1979/03/14 Caterpillar


New Engine Cylinder Block Used

Usage:




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

Description of Change: A new cylinder block is used on the above engines starting with the serial numbers shown. The main bearing cap joint (junction) angle has been changed from 150° to 160°. This change makes the main bearing joint more rigid and puts less side stress on the block than before.

Adaptable To: A new 9N3763 Cylinder Block-Service Group is available and is a direct replacement for the former 9N1255 Cylinder Block-Service Group which has been canceled. In addition, a new 9N5190 Cylinder Block-Short is available and is a direct replacement for the former 9N2139 Cylinder Block-Short which has been canceled. Also, a new 9N3759 Service Bearing Cap is available for parts service of the new cylinder block. The 9L8992 Bearing Cap is still available for parts service of the former cylinder block.

Caterpillar Information System:

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
1979/03/07 New Exhaust Valve And Valve Guide
1979/03/14 Improvements Made To Fuel Injection Pump And Governor Group
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
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