Stronger Output Shaft Now Used In 2N3909 Tachometer Drive Adapter{7462}
Usage:
3145, 3150, 3160 and 3208 Industrial Engines;
1140, 1145, 1150, 1160 and 3208 Truck Engines;
613B and 768C Tractors;
769C and 773B Trucks
Description of Change: A stronger output shaft is now used in the 2N3909 Tachometer Drive Adapter for the above models. The method of heat treatment was changed to make both the output shaft and the tang on the shaft have a longer service life.
At the same time the new shaft was put into effect, the Caterpillar part number, drive ratio, and the supplier's part and date code were put on the outside of the housing.
Adaptable As: Direct replacement. Part number did not change.
Caterpillar Information System:
1979/04/02 Improved Fuel Priming Pumps Give Longer Service Life{1258}
1979/04/02 New Pistons And Timing Advance Unit Give Better Emissions Control And Easier Starts{1214,1272}
1979/04/02 A 6V198 Container Kit Is Available To Repair The 5P6225 Transmission Hydraulic Test Group{0651}
1979/03/26 FT1441 Drawing Available To Fabricate A Seal Installer For The 5P7143 Duo-Cone Seal Group{0622}
1979/03/26 A Reverse Connection Of Oil Filter Hoses Can Cause Bearing Failures{1230,1307,1306}
1979/03/26 Four Crankshaft Rear Seals Are Available For Use On 3304 And 3306 Engines{1161}
1979/03/26 6V852 Dust Cap Is Available For Protection Of 5P9711 And 5P9714 Nipple Assemblies{0651}
1979/03/26 Replacement Bushing Available For Cast Iron Rocker Arms Only{1102}
1979/03/26 New Oil Jet Tube In Cylinder Block Gives More Clearance For Pistons And Connecting Rods{1201}
1979/03/26 New Fabricated Tools Available For Service Work On 7211 And 7221 Marine Transmissions{0621,0622,3302,3305}
1979/03/26 Drawing Available For FT1439 Lifting Beam{0644}
1979/03/26 Information About The Use Of Earlier Cylinder Heads And Liners With Spacer Plate Cylinder Blocks; List Of Earlier Articles{0600,1101,1162,1201,1216,1221}
1979/04/09 6V112 Repair Kit Available For Parts Service Of The 8H8558 Nut Spinner{0611}
1979/04/09 Conversion Group Available To Install Woodward Governor On Engines Equipped With Mechanical Governor{1264}
1979/04/09 Serial Numbers Used Instead Of Test Numbers On Power Shift Transmissions{3150,7557}
1979/04/09 New Exhaust Valve Has Improved Three-Piece Construction{1105}
1979/04/09 During Installation Of Crankshaft Piston Ring Seals, Put Silicone Grease In The Groove And On The Seal{1160,1161}
1979/04/16 Testing And Adjusting Procedure For 5P4210 Modular Cab Tilting Cylinder And Valve{0620}
1979/04/16 How To Extend The Service Life Of 1P5550 Fuel Cam Locking Tool Assembly{0654,1250}
1979/04/16 90° Elbows On Quick Disconnect Couplers Make Installation Easier{0690}
1979/04/23 Careful, Correct Installation And Maintenance Of Fuel Injection Lines Is Very Important To Prevent Possible Engine Damage, Fire And Other Problems{1252}
1979/04/23 New Oil Cooler Bonnets Used On 3408 And 3412 Engines{1378,1354,1380}
1979/04/23 Inspection Of Oil Pump After Long Periods Of Service Can Prevent Engine Damage{1304}
1979/04/23 Dowtherm Test Strips No Longer Available{0651,1350}