1994/10/01 Caterpillar

Remanufactured Crankshaft Interchangeability; Remanufactured "Upgrade To New" (UTN) Availability {1202}

Usage:

3500 Family Of Commercial Engines

Reference: Engine News, April 1991, Page 1, "New Cylinder Blocks And Crankshafts Used". Engine News, September 1991, Page 2, "New Cylinder Block And Crankshaft Used". Engine News, July 1993, Page 8, "New Crankshafts With Induction Hardened Fillets".

The Reference Articles identify new, remanufactured, and UTN crankshafts and which cylinder blocks these crankshafts can be used in. As a reminder, the former crankshafts can be used in later cylinder blocks, so if the later crankshafts are not available, Caterpillar recommends the former crankshaft be used if available.

For All Remanufactured Upgrade To New (UTN) Crankshafts

It is important to understand when checking the availability of any UTN crankshafts, that Caterpillar's normal practice is not to stock the UTN crankshafts under the UTN part number. Therefore, if a dealer checks availability of the UTN crankshaft, he will find zero on hand. The normal practice is to stock new crankshafts. When an order is received for a UTN crankshaft, a new crankshaft is shipped as a UTN crankshaft. So, to check availability of the UTN crankshaft, check availability of the new crankshaft. If a new crankshaft is available, then a UTN crankshaft is also available.

Caterpillar Information System:

1994/10/01 Longer Inch Cylinder Head Bolt Provides Increased Thread Engagement {1100}

1994/10/01 New Spark Plug Tightening Specifications For Engines With Canadian Standards Association (CSA) Ignitions {1550}

1994/10/01 New Governor Control Assembly to Improve Acuator Stability {1289}

1994/10/01 Adjustment Of Air/Fuel Ratio Control Setting {1278}

1994/10/01 New Engine Crankshaft Rubber Damper Assembly Uses Improved Rubber Material {1205}

1994/10/01 Fuel Priming Pump Can Be Installed On Either Left Or Right Side Service Fuel Filter Groups {1258}

1994/10/01 New Rear Crankshaft Seal Groups Available {1161}

1994/09/01 Different Emergency Stop Push Buttons for Electronic Modular Control Panel II (EMCP II) {4490,4450}

1994/09/01 Reworking Diesel And Gas Cylinder Heads On 6.25 Bore V Engines {1101}

1994/09/01 New Rear Camshaft Segments With Stronger Camshaft Flange Used {1210}

1994/09/01 Use Thread Lock On Bolts That Fasten Aftercooler Housing To Cylinder Block {1063}

1994/09/01 Turbocharger Turbine Nozzle Reusability Information {1052}

1994/10/01 New Higher Capacity Oil Pump Used {1304}

1994/10/01 New Gas Pressure Regulator Assembly Used To Provide Increased Parts Commonality {5503}

1994/10/01 New 106-7408 Engine Oil Film (Decal) Available {7557}

1994/10/01 New Intake Valve Lash Setting {1105}

1994/10/01 New Prechamber Assembly Used In Prechamber Group; New Specifications For Prechamber Group {1106}

1994/10/01 Repair Kit Is Available For Long Stroke Fuel Ratio Control Group Used With 3161 Governors {1278}

1994/10/01 Procedure For Tightening 067-9921 Tee In 9Y-3300 Prelube Pump Oil Lines Group {1307,1319}

1994/10/01 Additional Clamps Added To Air Cleaner Adapter Group For G3600 Engines {5502}

1994/10/01 Tightening Specification for Combustion Sensor {1900}

1994/10/01 Caterpillar Legendary Service Literature Catalog SELD0811 Updated {0374}

1994/11/01 Verification of Connecting Rod Eye Bushing Retention When Overhauling Engines{1218}

1994/11/01 3054 And 3056 Commercial Engine Fuel Injection Pump Service{1251}