1979/03/14 Caterpillar

Improvements Made To Fuel Injection Pump And Governor Group


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:

1979/03/14 New Engine Cylinder Block Used
1979/03/14 New Fuel Injection Nozzles Are Used In 3208 Engines
1979/03/14 New Piston And Connecting Rod Are Tapered In Area Of Piston Pin
1979/03/14 New Oil Filter And Filter Base Assemblies
1979/03/07 New Exhaust Pipe Connector Makes A Tighter Seal Between Pipe And Manifold
1979/03/07 Retroreflective Tape Makes Phototach Kit Easier To Read
1979/03/07 Window Cover Kit Now Available For ENM Service Meters
1979/03/07 Use SIRS To Keep Service Literature Current
1979/03/07 Check Valve Must Be Adjusted Correctly To Let Fuel Flow Through The Return Line And Back To The Tank
1979/03/07 New Fuel Injection Lines Groups Use A Different Fuel Injection Nozzle Assembly
1979/03/07 Engine Valve Springs Are Now Made Of Carbon Steel Alloy
1979/03/07 New Manifold Assembly Gives More Room For The Lifting Eye
1979/03/14 8L4525 Flange Is Available Again For Parts Service Of 3192 Marine Transmissions
1979/03/14 Main Bearings Now Have Larger Diameter Oil Hole For Better Lubrication Of Main And Rod Bearings
1979/03/14 Maintenance Procedures For Extended FPTO Life On 3408 And 3412 Marine Engines
1979/03/14 Larger Diameter Washer Is Used To Hold Air Transfer Pipe In Aftercooler Flange
1979/03/14 List Of Service Publications
1979/03/14 Revision To Guideline For Reusable Parts Is Available
1979/03/14 Information About The Use Of Earlier Cylinder Heads And Liners With Spacer Plate Cylinder Blocks; List Of Earlier Articles
1979/03/14 Replacement Bushing Available For Cast Iron Rocker Arms Only
1979/04/04 New Fabricated Tools Available For Service Work On 7211 And 7221 Marine Transmissions
1979/04/04 New Oil Jet Tube In Cylinder Block Gives More Clearance For Pistons And Connecting Rods
1979/04/04 Four Crankshaft Rear Seals Are Available For Use On 3304 And 3306 Engines
1979/04/04 List Of Service Publications
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