1986/09/29 Caterpillar

Use Correct Compression Seal Washer (Gas Seal) On 7000 Series Fuel Injection Nozzles{1254,1250}

Usage:

3200, 3300, And 3400 Families Of Direct Injection Engines

Reference: Service Magazine, April 1, 1985, Page 4, "New Compression Washers (Gas Seals) Used On 7000 Series Fuel Injection Nozzles".

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 the number 7.

Most of the compression seal washers used on these nozzles have now been 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 copper compression seal washers provide a more consistent holding force. The following chart has been updated to add new compression seal washers and provide seal identification for each fuel nozzle and engine application. The compression seal washer, the carbon dam (seal), and the bleed screw seal washer should be replaced each time the nozzle is tested.

Caterpillar Information System:

1986/09/22 Improved V-Belts For Alternator{1405}

1986/09/22 More Flexible Lockwire Used With Nylon Seals For Sealing Critical Areas{1257,1264}

1986/09/22 Longer Adjusting Screw And Jamnut Available For Use In Valve Rocker Arms{1123,1105}

1986/09/22 Windshield Wiper Motor Cross Reference{7305}

1986/09/22 Time Requirement Guides (TRG) Available{0370,0374}

1986/09/22 Benefits Of Using The Caterpillar Inc. Product Information System{0330,0350,0373}

1986/09/08 Bearing Failures On Engines Due To Lack Of Lubrication{1230,1219,1203,1202}

1986/09/08 Indications Of Engine Overspeeding When Only One Cam Lobe/Lifter Has Failed{1000,1100,1200}

1986/09/08 Product Support Literature For Military Machines{7567}

1986/09/01 Heavy-Duty Line Of Batteries Available To U.S. Dealers{1400,1401}

1986/09/01 New 9W6370 Electronic Speed Switch Adapter Cable Available For Use With 8T5200 Signal Generator/Counter Group{0600}

1986/09/01 Do Not Strike Pin Ends To Loosen Sealed And Lubricated Track{4175}

1986/09/29 Improved Damper Guard Used{1205}

1986/10/13 New Service Tools Available{0600}

1986/10/13 New Piston Oil Ring Gives Better Oil Control{1215}

1986/10/13 Water Level Switch Improved{1354,1350}

1986/10/13 Remanufactured Final Drive Hubs And Housings (U.S. And Canada){4000,4002,4054}

1986/10/20 New Oil Pump Relief Valve Guide{1304}

1986/10/20 Orifice Screen Assembly Now Used For The Timing Advance Mechanism{1251,1272,1288,1292}

1986/10/20 Caterpillar Crankshaft Heat Code Locations{1202}

1986/10/20 Check Connecting Rods After Engine Failures Involving Hydraulic Lock{1218,1225}

1986/10/27 Check Oil Drain Hole In OR2671 Or OR2621 Remanufactured Cylinder Heads If Head Used With Breather{1100,1300,1317}

1986/10/27 Stronger Oil Level Guide Used{1326,1300}

1986/10/27 New Indicator Instrument Group Available To Measure Crankcase Blowby And Radiator Air Velocity{0781,1200,1350}