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 Identication 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
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