1985/04/01 Caterpillar

New Compression Washers (Gas Seals) Used On 7000 Series Fuel Injection Nozzles{1254,1250}

Usage:

3200, 3300 And 3400 Series Direct Injection Engines

Description of Change: The Caterpillar 7000 Series Fuel Injection Nozzle is used on many of the above direct injection engines. This nozzle is identified as the 7000 Series because the last four digits of the part number begin with 7. The illustration shows a typical 7000 Series Fuel Injection Nozzle.

Some of the compression seal washers used on these nozzles have changed to a copper material. The former compression seal washers, made from nylon, could lose a small amount of thickness because of installation force and operating temperatures. The new copper compression seal washers provide a more consistent holding force. The chart identifies the correct compression seal washer for each fuel injection nozzle and application. The compression seal washer and the carbon dam (seal) should be replaced each time the nozzle is tested.

Typical 7000 Series Fuel Injection Nozzle.

Caterpillar Information System:

1985/04/01 Improved Vibration Damper Guard Group Has Flexible Mounting{1205,1200}

1985/04/01 Use Of Fuel Injection Timing Information In The "Fuel Setting And Related Information" Microfiche{0600,0782,1250}

1985/03/25 New Main Shaft Bearing Assembly Has Reduced End Play{3306}

1985/03/25 Changes To Turbocharged Truck Engines For 1985{1000,1050,1052,1100,1200,1250,1252}

1985/03/18 Improved Oil Ring For Pistons Eliminates Expander Problems That Lead To Ring Breakage During Installation{1215}

1985/03/18 Remanufactured Bare Cylinder Heads (U.S. And Canada){1101,7754}

1985/03/18 New Service Manual Binders Are Made From Thicker Material{0375}

1985/03/18 Internal Seals In 7000 Series Fuel Injection Nozzles Cannot Be Replaced{1254}

1985/03/18 New Service Tools Available{0600}

1985/03/11 Input Shaft And Flange Available As An Assembly; Makes Alignment Easier{3303}

1985/03/11 Dowtherm 209 Full-Fill Coolant{1350}

1985/03/11 New Cooling System Temperature Regulator Available{1355}

1985/04/01 Information For Ordering kPa or Dual Scale Gauges{0600}

1985/04/01 Check Cylinder Block And Head Flatness Whenever There Is A Head Gasket Failure{1100,1200}

1985/04/01 New Lubricator Tip Available For Track Seal And Lubrication Testing Group{0600,0645}

1985/04/01 New Turbocharger Oil Supply Tube Assembly Used{1052,1307}

1985/04/01 More Tools Added To 6V9413 Custom Track Service Tool Kit{0600}

1985/04/08 Changes To Exhaust Manifolds Help Prevent Broken Studs{1059}

1985/04/08 Preferred Locations For Water Temperature Protection Devices{7403,7417,7420}

1985/04/08 Electric Hour Meter Failures{7450,7478}

1985/04/08 Differential Oil Pressure Gauge For Oil Filter Shows High Differential Pressure{1300,1306,1315}

1985/04/08 Several Types Of Automatic Voltage Regulators (AVR) Used In SR4 Generators{4450}

1985/04/08 Additional Zinc Rods Improve Service Life Of Sea Water Heat Exchanger{1379}

1985/04/08 New Outer Governor Spring And Torque Control Pin Used In Governor And Pump Groups{1264}