1979/03/05 Caterpillar

Improvements Made To Fuel Injection Pump And Governor Group{1253,1281,1286}

Usage:

3208 Industrial (90N37285-Up),
Marine (75V4002-Up),
Vehicular (79V5380-Up) and Truck (32Y1-Up) Engines

Description of Change: Several improvements have been made to the fuel injection pump and governor group for 3208 Engines with the serial numbers shown above. A new fuel pump housing assembly that has larger guide pins for the lifters is used. In addition, a new fuel pump camshaft and new lifters are used.

The new fuel pump camshaft makes the lifters move up faster. This causes a faster fuel injection rate. The faster injection rate will give less emissions. The new lifters are .025" (.635 mm) shorter than the former lifters. The new guide pins have a .125" (3.18 mm) diameter, which is larger than the former guide pins.

Adaptable As: The new pump housing with special lifters is directly adaptable to earlier engines.

When a new 9N3754 Pump Housing Assembly is used with the former 9L6542 Fuel Pump Camshaft, eight new 8N1317 Lifters are needed. The new 8N1317 Lifter is the same length as the former lifter, but has a wider groove than the former lifter. The former 8N977 Guide Pins are still available for parts service of the former 9N2436 Pump Housing Assembly and can be used with the 8N1317 Lifters.

The former 9L6542 Camshaft must not be used with the later engines shown above. The use of this 9L6542 Camshaft with these later engines will have an effect on emission levels and change the fuel rate.

Caterpillar Information System:

1979/03/05 New Fuel Injection Nozzles Are Used In 3208 Engines{1254}

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}

1979/03/05 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}

1979/03/19 Maintenance Procedures For Extended FPTO Life On 3408 And 3412 Marine Engines{3055}