Engine Valve Springs Are Now Made Of Carbon Steel Alloy{1101,1108}
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:
1979/02/19 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}
1979/01/29 Fuse And Wire Assembly Is Available For Protection Of Earlier 6N5906 Service Meters{7480}
1979/01/22 Ether Starting Aid Groups Are Now Available{1456}
1979/01/22 New Tachometer Drive Adapter Has Increased Service Life{7462,1288}
1979/01/22 Current Chart For Dynamometer Adapters{0651,1000}
1979/03/05 Main Bearings Now Have Larger Diameter Oil Hole For Better Lubrication Of Main And Rod Bearings{1203,1219,1300}
1979/03/05 New Engine Cylinder Block Used{1201}
1979/03/05 New Piston And Connecting Rod Are Tapered In Area Of Piston Pin{1213,1214,1218,1219}
1979/03/05 New Fuel Injection Nozzles Are Used In 3208 Engines{1254}
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}