1993/10/18 Caterpillar

Proper Sizing Of Transmission Sleeve Bearing Replacement Necessary For Increased Service Life {3160}

Usage:

785 (8GB),
785B (6HK),
789 (9ZC),
789B (7EK),
793 (3SJ),
793B (1HL) Trucks

When the 3T-0052 Sleeve Bearing is replaced during transmission rebuild the parts replacement bearing must be finished to the proper inside diameter after it has been installed in the piston. See illustration and chart.

The newly installed bearing must be finished by boring, burnishing or sanding to the size shown in the illustration. The inside diameter surface texture must be 1.6 micrometers (63 microinches) or smoother. All abrasive residue must be removed.

If this procedure is not followed, bearing damage or failure could occur.

When a new balance piston assembly (3T-0053 or 6Y-2981) is installed the new bearing (correctly sized) is part of the assembly.

Balance piston assembly. (1) 3T-0052 Bearing. (A) 133.400 ± 0.013 mm (5.2520 ± .0005 in) diameter.

Caterpillar Information System:

1993/10/18 New Differential Group With Tapered Roller Bearings Used For Improved Product Reliability {3258}

1993/10/18 Torque Converter Stall Speeds On Backhoe Loader {3101}

1993/10/18 New Parking Brake Test Procedure {4267}

1993/10/18 New Pinion Bearing Cone Now Being Used To Prevent Bolt Failure {3280}

1993/10/11 New Connecting Rod Identification Used On Engines {1218}

1993/10/11 New O-ring Seal Used On Cylinder Block Covers {1200}

1993/10/11 New 9U7360 Piston Ring Groove Gauge Group Available {0763,1214,1215}

1993/10/11 New Turbine Type Air Starter Available As An Attachment {1451}

1993/10/11 New Stronger Oil Filter Support Used {1306,1307}

1993/10/11 Improved Fan Drive Groups And Belt Tightener Group Eliminates Scheduled Periodic Lubrication {1359}

1993/10/11 Parts Manual Maintenance Parts Page Improved {0374}

1993/10/11 Asphalt Paver Feeder Drag Chain Now Serviced With Chain Strand Groups {6630}

1993/10/18 Bearings Are Used To Prevent Seizure Of Rear Suspension Cylinder Pins {3260,7051,7213}

1993/10/18 Optional Dash Decal Offers English Text Instead Of International Symbols {7405}

1993/10/18 Procedure For Tightening Tapered Vertical Hitch Pins {7113,7100}

1993/10/18 Checking Tightening Torque Of Wheel Assembly Bolts No Longer Necessary At Predelivery {4202}

1993/10/18 Curved Profile Nosing Bars Are Now Used With The VIP Screed {6643}

1993/10/18 24V Fog Lamp Now Available {1400}

1993/10/18 New Cylinder Head, Spacer Block, And Head Gasket Available {1101,1124,1221}

1993/10/18 Longer Bolts Required With New Spacer Block {1124}

1993/10/25 New Fan Guards Used In Suction Fan Group{1360}

1993/10/25 Change In The Assembly Procedure Of The Damper In The Parking And Service Brake Group Provides Greater Reliability{4151,4267}

1993/10/25 Heavy-Duty Seal Kit Availble For Servicing Brake Calipers{4256,4250}

1993/10/25 Stronger Drive Chains Available For Parts Service{3261}