New Transmission Control Switch Used In Transmission Hydraulic Controls {3168,3171}
Usage:
657E Scrapers;
621E, 621S, 623E, 627E, 631E, 637E, 651E, 657E, 768C ( 2X350-Up ),
772B ( 64W168-Up ),
776 ( 14H206-Up ),
776B Tractors;
769C ( 1X2877-Up ),
773B ( 63W1221-Up ),
777 ( 84A1284-Up ),
777B, 785, 789 Trucks
Description of Change: A new transmission control switch is used in the above machines. The new switch is resiliently mounted to prevent possible contact interruption due to vibration. A new, larger shaft assembly is also used with the new switch.
Adaptable To: The new 9W1409 Transmission Control Switch and 6Y3349 Shaft Assembly, when used together, are direct replacements for the former 7T3419 Transmission Control Switch and former 6T6837 Shaft Assembly.
Caterpillar Information System:
1989/08/07 New Modulating Relief Valve Used In Transmission Hydraulic Controls {3152}
1989/07/24 Improved Control Rod Assembly Used In Fuel Injection Control Groups{1298}
1989/07/24 Stronger Support For Turbocharger Exhaust Elbow And New Coupling Used{1052,1059}
1989/07/24 Stronger Spacer Plate Prevents Cracking{1221,1350}
1989/07/24 Engine Oil Coolers With New Rubber End Sheet Available For Parts Service{1378}
1989/07/24 Check The Radiator Fan Spider Assembly When Doing Yearly General Maintenance{1356}
1989/07/24 Use Correct Grade Shear Bolt For Rotor Drive{5632}
1989/07/24 New Hydraulically-Actuated Belly Guard Available As An Attachment{7151,7153,7154,7158,7182,7185}
1989/07/24 New Lockup Clutch Disc Used In Torque Converter{3102}
1989/07/24 Longer Hinge Brackets Prevent Hoe-type Bucket Deformation{6503}
1989/07/24 Tightening Idler Retention Bolts May Require Torque-Turn Method{4159}
1989/07/24 Steering Diverter "Flip-Flop" Valve Now Drains To Steering Hydraulic Tank{3179,4107,4120}
1989/08/07 New Yoke And Retainer Used In Input Transfer Gears {3159}
1989/08/07 Left Hand Rear View Mirror Improved {7319}
1989/08/07 Pressure Reducing Valve Improves Torque Control {4350,4352}
1989/08/07 Stronger Bolts Available To Service Bevel Gear In Rear Axle {3256}
1989/08/07 Correct Type Of Auger Quarter Segment On Each Side Of Drive Housing {6631}
1989/08/07 New Steering Cylinder Available {4303}
1989/08/07 Varistor Diode Not Listed In Parts Books {5718}
1989/08/07 Braces Added To Reduce Vibration Of Radiator {1353}
1989/08/07 Use Of Front Tires With A Different Profile Effects The Travel Speed Indicator {4203}
1989/08/07 Different Oil Used In Hydraulic System {5068}
1989/08/07 Two Hold-Down Plates Can Be Welded To Hydraulic Tank {5056}
1989/08/07 Replacement Parts For Magnetos Discontinued On Gasoline Starting Engines {1530,1500}