1979/03/05 Caterpillar

New Fuel Injection Nozzles Are Used In 3208 Engines{1254}

Usage:

3208 Engines;
Industrial (90N37285-Up);
Marine (75V4113-Up);
Vehicular (79V5380-Up) and Truck (32Y1-Up)

SUPPLEMENT: 05/07/79

SERVICE MAGAZINE, MARCH 5, 1979, PAGE 3. In the article "New Fuel Injection Nozzles Are Used In 3208 Engines", the 75V4002-up Serial Number shown for marine engines is wrong. Change 75V4002-up to read 75V4113-up.

--------------- END SUPPLEMENT ---------------

Description of Change: A new fuel injection nozzle is used on 3208 Engines starting with the serial numbers shown above. The new injection nozzle has a smaller "SAC" volume than the former injection nozzle. "SAC" volume is the remainder of fuel in the tip of the injector nozzle after injection. This gives a reduction in the amount of fuel that will get into the cylinder after each injection. The new fuel injection nozzles give a reduction in the amount of hydro-carbon emissions.

Adaptable To: The new 9N3979 Injection Nozzle Assembly is used in the engines shown above, including truck engines that are equipped with exhaust gas recirculation (EGR) systems.

This new nozzle must not be used in 3208 Engines that have serial numbers earlier than those shown. The 9N3299 and 9L6969 Fuel Injection Nozzles are still available for parts service of earlier 3208 Engines.

Caterpillar Information System:

1979/03/05 New Piston And Connecting Rod Are Tapered In Area Of Piston Pin{1213,1214,1218,1219}

1979/03/05 New Engine Cylinder Block Used{1201}

1979/03/05 Main Bearings Now Have Larger Diameter Oil Hole For Better Lubrication Of Main And Rod Bearings{1203,1219,1300}

1979/02/19 Engine Valve Springs Are Now Made Of Carbon Steel Alloy{1101,1108}

1979/02/19 New Exhaust Pipe Connector Makes A Tighter Seal Between Pipe And Manifold{1061,1059}

1979/02/19 New Exhaust Valve And Valve Guide{1104,1105}

1979/02/19 Modification Of 5P9726 Plug Gauge That Is Used To Check Brake Wear{0653}

1979/02/19 Use Correct Procedure To Clean The Engine Lubrication System If Permanent Type Antifreeze (Ethylene Glycol) Is In The Engine{1318,1350}

1979/02/19 Use SIRS To Keep Service Literature Current{0374}

1979/02/05 High Sulfur Fuel Can Cause Severe Engine Wear And Internal Damage{1280}

1979/02/05 Stronger Suction Bell Assembly Now Used In Engine Oil Lines Group{1318,1307}

1979/02/05 Federal Law Prohibits Tampering With Noise Control Systems{0116}

1979/03/05 Improvements Made To Fuel Injection Pump And Governor Group{1253,1281,1286}

1979/03/05 New Oil Pan Assembly Uses An O-Ring And Plug For A Better Seal{1302}

1979/03/05 Engine Mounted Exhaust Brake Systems Can Be Used To Extend Service Brake Life{1050}

1979/03/12 New Larger Capacity Water Separator Is Available{1250}

1979/03/12 Retroreflective Tape Makes Phototach Kit Easier To Read{0651,0653}

1979/03/12 New Manifold Assembly Gives More Room For The Lifting Eye{1059}

1979/03/12 SAE 15W/40 Multiviscosity Oil Can Be Used In Engines, Transmissions And Final Drives{1318,3067,3179,4070}

1979/03/12 New Design Fuel Injection Valve Body Used In Fuel Injection Lines Group{1252,1254}

1979/03/12 Check Valve Must Be Adjusted Correctly To Let Fuel Flow Through The Return Line And Back To The Tank{1275,1253,1274}

1979/03/12 Larger Diameter Washer Is Used To Hold Air Transfer Pipe In Aftercooler Flange{1063,1058}

1979/03/12 Magneto Improvements{1413}

1979/03/12 New Fuel Injection Lines Groups Use A Different Fuel Injection Nozzle Assembly{1254}