1996/10/01 Caterpillar

New O-Ring Seals Used On "Through-Head-Adapter" And "Internal Fuel Lines" In Fuel Injection Lines Groups{1252}

Usage:

3406 (3ZJ61791-Up, 5KJ8237-Up, 8PN10350-Up) Truck Engines

Description of Change: New O-ring seals (1) and (2) are used on the "through-head-adapters" (B) and "internal fuel lines" (C) in the fuel injection lines groups on these truck engines. The new O-ring seals have increased resistance to heat damage.

Location of new 132-2072 O-Ring Seal (1) and 8L-2779 O-Ring Seal (2) in a typical fuel injection lines group. Cylinder Head (A). Through-Head-Adapter (B). Internal Fuel Line (C).

Adaptable To: The new 132-2072 O-Ring Seal (1) is a direct replacement for the former 8M-4437 O-Ring Seal on the "through-head-adapters" (B) and the new 8L-2779 O-Ring Seal is a direct replacement for the former 1H-1023 O-Ring Seal on the "internal fuel lines" (C) in the fuel injection lines groups on these truck engines.

The new O-ring seals are in effect as listed in the subtitle and can be used to replace the former O-ring seals on all earlier 3406, 3406B and 3406C Truck Engines.

Caterpillar Information System:

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}

1996/09/01 New Hold-Down Bolts For The Sleeve Metering Fuel System (SMFS) Governor Housing {1251}

1996/09/01 New Improved Camshaft Assemblies Are Used In 3208 Truck Engines {1210}

1996/09/01 New Lifter Assembly Is Available For Turbocharged Engines {1209}

1996/10/01 Improved Water Pump Groups Available{1361}

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}

1996/11/01 Fuel Injection Pump Bushings Have New Groove Adjacent To Load Ring {1251}

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}