1980/08/25 Caterpillar

Special Bolts Available For Better Protection Against Modifications Of Fuel System And Governor Settings{1264,1278}

Usage:

3406, 3408 Truck Engines

Some customers have desired an improved method to prevent possible modifications of fuel system and governor settings on 3406 and 3408 Truck Engines. For this purpose, special bolts have been released in three different sizes. The new bolts are available only as parts service items; they are not installed at the factory as original equipment. Each of these bolts can be installed in place of one of the standard bolts in the locations shown. When the bolts are correctly installed, removal of the adjustment covers on the governor and fuel ratio control will be very difficult.

The special bolts have two heads. The hex head, which is used to tighten the bolt, breaks off when the bolt is tightened to the correct torque. The second head is round, with no hex or flats for any type of wrench.

Location to install special bolt in fuel ratio control.

Location to install special bolts in governor covers.

Caterpillar Information System:

1980/08/25 Vibration Isolators Used With Vacuum Switches For Air Filter Service Indicators{7452,1051,1054}

1980/08/25 Service Meter Correction Decal Available{7478,7480}

1980/08/18 Some Valve Lifter Assemblies Have A Black Color On The Finished Surface{1209}

1980/08/18 Alcohol Fuels Are Not Recommended For Use In Caterpillar Diesel Engines At The Present Time{1280,0374}

1980/08/11 Higher Capacity Auxiliary Pump Group Is Now Available{1371}

1980/08/11 Carbon Cutting On Thrust Side Of Piston Top Land Is Normal Condition For Pistons With Offset (Not In Center) Pin Bores{1213,1214}

1980/08/11 Improved Power Takeoff Service Kits{3055}

1980/08/11 New Single Key Lock System Uses The Same Standard Key For All Locks{7300,7550}

1980/08/11 Improved Piston Ring Used At Turbine End Of Turbocharger{1052,1053,1077}

1980/08/11 New Oil Filter Base Has Larger Oil Passages; Some Bases Need Modification{1306}

1980/08/11 6V2196 Microscope Available For Inspection Purposes{0653}

1980/08/11 6V3030 Digital Multimeter, 6V3031 Case And 6V3032 Test Lead Kit Are Now Available For Troubleshooting Electrical Circuits And Components{0651}

1980/09/01 Four Fabricated Tools Available For Use During Disassembly And Assembly Of Piston-Type Hydraulic Motors{5058,0622}

1980/09/01 6V2086 And 6V2087 Seal And Wear Sleeve Installers Available{0622,1160,1161}

1980/09/01 6V2119 Profile Tool Group Is Available For Inspection Of All Crankshafts In Caterpillar Engines{0653,1202,1203,1219,1230}

1980/09/01 CAUTION: Procedure For Adjustment Of Fuel Rack Setting On Hydramechanical Governors Has Been Changed{0654,1250}

1980/09/01 5P1746 Governor Sealing Tool Available Separately{0620,1264,1286}

1980/09/08 Cartridge Repair Kit Available For AiResearch Turbochargers{1052,1053}

1980/09/08 Oil Pump And Lines Group Changed To Use Different Method Of Flow Control For Emergency Lubrication System{3310,3311}

1980/09/08 Easy-To-Make Tool Holds Fuel Injection Nozzles According To Cylinder Number{0634,1254}

1980/09/08 New Oil Scavenge Tube Assemblies Used In Oil Lines Groups{1307,1312}

1980/09/08 4S6553 Engine Evaluation Test Instrument Group Has Been Canceled{0651}

1980/09/08 6V3143 Distorter Adapter Available For Use With 5P7409 Wear Sleeve Distorter For Removal Of Crankshaft Wear Sleeves{0621,1202,1160,1161}

1980/09/15 6V3025 Battery Cable Repair Kit Now Available{1402,1408,0611}