1997/10/27 Caterpillar


Changes Made To Water Lines Group In Order To Reduce Damage Caused By Vibration{1380}

Usage:


793 (3SJ),
793B (1HL) Off-Highway Trucks

Description of Change: Changes are made to the water lines groups in the above machines powered by 3516 Engines. An additional bracket and thicker plates to support the manifold, as well as additional lower water line brackets and changing some water lines from steel tubing to flexible wire braid hose, helps reduce vibration. Additional assembly improvements are made to the water lines groups. The bolts used to attach the new bracket are shortened and the bracket is lowered by placing the manifold plate on the top side of the support bracket. Installation of the shunt lines into the manifold is easier because of reduced interference.

Adaptable To: Changes are made to the 9Y-8907 Water Lines Group effective with 793B (1HL61-Up) Off-Highway Trucks. All changes are adaptable back to first production for 793 and 793B Off-Highway Trucks. The changes include:

* Two additional 4P-3563 Clamp Assemblies for the lower water lines (see Chart 1 for necessary parts).


Typical view of the 9Y-8907 Water Lines Group.
View of the 119-6299 Bracket shown in the lowered position, preventing interference during assembly.


Typical view of the 9Y-8907 Water Lines Group.

* The 7E-7507 Water Tube Assembly is changed to the 107-0745 Hose Assembly (flex line). See Chart 2.

* A 107-0766 Manifold allows for two 107-0746 Brackets instead of one. See Chart 3. The 107-0746 Brackets and the 107-0757 Plate Assemblies that support the 107-0766 Manifold, are increased in size for added support.

NOTE: In order to attach the second 107-0766 Bracket to the 7E-2341 Retainer Plate, two holes must be drilled and tapped 279.4 mm (11.11 in) away from the existing 4P-6645 Bracket holes.

Chart 4 and the illustration show the additional changes needed in order to reduce interference with the shunt line to the manifold. The new parts allow the 107-0757 Plate Assembly to be attached to the top side of the 107-0746 Bracket.

Caterpillar Information System:

1997/10/27 New Custom Product Support Literature Is Available For 776C Tractors And 777C Trucks Equipped With Fuel Tank Extension Group{0374}
1997/10/27 New Custom Product Support Literature Is Available For 777B Trucks Equipped With Air Quick Disconnect{0374}
1997/10/27 New Custom Product Support Literature Is Available For 773D And 775D Trucks Equipped With Wiggins Service Center{0374}
1997/10/27 Improved Duo-Cone Seal Group Increases Service Life{4201,4050}
1997/10/27 Reliability Of Transmission Fluid Level Reading Improved With Addition Of Baffle Plate{3081,3080}
1997/10/27 All "H" Series Motor Graders (Except 24H) Are Now Equipped With 2 Cylinder Air Compressors{1803}
1997/10/27 Stronger Sun Visor Guides Available {7300,7340}
1997/10/27 Improved Steering Column Boot Resists Cracking{4338,7300}
1997/10/20 Service Interval Change For Extended Life Coolant Extender And Extended Life Coolant{1395,7543,7545}
1997/10/20 Improved Sealing On Caterpillar Monitoring System And VIMS Modules Provides Resistance To Lens Fogging{7490,7601}
1997/10/20 Service Repair Procedure For Engine Cowls{7263,7251}
1997/10/20 Correct Retaining Ring Specified For Shaft Seal In Piston Motor Group For Fan Drive{5058}
1997/10/27 New Brake Valve Groups Have Breather Plug In Vent Port For Air Cylinder Group{4265}
1997/10/27 Updated VIMS Configurations Available For 793C Off-Highway Trucks{7601,7407,7417,7470,1924}
1997/10/27 Corrected Boom Chain Information For Operation And Maintenance Manual{6460,6404}
1997/10/27 New Vane Pump Group, Assures Clearance For Drive Gear, And Correct Alignment Of Vane Pump Group With Torque Converter Cover{5055}
1997/10/27 New Troubleshooting Guide Available{0374}
1997/10/27 Significant Improvement For Pump Impellers (Water Pumps){1364}
1997/10/27 History Of Pump Impeller (Water Pump) Changes{1364}
1997/11/03 New Tie Rods And Spindle Assemblies Improve Service Life {4329,3282}
1997/11/03 Serviceable Parts Available For Low Pressure Turbocharger In Low Altitude Engine Arrangement {1052}
1997/11/03 Parts For Engine Prelube Motor Now Serviced {1603}
1997/11/03 Improved Seal In Torque Converter Group Available {7555,3101}
1997/11/03 New Radiator Bracket Increases Service Life {1353}
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