Application Changes For Electronic Unit Injector (EUI) Part Numbers
Usage:
3176 (2YG, 7LG) Truck Engines
Reference: This issue of Truck Engine News, "New Electronic Unit Injector (EUI) With New Style Solenoid Used; New Unit Injector Wiring Group Used ".
This issue of Truck Engine News, "New 9U6143 Power Supply Adapter Allow New Unit Injectors To Be Tested On 1U6661 or 6V4022 Pop Testers ".
The EUI part numbers used for each engine rating have changed. The change is in effect with 3176 Truck Engine 7LG7500. The change is concurrent with the change to the new 6I1532 Camshaft Assembly.
The EUI applications change as follows:
- 350 hp truck rating is a new rating effective with 7LG7500. this rating uses the 4P9510 EUI.
- 325 hp truck engine rating changes from the 4P9520 EUI to the 4P9510 EUI.
- 275 and 300 hp truck engine rating changes from the 4P9510 EUI to the 6I2870 EUI. See the Reference Articles.
- 250 hp truck engine rating is no longer available effective with 3176 Truck Engine 7LG7500.
- 325 hp truck engine rating changes from the 4P9520 EUI to the 4P9510 EUI.
An application chart for all current and formerly used 3176 engine EUI part numbers is included for reference.
Caterpillar Information System:
1992/08/01 New Electronic Unit Injector (EUI) With New Style Solenoid Used; New Unit Injector Wiring Group Used
1992/06/01 List of Service Publications
1992/06/01 Boxes/Cartons Containing Used Cores Should Be Immediately And Clearly Identified
1992/06/01 New Carrier Assembly Used In Governor And Fuel Pump Drive Groups
1992/06/01 Correction For Camshaft And Valve Seat Specifications
1992/06/01 New Diaphragm Used In Fuel Ratio Control Groups
1992/06/01 New Cylinder Heads Have Additional Coolant Passages
1992/06/01 New Training Material On 3306C And 3406C Truck Engines Available
1992/06/01 Centrifugal Lube Filter Group Available
1992/06/01 4P6493 Governor Information Plate Available
1992/05/01 Procedure for Cleaning an Engine Lubrication System when Contaminated with Engine Coolant Containing Antifreeze
1992/05/01 Bearings Available For Schwitzer Turbochargers
1992/08/01 Be Sure The Fuel Injection Pump Housing Is Compatible With 0R0715 And 0R2545 Remanufactured Short Blocks
1992/08/01 New "3406B Engine Instructor Manual " Available
1992/08/01 Supplemental Coolant Additive Requirements
1992/08/01 Reusability Of Exhaust Valves In All Caterpillar Engines
1992/09/01 New Plug And O-Ring Can Help Prevent Oil Leakage At The Flywheel Housing Gasket
1992/09/01 New Fuel Injection Pump Groups Have Larger Diameter Camshaft Bores, New Lifter Assembly, And Shorter Plunger And Barrel Assembly.
1992/09/01 Governor Specifications Are Available Through The Technical Information System
1992/09/01 Thicker Head Gaskets Available For Use With Resurfaced Cylinder Blocks
1992/10/01 Oil Holes In Crankshaft Main And Rod Journals
1992/10/01 3406 Truck Engine Component Update
1992/11/01 New Liner Seat Inserts Available
1992/11/01 New Cylinder Head Gasket, Spacer Plate And Head Bolts Used and New Cylinder Liner Projection Measurement Method