1983/10/17 Caterpillar

Stronger Spider Assemblies Used In Fan Groups{1356}

Usage:

768C, 772B Tractors;
769C, 773B Trucks

Description of Change: New spider assemblies are used on 768C and 772B Tractors and on 769C and 773B Trucks. The new spider assemblies have a smaller radius (curvature) on the blade than the former spider assemblies. This smaller radius gives more strength (stiffness) to the spider assembly.

The four outer rivets that hold the blade in place on the new spider assembly are cadmium plated. These rivets will help prevent corrosion between the rivets, blades and spider.

Adaptable As: On 768C Tractors and 769C Trucks, the new 4W6465 Spider Assembly is a direct replacement for the former 8N4029 Spider Assembly. On 772B Tractors and 773B Trucks, the new 4W6466 Spider Assemblies are direct replacements for the former 8N3560 Spider Assemblies. Both of the former spider assemblies are canceled.

Caterpillar Information System:

1983/10/17 Modification Of Control Panel Gives Different Power Source For Overcrank Timer To Prevent Starter Motor Failures{7450}

1983/10/17 Instrument Panel Changed To Give Better Fit For Gauges{7451}

1983/10/17 New Rod And Seal Used To Prevent Oil Leakage Into The Transmission Neutralizer Group{3181}

1983/10/17 Installation Of Vent Assembly Helps Prevent Oil Leakage In The Wheel Leaning Mechanism{5224}

1983/10/17 Fan Drive Conversion Group Available To Change Fans From Gear Driven To Belt Driven{1359,1356}

1983/10/17 Broken Edge Filter Or Plugged Cylinder Head Adapter Can Cause Rough Engine Operation Or Low Power{1252}

1983/10/10 Cab Head Lamps Mounted In New Location For Better Protection{7309}

1983/10/10 New Water Pump Oil Seal Prevents Leaks{1361}

1983/10/10 New Service Centers For 6V3100 Engine Timing Indicator Group{0651}

1983/10/10 New Connecting Rod And Main Bearings Used{1203,1219,1226,1227,1230}

1983/10/10 S.O.S Program Synopsis{1318,5068,3179,0652}

1983/10/03 Use 6V6070 Tool Group And New Adjustment Procedure For New Scroll Fuel System{0654,1264,1278}

1983/10/17 Changes To Torque Converter Inlet Relief Valve Increase Service Life{3167}

1983/10/17 If The Cab Door Is Difficult To Open, Check Nylon Washer For Damage{7308}

1983/10/17 Use Shims At Both Ends Of Housing Assembly To Prevent Oil Leakage From Power Control Group{5201}

1983/10/17 New Rod Ends And Supports Used In Hydraulic Control Groups{5452}

1983/10/17 New Pump Drive Gear And Shaft Have More Clearance{3101,3108}

1983/10/17 Remanufactured Fuel Pump And Governor Groups{1251,1264}

1983/10/17 Valve Damage Can Be Caused By Short Intervals Of Engine Operation In Very Cold Temperatures{1105,1208}

1983/10/24 FT1782 Turbocharger Test Stand Available{0651,1052}

1983/10/24 Changes To Track Motor Guard Improve Protection{7163}

1983/10/31 Clean and Protect Split Master Links During Track Reconditioning{4176}

1983/10/31 Install Seal Correctly In Wheel Leaning Mechanism To Prevent Leakage{5224}

1983/10/31 Additional Remanufactured Water Pumps Available{1361}