1995/10/30 Caterpillar

Removal Procedure For Sprocket Bearings Increases Service Life Of Final Drive Hub{4054}

Usage:

D7H (2SB, 4AB, 5WB, 5BF, 2RG, 3XG, 4FG, 77Z, 79Z, 80Z, 82Z),
D8L (4FB, 7YB, 7JC, 53Y),
D8N (9TC, 1XJ, 5TJ, 7TK),
D9L (14Y),
D9N (1JD, 6XJ),
D9R (7TL, 8BL),
D10 (84W, 76X),
D10N (2YD, 3SK),
D11N (4HK, 74Z) Track-Type Tractors;
578 (8HB),
589 (31Z) Pipelayers

The following procedure for the removal of the sprocket bearings will increase the service life of the final drive hub.

Disassembly Procedure

1. Support the final drive hub in a position with the spline end down. Be sure the hub is secure and can not fall over.

Typical Example

2. Use a torch to heat the bearing cage evenly all the way around the bearing. Applying heat to the bearing cage causing it to expand and fall off.

3. Use a torch to heat the bearing raceway evenly all the way around the raceway. Continue to apply the heat in an even manner until the raceway falls off the bearing diameter of the hub. Both the bearing raceway and the bearing cage are now free from the final drive hub. Use Caution, as the bearing cage, bearing raceway, and the hub may be too hot to handle by hand.

4. After the bearing has been removed, the bearing surface should be inspected for signs of overheating, gouges, nicks, or other defects. Determine whether the final drive hub can be reused.

Caterpillar Information System:

1995/10/30 Improvements to Service Information System (SIS) 2.0 Update{0374,0375,0376}

1995/10/23 Dynamometer Testing of Electronic Engines{1913}

1995/10/23 New Blade Cylinder Guards Protect Fitting From Damage In Trenching Applications{5102,5057}

1995/10/23 New Hose Retention Prevents Chafing Of Vibratory And Propel System Hoses{5057,6604}

1995/10/23 Bearings In Rotor Mixing Chamber Improved{6635}

1995/10/23 Improved Wheel Bearing Cone Anti-Rotation System Prevents Wheel Bearing Cones From Rotating On The Axle Housing{4208,4234}

1995/10/23 Rear Edge Of Clam Assembly May Wear In Abrasive Applications{6104,6518}

1995/10/23 Powering and Interfacing to Agricultural Implement Electronic Systems{6800,7300,7332,1408,7490,6331,6304,6330}

1995/10/23 Incident Reports And Parts Involved{0336,0337}

1995/10/16 Adding A Shim Pack To Bottom Hitch Improves Bolt Retention{7100}

1995/10/16 A Change Has Been Made To The 9X-3136 Basic Heater Group To Reduce Leaks{7304}

1995/10/16 Field Repair 0f Cracked 2G-9774 Guard Assembly (Right Front Fender){7252}

1995/10/30 Work Light Improvements To Increase Blade Visibility{1429}

1995/10/30 New ICM Transmission Control (Actual Gear Switch) Is Available{3168}

1995/10/30 New Follower Assembly Used In Lubrication Pump Group{7540}

1995/10/30 New Parts Service Transmission Sleeve Bearing Does Not Require Sizing{3160}

1995/10/30 New Brake Cooler Tubes For The 8W-9884 Oil Cooler Lines Group Reduce Stress{4257}

1995/10/30 New Backup Lamp Group Resists Shock and Vibration{1428}

1995/10/30 Proper Adjustment Of Medium Wheel Loader F-Series II Type Cab Door Bumper{7301,7308}

1995/10/30 Product Support For The Caterpillar Fire Suppression System With Automatic Actuation{7401}

1995/10/30 New Sleeve Bearing Used In Camshaft Idler Gear Assembly In Rear Gear Groups{1206}

1995/11/06 Improved Fan Drive Groups and Belt Tightener Groups Need Scheduled Periodic Lubrication {1359}

1995/11/06 Retrofit of EPTC II To Earlier Machines With ICM Transmissions {3168,3150}

1995/11/06 New Duo-Cone Seal Retainer And Backing Plate Reduces Oil Leaks In The Service And Parking Brake Group {4251,7561}