brake chambers,
carefully compress and lock
the springs so that they cannot
actuate (see gure 23).
21
103161a
FIGURE 23
6. For drum brakes, remove
the brake drum. Support the
drum during the removal
process to prevent damage
to the components. For disc
brakes, remove caliper per
manufacturers’ recommended
procedure.
If the hub to be disassembled is a drive hub,
remove the drive axle shaft, and capture the oil
(see gure 24).
NOTE
22
106803a
Removing the Drive Axle Shaft
FIGURE 24
7. Place a container under the
hubcap, or drive axle shaft
for a drive hub, to receive the
draining oil, then remove the
hubcap or drive axle shaft.
Do not reuse the oil. Correctly
dispose of the lubricant.
8. Examine the spindle nut to
determine the type of locking
system. Disengage the locking
device.
Do not loosen the axle spindle nuts by either
striking them directly with a hammer, or striking
a drift or chisel placed against them. Damage to
the parts will occur causing possible loss of axle
wheel-end components and serious personal
injury.
WARNING
!
9. Remove the spindle nut system.