1997/10/06 Caterpillar

New End Covers Eliminate Seal Spacer Plates For Steering Control Valve Group{4307}

Usage:

789 (9ZC),
789B (7EK),
793 (3SJ),
793B (1HL),
793C (4AR) Off-Highway Trucks

Description of Change: New end covers eliminate seal spacer plates between the end covers and the housing for the steering valve group. The new covers have counterbores for the seals between the covers and the housing.

Adaptable To: The new 141-8247 Cover (1) replaced the former 9T-4021 Cover (3) and 9T-4019 Plate-Seal (4).

The new 141-8245 Cover (2) replaced the former 9T-4022 Cover (5) and 9T-4020 Plate-Seal (6).

Both new covers are adaptable to first production for 789 (9ZC), 789B (7EK), 793 (3SJ), 793B (1HL), and 793C (4AR) Off-Highway Trucks.

9T-1317 and 9T-8931 Steering Valve Groups
View A. New end covers (1) 141-8247 Cover. (2) 141-8245 Cover. (-) 9T-4245 Seal Kit.
View B. Former end covers and seal plates (3) 9T-4021 Cover. (4) 9T-4019 Plate-Seal. (5) 9T-4020 Plate-Seal. (6) 9T-4022 Cover.

Caterpillar Information System:

1997/10/06 Orifice Plate Can Be Removed From 8X-0234 Oil Cooler Lines Group In 793 And 793B Off-Highway Trucks{4257,1365}

1997/10/06 Resistor Harness Reduces Fan's Speed Sensor Faults{1408,1356,1350,1000}

1997/10/06 New Special Edition Is Available For 768C, 772B, 776C, and 776D Tractors; 771C, 771D, And 775D Quarry Trucks; 769C, 769D, 773B, 773D, 777C, And 777D Off-Highway Trucks{0374}

1997/10/06 New Special Edition Is Available For 784B Tractor; 785B, 789, 789B, 793, 793B, and 793C Off-Highway Trucks{0374}

1997/10/06 Improvements Made To H-Series Motor Graders{7475,1408,1429,3073,7304,7309,7450,7451}

1997/10/06 New Differential Lock/Unlock Indicator Light Now Used With H-Series Update{7450,3264,3270}

1997/10/06 New Cab Positioning Procedure For 24H Motor Graders{7301}

1997/10/06 Rotated Cylinder Cap Changes Location Of Hydraulic Line To Protect Line On Blade Lift Cylinder Group{5057,5102}

1997/10/06 Shaft Seal Leaking In Implement Pump Groups{5070}

1997/10/06 New 100 Amp Alternator Now Available{1405}

1997/10/06 New Fan Drive Absorber Increases Service Life{1358}

1997/10/06 New Cab Mount Reduces Vibration{1710}

1997/10/06 Adjustment Procedures Formerly Found Only In Specification Service Manual Modules Have Been Added To Testing And Adjusting Service Manual Modules{0374,0375}

1997/10/06 Do Not Install 16 Ply, 20 Ply, Or L-5 Tires On Single Piece Rim Assemblies{4202,4209}

1997/10/06 Fuel Level Senders Improved To Prevent Open Circuit Conditions{7481}

1997/10/06 New Films Used With Caterpillar Monitoring System{7490}

1997/10/06 Service Charts And Decals Available{0374,0375}

1997/10/06 Proper Welding Procedure On Machines And Engines With Electronic Controls{1400}

1997/10/13 Improved Transmission Oil Dipstick Tube Assembly And Bracket Used{3081}

1997/10/13 Improved Conditioner Condensation Drains{1808,7257,7320,7343}

1997/10/13 Improved Seat Shock Absorber And Arm Assembly Is Available{7324}

1997/10/13 Improved Films And Plates Are Attached With Fasteners{7405}

1997/10/13 Possible Downloading Problem When Truck Payload Measurement V8.0 Is Used With Windows '95{7494}

1997/10/13 Shims Added To Some Off-Highway Truck Front Suspension Mounting Groups{7200,7201}