Front Wheel Hub, Bearing, and Seal Replacement Disc Brakes

Removal Procedure

1. Set the parking brake.
2. Block the vehicle rear wheels.
3. Lift the vehicle frame until the front tire is off the ground.

Notice: Perform the following steps before beginning any vehicle lifting or jacking procedure:

•	Remove or secure all of the vehicle's contents in order to avoid any shifting or any movement that may occur during the vehicle lifting or jacking procedure.

•	The lifting equipment or the jacking equipment weight rating must meet or exceed the weight of the vehicle and any vehicle contents.

•	The lifting equipment or the jacking equipment must meet the operational standards of the lifting equipment or jacking equipment's manufacturer.

•	Perform the vehicle lifting or jacking procedure on a clean, hard, dry, level surface.

•	Perform the vehicle lifting or jacking procedure only at the identified lift points. DO NOT allow the lifting equipment or jacking equipment to contact any other vehicle components.

Failure to perform the previous steps could result in damage to the lifting equipment or the jacking equipment, the vehicle, and/or the vehicle's contents.
4. Support the frame using suitable safety stands.
5. Remove the front tire and wheel assembly. Refer to Wheel Removal (Disc Type - Single Front/Rear) or Wheel Removal (Cast Type - Single Front/Rear) in Tires and Wheels.
6. Remove the caliper assembly (if equipped). Refer to Brake Caliper Replacement .
7. Remove the hub cap (3) and the gasket (4).
8. Remove the following components:

•	The cotter pin (6)

•	The adjusting nut (5)

•	The washer (7)

Important: Do not let the bearing fall to the floor.

9. Pull the wheel and rotor assembly part way off of the spindle of the steering knuckle. Remove the outer wheel bearing.
10. Remove the hub and rotor assembly (10,12) straight off the spindle (16). Use care to prevent damage to the spindle.
11. Remove the seal (15).
12. Remove the inner wheel bearing (14).
13. Remove the bearing cups.

•	Insert a mild steel rod through the opposite end of the hub. Drive the rod against the inner edge of the cups.

•	In order to avoid cocking the cups and damaging the inside of the hub, alternately drive the rod on opposite sides of the cups.

14. Remove the brake rotor (12) by removing the hub-to-rotor bolts (13). Refer to Brake Rotor Replacement in Disc Brakes.
15. Remove the wheel studs (11), if needed, using a press.

Inspection Procedure

Caution: When servicing wheel brake parts, do not create dust by grinding or sanding brake linings or by cleaning wheel bearing parts with compressed air. Many wheel brake parts contain fibers that can become air borne if dust is created during servicing. Breathing dust containing fibers may cause serious bodily harm. A water dampened cloth or water based solution should be used to remove any dust on brake parts. Equipment is commercially available to perform this washing function. These wet methods will prevent fibers from becoming airborne.

Notice: Do not spin the wheel bearings with compressed air to dry them-the wheel bearings may be damaged.

NOTICE: Do not use gasoline, kerosene or any other oil base solvents. These solvents may leave an oily residue on the surface which damages the brake linings and is flammable.

1. Clean the bearings (8, 14) in a suitable solvent. Use a stiff brush in order to remove all of the old lubricant.
2. Clean inside the hub (10) and the disc (12) assembly. Thoroughly clean all of the lubricant out of the inside of the hub. Wipe dry.
3. Remove all gasket particles from the hub (10) outer end. Clean all sealing compound out of the oil seal bore in the hub inner end.

Important: Keep the lubricant off of the disc (12) friction surface. Remove the lubricant with a suitable non-toxic, greaseless type of solvent and wipe the surface clean with clean cloths.

4. Clean the steering knuckle spindle (16). Remove all lubricant with a cloth which has been soaked in solvent.
5. Clean the cap (3) in solvent. Blow dry. Remove all traces of the old gasket.
6. Clean the adjusting nut (5) and washer (7) in solvent. Blow dry.
7. Clean the spindle shoulder (16) and the hub (10) bore. Remove all burrs and sharp edges with an emery cloth. Wipe clean with solvent.
8. Inspect the bearing cups for cracks and pits. Replace any cups that are cracked or pitted.
9. Inspect the cup fit in the hub. If the cups are loose or if the cups can be rotated in the bore, replace the hub (10).
10. Inspect the bearings (8, 14) for excessive wear, chipped edges, and other damage. Refer to Wheel Bearings Diagnosis in Suspension General Diagnosis.
11. Inspect the bearings (8, 14) for flat or rough spots. Slowly roll the bearing rollers around the bearing cone in order to find any flat or rough spots. If you find flat or rough spots, replace the bearings.
12. Inspect the brake rotor (12) . Refer to Brake Pad Inspection in Disc Brakes.
13. Inspect the wheel studs (11) for cracks or damaged threads.

Installation Procedure

Important: If all of the studs were removed, verify that the shield is in place, if used.

1. Install the wheel studs (11), if needed, using a press. Fit the studs tightly.
2. Install the brake rotor (12). Refer to Brake Rotor Replacement in Disc Brakes.
3. Install the hub-to-rotor bolts (13).

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

4. Tighten the hub-to-rotor bolts according to the following specifications:

Tighten

•	1/2-20 to 120 N·m (88 lb ft)

•	5/8-11 to 225 N·m (166 lb ft)

•	9/16-12 to 163 N·m (120 lb ft)

5. Install the bearing cups to the hub.
6. Position each cup in the hub and drive the cup into place using a suitable driver or a brass drift against the outer edge of the cup.
7. If you use a drift, alternately drive against the opposite side in order to drive the cup squarely.
8. Cups must seat against the shoulder in the hub.
9. Install the wheel bearings (14).

Oil or Grease Lubricated Wheel Bearing Installation

1. Whenever oil or grease is indicated in this procedure, use as specified in Fluid and Lubricant Recommendations in Maintenance and Lubrication.

Important: 

•	Use a greasing machine if available. If a greasing machine is not available, pack the bearings by hand. You MUST thoroughly work the grease into the bearings, between the rollers, the core, and the cage.

•	Apply a thin coat of grease to the inside of the hub (10) and the spindle (16). DO NOT fill the hub with grease. A thin coat of grease 3 mm (1/8 in) thick will help to retard rusting. Allow some excess grease at the inside of the bearings and around the adjusting nut.

2. If the bearings are not oil lubricated, pack the bearings with high-temperature wheel bearing grease.
3. Install the inner bearing (14) to the hub (10).
4. Apply grease to the lips of the new seal (15).
5. Apply a thin layer of non-hardening sealing compound to the hub seal bore.

Important: Face the seal lip inside the hub (10). Provide enough clearance between the seal (15) and the bearing (14) so that the bearing can rotate freely without rubbing against the seal.

6. Install the new seal (15) to the hub (10). Press the seal into the hub (10) until the seal seats against the bearing cup.
7. Install the hub (10) and the disc assembly (12) to the spindle (16). DO NOT damage the seal or the flange ring.
8. Install the outer wheel bearing (8).
9. Install the washer (7).
10. Install the adjusting nut (5). DO NOT tighten the nut.
11. Install the caliper assembly, if equipped. Refer to Brake Caliper Replacement .
12. Install the front tire and wheel assembly. Refer to Wheel Installation (Disc Type - Single Front/Rear) or Wheel Installation (Cast Type - Single Front/Rear) in Tires and Wheels.
13. Adjust the front wheel bearings. Refer to Wheel Bearing Adjustment .
14. Install a new gasket (4). Install the hub cap (3).

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

15. Install the washers (2) and the bolts (1).

Tighten
Tighten the hub cap bolt (1) evenly to 13 N·m (115 lb in).




16. If oil lubrication is used, fill oil to the level on the window (2).
17. Install the window plug (1).
18. Adjust the brakes. Refer to Disc Brakes.
19. Lower the vehicle.
20. Remove the blocks.

Front Wheel Hub, Bearing, and Seal Replacement Drum Brakes

Removal Procedure

1. Set the parking brake.
2. Block the vehicle rear wheels.
3. Lift the vehicle frame until the front tire is off the ground.

Notice: Perform the following steps before beginning any vehicle lifting or jacking procedure:

•	Remove or secure all of the vehicle's contents in order to avoid any shifting or any movement that may occur during the vehicle lifting or jacking procedure.

•	The lifting equipment or the jacking equipment weight rating must meet or exceed the weight of the vehicle and any vehicle contents.

•	The lifting equipment or the jacking equipment must meet the operational standards of the lifting equipment or jacking equipment's manufacturer.

•	Perform the vehicle lifting or jacking procedure on a clean, hard, dry, level surface.

•	Perform the vehicle lifting or jacking procedure only at the identified lift points. DO NOT allow the lifting equipment or jacking equipment to contact any other vehicle components.

Failure to perform the previous steps could result in damage to the lifting equipment or the jacking equipment, the vehicle, and/or the vehicle's contents.
4. Support the frame using suitable safety stands.
5. Remove the front tire and wheel assembly.
6. Remove the hub cap (3) and the gasket (4).
7. Remove the cotter pin (6), the adjusting nut (5), and the washer (7).

Important: Do not let the bearing fall to the floor.

8. Pull the hub-and-drum assembly.
9. Remove the hub-and-drum assembly (10,11) straight off the spindle (15). Use care to prevent damage to the spindle.
10. Remove the seal (14).
11. Remove the inner wheel bearing (13).
12. Remove the bearing cups.

•	Insert a mild steel rod through the opposite end of the hub. Drive the rod against the inner edge of the cups.

•	In order to avoid cocking the cups and damaging the inside of the hub, alternately drive the rod on opposite sides of the cups.

13. Remove the brake drum (10) by removing the hub-to-drum bolts. Refer to Brake Drum Replacement in Air Drum.
14. Remove the wheel studs (11), if needed, using a press.

Inspection Procedure

Caution: When servicing wheel brake parts, do not create dust by grinding or sanding brake linings or by cleaning wheel bearing parts with compressed air. Many wheel brake parts contain fibers that can become air borne if dust is created during servicing. Breathing dust containing fibers may cause serious bodily harm. A water dampened cloth or water based solution should be used to remove any dust on brake parts. Equipment is commercially available to perform this washing function. These wet methods will prevent fibers from becoming airborne.

Notice: Do not spin the wheel bearings with compressed air to dry them-the wheel bearings may be damaged.

NOTICE: Do not use gasoline, kerosene or any other oil base solvents. These solvents may leave an oily residue on the surface which damages the brake linings and is flammable.

1. Clean the bearings (8, 13) in a suitable solvent. Use a stiff brush in order to remove all of the old lubricant.
2. Clean inside the hub (12) and the drum (10) assembly. Thoroughly clean all of the lubricant out of the inside of the hub. Wipe dry.
3. Remove all gasket particles from the hub (3) outer end. Clean all sealing compound out of the oil seal bore in the hub inner end.

Important: Keep the lubricant off of the drum (10) friction surface. Remove the lubricant with a suitable non-toxic, greaseless type of solvent and wipe the surface clean with clean cloths.

4. Clean the steering knuckle spindle (15) . Remove all lubricant with a cloth which has been soaked in solvent.
5. Clean the cap (3) in solvent. Blow dry. Remove all traces of the old gasket.
6. Clean the adjusting nut (5) and washer (7) in solvent. Blow dry.
7. Clean the spindle (15) shoulder and the hub bore. Remove all burrs and sharp edges with an emery cloth. Wipe clean with solvent.
8. Inspect the bearing cups (8, 13) for cracks and pits. Replace any cups that are cracked or pitted.
9. Inspect the cup fit in the hub. If the cups are loose or if the cups can be rotated in the bore, replace the hub.
10. Inspect the bearings (8, 13) for excessive wear, chipped edges, and other damage. Refer to Wheel Bearings Diagnosis in Suspension General Diagnosis.
11. Inspect the bearings (8, 13) for flat or rough spots. Slowly roll the bearing rollers around the bearing cone in order to find any flat or rough spots. If you find flat or rough spots, replace the bearings.
12. Inspect the brake drum (10) . Refer to Brake Drum Inspection in Air Drum.
13. Inspect the wheel studs (11) for cracks or damaged threads.

Installation Procedure

Important: If all of the studs were removed, verify that the shield is in place, if used.

1. Install the wheel studs (11), if needed, using a press. Fit the studs tightly.
2. Install the brake drum (10). Refer to Brake Drum Inspection in Air Drum.
3. Install the bearing cups to the hub.
4. Position each cup in the hub and drive the cup into place using a suitable driver or a brass drift against the outer edge of the cup.
5. If you use a drift, alternately drive against the opposite side in order to drive the cup squarely.
6. Cups must seat against the shoulder in the hub.
7. Install the wheel bearings.

Oil or Grease Lubricated Wheel Bearing Installation

1. Whenever oil or grease is indicated in this procedure, use as specified in Fluid and Lubricant Recommendations in Maintenance and Lubrication.

Important: 

•	Use a greasing machine if available. If a greasing machine is not available, pack the bearings by hand. You MUST thoroughly work the grease into the bearings, between the rollers, the core, and the cage.

•	Apply a thin coat of grease to the inside of the hub (12) and the spindle (15). DO NOT fill the hub with grease. A thin coat of grease 3 mm (1/8 in) thick will help to retard rusting. Allow some excess grease at the inside of the bearings and around the adjusting nut.

2. If the bearings are not oil lubricated, pack the bearings with high-temperature wheel bearing grease.
3. Install the inner bearing (13) to the hub (12).
4. Apply grease to the lips of the new seal (14).
5. Apply a thin layer of non-hardening sealing compound to the hub seal bore.

Important: Face the seal lip inside the hub (12). Provide enough clearance between the seal (14) and the bearing (13) so that the bearing can rotate freely without rubbing against the seal.

6. Install the new seal (14) to the hub (12). Press the seal into the hub (12) until the seal seats against the bearing cup.
7. Install the hub (12) and the drum assembly (10) to the spindle (15). DO NOT damage the seal or the flange ring.
8. Install the outer wheel bearing (8).
9. Install the washer (7).
10. Install the adjusting nut (5). DO NOT tighten the nut.
11. Install the front tire and wheel assembly.
12. Adjust the front wheel bearings. Refer to Wheel Bearing Adjustment .
13. Install a new gasket (4). Install the hub cap (3).

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

14. Install the washers (2) and the bolts (1).

Tighten
Tighten the hub cap bolt (1) evenly to 13 N·m (115 lb in).




15. If oil lubrication is used, fill oil to the level on the window (2).
16. Install the window plug (1).
17. Adjust the brakes. Refer to Air Drum Brake Adjustment in Air Drum.
18. Lower the vehicle.
19. Remove the blocks.

Front Wheel Hub, Bearing, and Seal Replacement Disc Brakes with Cast Wheel

Removal Procedure

1. Set the parking brake.
2. Block the vehicle rear wheels.
3. Lift the vehicle frame until the front tire is off the ground.

Notice: Perform the following steps before beginning any vehicle lifting or jacking procedure:

•	Remove or secure all of the vehicle's contents in order to avoid any shifting or any movement that may occur during the vehicle lifting or jacking procedure.

•	The lifting equipment or the jacking equipment weight rating must meet or exceed the weight of the vehicle and any vehicle contents.

•	The lifting equipment or the jacking equipment must meet the operational standards of the lifting equipment or jacking equipment's manufacturer.

•	Perform the vehicle lifting or jacking procedure on a clean, hard, dry, level surface.

•	Perform the vehicle lifting or jacking procedure only at the identified lift points. DO NOT allow the lifting equipment or jacking equipment to contact any other vehicle components.

Failure to perform the previous steps could result in damage to the lifting equipment or the jacking equipment, the vehicle, and/or the vehicle's contents.
4. Support the frame using suitable safety stands.
5. Remove the front tire and wheel assembly.
6. Remove the caliper assembly (if equipped). Refer to Brake Caliper Replacement .
7. Remove the hub cap (3) and the gasket (4).
8. Remove the following components:

•	The cotter pin (6)

•	The adjusting nut (5)

•	The washer (7)

Important: Do not let the bearing fall to the floor.

9. Pull the wheel and rotor assembly (14,15) part way off of the spindle of the steering knuckle (19). Remove the outer wheel bearing (8).
10. Remove the wheel and rotor assembly (14,15) straight off the spindle. Use care to prevent damage to the spindle.
11. Remove the seal (18).
12. Remove the inner wheel bearing (17).
13. Remove the bearing cups.

•	Insert a mild steel rod through the opposite end of the wheel. Drive the rod against the inner edge of the cups.

•	In order to avoid cocking the cups and damaging the inside of the wheel, alternately drive the rod on opposite sides of the cups.

14. Remove the brake rotor (15). Remove the wheel-to-rotor bolts (16), the washers (10), and the nuts (9). Refer to Brake Rotor Replacement in Disc Brakes.
15. Remove the wheel studs (13), if needed, using a press.

Inspection Procedure

Caution: When servicing wheel brake parts, do not create dust by grinding or sanding brake linings or by cleaning wheel bearing parts with compressed air. Many wheel brake parts contain fibers that can become air borne if dust is created during servicing. Breathing dust containing fibers may cause serious bodily harm. A water dampened cloth or water based solution should be used to remove any dust on brake parts. Equipment is commercially available to perform this washing function. These wet methods will prevent fibers from becoming airborne.

Notice: Do not spin the wheel bearings with compressed air to dry them-the wheel bearings may be damaged.

NOTICE: Do not use gasoline, kerosene or any other oil base solvents. These solvents may leave an oily residue on the surface which damages the brake linings and is flammable.

1. Clean the bearings (8, 17) in a suitable solvent. Use a stiff brush in order to remove all of the old lubricant.
2. Clean inside the wheel-and-disc (15) assembly. Thoroughly clean all of the lubricant out of the inside of the wheel. Wipe dry.
3. Remove all gasket particles from the hub (14) outer end. Clean all sealing compound out of the oil seal bore in the wheel inner end.

Important: Keep the lubricant off of the disc (15) friction surface. Remove the lubricant with a suitable non-toxic, greaseless type of solvent and wipe the surface clean with clean cloths.

4. Clean the steering knuckle spindle (19). Remove all lubricant with a cloth which has been soaked in solvent.
5. Clean the cap (3) in solvent. Blow dry. Remove all traces of the old gasket.
6. Clean the adjusting nut (5) and washer (7) in solvent. Blow dry.
7. Clean the spindle shoulder (19) . Remove all burrs and sharp edges with an emery cloth. Wipe clean with solvent.
8. Inspect the bearing cups for cracks and pits. Replace any cups that are cracked or pitted.
9. Inspect the cup fit in the wheel (14) . If the cups are loose or if the cups can be rotated in the bore, replace the wheel.
10. Inspect the bearings (8, 17) for excessive wear, chipped edges, and other damage. Refer to Wheel Bearings Diagnosis in Suspension General Diagnosis.
11. Inspect the bearings (8, 17) for flat or rough spots. Slowly roll the bearing rollers around the bearing cone in order to find any flat or rough spots. If you find flat or rough spots, replace the bearings.
12. Inspect the brake rotor (15) . Refer to Brake Pad Inspection in Disc Brakes.
13. Inspect the wheel studs (13) for cracks or damaged threads.

Installation Procedure

Important: If all the studs were removed, verify that the shield is in place, if used.

1. Install the wheel studs (13), if needed, using a press. Fit the studs tightly.
2. Install the brake rotor. Refer to Brake Rotor Replacement in Disc Brakes.
3. Install the wheel-to-rotor bolts (16), the washers (10), and the nuts (9).

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

4. Tighten the Dayton-Walther hub-to-drum nuts/hub-to-rotor bolts according to the following specifications:

Tighten

•	7/16-20 to 54 N·m (40 lb ft)

•	1/2-20 to 90 N·m (66 lb ft)

•	9/16-18 to 110 N·m (81 lb ft)

•	5/8-18 to 151 N·m (110 lb ft)

•	3/4-16 to 300 N·m (221 lb ft)

5. Install the bearing cups to the hub.
6. Position each cup in the hub and drive the cup into place using a suitable driver or a brass drift against the outer edge of the cup.
7. If you use a drift, alternately drive against the opposite side in order to drive the cup squarely.
8. Cups must seat against the shoulder in the hub.
9. Install the wheel bearings.

Oil or Grease Lubricated Wheel Bearing Installation

1. Whenever oil or grease is indicated in this procedure, use as specified in Fluid and Lubricant Recommendations in Maintenance and Lubrication.

Important: 

•	Use a greasing machine if available. If a greasing machine is not available, pack the bearings by hand. You MUST thoroughly work the grease into the bearings, between the rollers, the core, and the cage.

•	Apply a thin coat of grease to the inside of the wheel (14) and the spindle (19). DO NOT fill the hub with grease. A thin coat of grease 3 mm (1/8 in) thick will help to retard rusting. Allow some excess grease at the inside of the bearings and around the adjusting nut.

2. Pack the bearings with high-temperature wheel bearing grease, if the bearings are not oil lubricated.
3. Install the inner bearing (17) to the wheel (14).
4. Apply grease to the lips of a new seal (18).
5. Apply a thin layer of non-hardening sealing compound to the hub seal bore.

Important: Face the seal lip inside the wheel (14). Provide enough clearance between the seal (18) and the bearing (17) so that the bearing can rotate freely without rubbing against the seal.

6. Install the new seal (18) to the wheel (14). Press the seal into the wheel (14) until the seal seats against the bearing cup.
7. Install the wheel (14) and the disc assembly (15) to the spindle (19). DO NOT damage the seal or the flange ring.
8. Install the outer wheel bearing (8).
9. Install the washer (7).
10. Install the adjusting nut (5). DO NOT tighten the nut.
11. Install the caliper assembly, if equipped. Refer to Brake Caliper Replacement .
12. Install the front tire and wheel assembly.
13. Adjust the front wheel bearings. Refer to Wheel Bearing Adjustment .
14. Install a new gasket (4). Install the hub cap (3).

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

15. Install the washers (2) and the bolts (1).

Tighten
Tighten the hub cap bolt (1) evenly to 13 N·m (115 lb in).




16. If oil lubrication is used, fill oil to the level on the window (2).
17. Install the window plug (1).
18. Adjust the brakes. Refer to Disc Brakes.
19. Lower the vehicle.
20. Remove the blocks.

Front Wheel Hub, Bearing, and Seal Replacement Drum Brakes with Cast Wheel

Removal Procedure

1. Set the parking brake.
2. Block the vehicle rear wheels.
3. Lift the vehicle frame until the front tire is off the ground.

Notice: Perform the following steps before beginning any vehicle lifting or jacking procedure:

•	Remove or secure all of the vehicle's contents in order to avoid any shifting or any movement that may occur during the vehicle lifting or jacking procedure.

•	The lifting equipment or the jacking equipment weight rating must meet or exceed the weight of the vehicle and any vehicle contents.

•	The lifting equipment or the jacking equipment must meet the operational standards of the lifting equipment or jacking equipment's manufacturer.

•	Perform the vehicle lifting or jacking procedure on a clean, hard, dry, level surface.

•	Perform the vehicle lifting or jacking procedure only at the identified lift points. DO NOT allow the lifting equipment or jacking equipment to contact any other vehicle components.

Failure to perform the previous steps could result in damage to the lifting equipment or the jacking equipment, the vehicle, and/or the vehicle's contents.
4. Support the frame using suitable safety stands.
5. Remove the front tire and wheel assembly.
6. Remove the hub cap (3) and the gasket (4).
7. Remove the following components:

•	The cotter pin (6)

•	The adjusting nut (5)

•	The washer (7)

Important: Do not let the bearing fall to the floor.

8. Pull the wheel and drum assembly (14,15) part way off of the spindle of the steering knuckle (19). Remove the outer wheel bearing (8).
9. Remove the wheel and drum assembly (14,15) straight off the spindle (19). Use care to prevent damage to the spindle.
10. Remove the seal (18).
11. Remove the inner wheel bearing (17).
12. Remove the bearing cups.

•	Insert a mild steel rod through the opposite end of the wheel. Drive the rod against the inner edge of the cups.

•	In order to avoid cocking the cups and damaging the inside of the wheel, alternately drive the rod on opposite sides of the cups.

13. Remove the brake drum (15) by removing the drum-to-wheel bolts (16). Refer to Brake Drum Replacement in Air Drum.
14. Remove the wheel studs (13), if needed, using a press.

Inspection Procedure

Caution: When servicing wheel brake parts, do not create dust by grinding or sanding brake linings or by cleaning wheel bearing parts with compressed air. Many wheel brake parts contain fibers that can become air borne if dust is created during servicing. Breathing dust containing fibers may cause serious bodily harm. A water dampened cloth or water based solution should be used to remove any dust on brake parts. Equipment is commercially available to perform this washing function. These wet methods will prevent fibers from becoming airborne.

Notice: Do not spin the wheel bearings with compressed air to dry them-the wheel bearings may be damaged.

NOTICE: Do not use gasoline, kerosene or any other oil base solvents. These solvents may leave an oily residue on the surface which damages the brake linings and is flammable.

1. Clean the bearings (8, 17) in a suitable solvent. Use a stiff brush in order to remove all of the old lubricant.
2. Clean inside the wheel-and-drum (14, 15) assembly. Thoroughly clean all of the lubricant out of the inside of the wheel. Wipe dry.
3. Remove all gasket particles from the hub (3) outer end. Clean all sealing compound out of the oil seal bore in the wheel inner end.

Important: Keep the lubricant off of the drum (15) friction surface. Remove the lubricant with a suitable non-toxic, greaseless type of solvent and wipe the surface clean with clean cloths.

4. Clean the steering knuckle spindle (19) . Remove all lubricant with a cloth which has been soaked in solvent.
5. Clean the cap (3) in solvent. Blow dry. Remove all traces of the old gasket.
6. Clean the adjusting nut (5) and washer (7) in solvent. Blow dry.
7. Clean the spindle (19) shoulder. Remove all burrs and sharp edges with an emery cloth. Wipe clean with solvent.
8. Inspect the bearing cups (8, 17) for cracks and pits. Replace any cups that are cracked or pitted.
9. Inspect the cup fit in the wheel. If the cups are loose or if the cups can be rotated in the bore, replace the wheel.
10. Inspect the bearings (8, 17) for excessive wear, chipped edges, and other damage. Refer to Wheel Bearings Diagnosis in Suspension General Diagnosis.
11. Inspect the bearings (8, 17) for flat or rough spots. Slowly roll the bearing rollers around the bearing cone in order to find any flat or rough spots. If you find flat or rough spots, replace the bearings.
12. Inspect the brake drum (15) . Refer to Brake Drum Inspection in Air Drums.
13. Inspect the wheel studs (13) for cracks or damaged threads.

Installation Procedure

Important: If all of the studs were removed, verify that the shield is in place, if used.

1. Install the wheel studs (13), if needed, using a press. Fit the studs tightly.
2. Install the brake drum. Refer to Brake Drum Inspection .
3. Install the hub-to-drum bolts (16), the washers (10), and the nuts (9).

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

4. Tighten the Dayton-Walther hub-to-drum nuts according to the following specifications:

Tighten

•	7/16-20 to 54 N·m (40 lb ft)

•	1/2-20 to 90 N·m (66 lb ft)

•	9/16-18 to 110 N·m (81 lb ft)

•	5/8-18 to 151 N·m (110 lb ft)

•	3/4-16 to 300 N·m (221 lb ft)

5. Install the bearing cups to the hub.
6. Position each cup in the hub and drive the cup into place using a suitable driver or a brass drift against the outer edge of the cup.
7. If you use a drift, alternately drive against the opposite side in order to drive the cup squarely.
8. Cups must seat against the shoulder in the hub.
9. Install the wheel bearings.

Oil or Grease Lubricated Wheel Bearing Installation

1. Whenever oil or grease is indicated in this procedure, use as specified in Fluid and Lubricant Recommendations in Maintenance and Lubrication.

Important: 

•	Use a greasing machine if available. If a greasing machine is not available, pack the bearings by hand. You MUST thoroughly work the grease into the bearings, between the rollers, the core, and the cage.

•	Apply a thin coat of grease to the inside of the wheel (14) and the spindle (19). DO NOT fill the hub with grease. A thin coat of grease 3 mm (1/8 in) thick will help to retard rusting. Allow some excess grease at the inside of the bearings and around the adjusting nut.

2. If the bearings are not oil lubricated, pack the bearings with high-temperature wheel bearing grease.
3. Install the inner bearing (17) to the wheel (14).
4. Apply grease to the lips of a new seal (18).
5. Apply a thin layer of non-hardening sealing compound to the hub seal bore.

Important: Face the seal lip inside the wheel (14). Provide enough clearance between the seal (18) and the bearing (17) so that the bearing can rotate freely without rubbing against the seal.

6. Install the new seal (18) to the wheel (14). Press the seal into the wheel (14) until the seal seats against the bearing cup.
7. Install the wheel (14) and the drum assembly (15) to the spindle (19). DO NOT damage the seal or the flange ring.
8. Install the outer wheel bearing (8).
9. Install the washer (7).
10. Install the adjusting nut (5). DO NOT tighten the nut.
11. Install the front tire and wheel assembly.
12. Adjust the front wheel bearings. Refer to Wheel Bearing Adjustment .
13. Install a new gasket (4). Install the hub cap (3).

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

14. Install the washers (2) and the bolts (1).

Tighten
Tighten the hub cap bolt (1) evenly to 13 N·m (115 lb in).




15. If oil lubrication is used, fill oil to the level on the window (2).
16. Install the window plug (1).
17. Adjust the brakes. Refer to Air Drum Brake Adjustment in Air Drum.
18. Lower the vehicle.
19. Remove the blocks.