Engine Valve Springs Are Now Made Of Carbon Steel Alloy
Usage:
1100 and 3100 Series Engines;
3204 and 3208 Engines
Description of Change: The engine valve springs used in the above models are now made of a different steel alloy than the former valve springs. The new valve springs are made of a carbon steel alloy and will give longer service life than the former springs.
Adaptable As: The new 9N3617 Valve Spring is a direct replacement for the former 9N3387 Valve Spring which is canceled.
Caterpillar Information System:
1979/03/07 New Manifold Assembly Gives More Room For The Lifting Eye
1979/03/07 High Sulfur Fuel Can Cause Severe Engine Wear And Internal Damage
1979/03/07 New Larger Capacity Water Separator Is Available
1979/03/07 Stronger Suction Bell Assembly Now Used In Engine Oil Lines Group
1979/03/07 Federal Law Prohibits Tampering With Noise Control Systems
1979/01/24 List Of Service Publications
1979/01/24 Longer Bolts Are Now Used To Fasten The Engine Fan Assembly To The Adapter
1979/01/24 5P9705 Tapered Rod Tool Group Used For Removal And Installation Of Piston Pin Bearings In Tapered Connecting Rods
1979/01/24 Current Chart For Dynamometer Adapters
1979/01/24 Ether Starting Aid Groups Are Now Available
1979/01/24 A New 6V29 Sleeve Metering Fuel System Pump Roll Pin Tool Is Used To Adjust And Make A Replacement Of Roll Pins In The Fuel Injection Pump Housing
1979/01/10 Caution: Do Not Change Orifice In Water Outlet Of Auxiliary Pump Group
1979/03/07 New Fuel Injection Lines Groups Use A Different Fuel Injection Nozzle Assembly
1979/03/07 Use SIRS To Keep Service Literature Current
1979/03/07 Retroreflective Tape Makes Phototach Kit Easier To Read
1979/03/07 New Exhaust Pipe Connector Makes A Tighter Seal Between Pipe And Manifold
1979/03/14 New Oil Filter And Filter Base Assemblies
1979/03/14 New Piston And Connecting Rod Are Tapered In Area Of Piston Pin
1979/03/14 New Fuel Injection Nozzles Are Used In 3208 Engines
1979/03/14 New Engine Cylinder Block Used
1979/03/14 Improvements Made To Fuel Injection Pump And Governor Group
1979/03/14 Main Bearings Now Have Larger Diameter Oil Hole For Better Lubrication Of Main And Rod Bearings
1979/03/14 List Of Service Publications
1979/03/14 Revision To Guideline For Reusable Parts Is Available