Fuel Injection Pump Bushings Have New Groove Adjacent To Load Ring {1251}
Usage:
3406 (92U),
3406B (7FB, 8TC, 4MG, 3ZJ1-16181, 5KJ1-7799, 2EK, 4CK1-845),
3406C (3ZJ16182-Up, 5KJ7800-Up, 4CK846-Up, 8PN) Truck Engines
A manufacturing process change has resulted in a new groove in the bottom of the 113-7794 and 7C-6617 Fuel Injection Pump Bushings (A). The manufacturing process change reduces bushing dimensional variations. The new groove (C) is adjacent to and outside of the load ring (B). The new groove is NOT a quality defect.
Illustration 1. Location of 113-7794 and 7C-6617 Fuel Injection Pump Bushings (A) in typical fuel injection pump group.
Illustration 2. Location of new groove (C) next to load ring (B) on 113-7794 and 7C-6617 Fuel Injection Pump Bushings (A).
Caterpillar Information System:
1996/11/01 Improved Fuel Pump Plunger Helps Prevent Plunger And Sleeve Scuffing In Service 8.5 mm Fuel Injection Pump Assembly For Sleeve Metering Fuel System (SMFS) Governor And Fuel Injection Pump Groups{1251,1286}
1996/10/01 Improved Water Pump Groups Available{1361}
1996/10/01 New O-Ring Seals Used On "Through-Head-Adapter" And "Internal Fuel Lines" In Fuel Injection Lines Groups{1252}
1996/10/01 Procedure For Installing Steel Core Gasket At The Front Housing And The Flywheel Housing{1151,1157,1162}
1996/10/01 New Torque Specification For Injector Rocker Arm Adjustment Lock Nut{1123}
1996/10/01 An Improved O-Ring Seal And Proper Use Of Adapter Locks Reduces Oil Leaks{1252}
1996/09/01 New Control Group Does Not Have An Oil Pressure Sensor And Requires Installation Of A Sensor Kit {1904,1924}
1996/09/01 New Governor Weight And Race Increase Durability {1264}
1996/09/01 Use Two Piece Ferrous Articulated Pistons Instead Of Aluminum Pistons {1214,1331}
1996/09/01 New Parts Available To Eliminate Wear Between The Oil Cooler Bonnet And The Elbow {1378,1380}
1996/09/01 New Plastic Outlet Sleeve Used On 3208 Engines {1380}
1996/09/01 Water Temperature Regulators (Low Leak) Adaptable To 3208 Truck Engines {1355}
1996/12/23 Check Turbocharger Seals If There Is A Sudden Increase In Crankcase Blowby{1052,1317}
1996/12/23 July 1996 Software Release{1902}
1996/12/23 New Thinner Exhaust Manifold Gasket Used{1059}
1996/12/23 New Oil Supply And Drain Lines In Turbocharger Oil Lines Groups Used With "Mid-Mount", "New Mid-Mount", And "Low Mount" Arrangements{1307}
1997/01/27 New Remanufactured Water Pump Groups Include Cast Iron Impellers{1361}
1997/01/27 Description Of August 1996 (AUG96) Software Modifications{1902}
1997/01/27 Points To Remember When Replacing A Viscous Crankshaft Damper Assembly With A Rubber Crankshaft Damper Assembly{1205}
1997/01/27 Timing Procedure Aid -Alignment Of Timing Gear Marks On 3406 Engines{1206}
1997/01/27 New Gasket Used Between Air Compressor And Front Housing{1803}
1997/02/24 New O-Ring Seal Used In Hydraulically Actuated Electronic Unit Injector (HEUI) Pump Group{1714}
1997/02/24 New Specifications For Pressure Drop Across The Air-To-Air Aftercooler{1063}
1997/02/24 Improved Bushing O-Ring Seal Available For Injection Pump Groups{1251}