1996/02/26 Caterpillar

Engine Coolant Loss And/Or Overheating Can Be Caused By Incorrect Shunt Line Connection{1380}

Usage:

3406 Truck Engines

Be sure the shunt line connection between the top of the radiator and the water pump inlet is correct. An incorrect shunt line connection can result in a lose of engine coolant and/or engine overheating. See the illustration. Be sure the shunt line is connected at either location (2), (3), or (4). Location (2) is preferred, but locations (3) and (4) are acceptable alternates. Location (4) is in the line between the radiator outlet and the inlet in the water pump cover. Be sure the shunt line is NOT connected at location (1). The use of location (1) may result in engine coolant loss and/or engine overheating.

(RIGHT SIDE VIEW OF ENGINE - TYPICAL WATER LINES GROUP) Coolant Outlet (A). Water Pump (B). Coolant Inlet (C). Oil Cooler (D). Locations (2), (3), and (4) are acceptable locations for the shunt line connection. Location (1) should NOT be used of the shunt line connection.

Caterpillar Information System:

1996/02/26 Troubleshooting Information For Horton Diesltemp© Fan Clutches{1359}

1996/02/26 New Oil Pan Resists Cracking{1302}

1996/02/26 Modification For 9U-7256 Guide Assembly (Camshaft){1210,0701,0702,0703}

1996/02/26 New Material Used In O-Rings And Optional New Block Side Cover Replacement{1201}

1996/02/26 New Engine Cylinder Head Injector Sleeve Used In Both Mechanical Unit Injection (MUI) And Hydraulic Electronic Unit Injection (HEUI) Engines{1125}

1996/02/26 Lubricant Used On Cylinder Head Bolts Changed{1100}

1996/02/26 Fuel Injector Sleeve Replacement Tooling{0703,1125}

1996/02/26 New Engine Information Plates Require More Information{1000}

1996/01/23 Basic Electronic Troubleshooting Guide Is Now Available{1900}

1996/01/23 False Logging Of Engine Retarder Diagnostic Codes{1900,1901,1119}

1996/01/23 Corrupted Fleet Trip Data{1900}

1996/01/23 Remanufactured Product Update{7754}

1996/02/26 New Speed/Timing Sensor {1912}

1996/03/27 Possible Sources of High Crankcase Blowby From Breather Tube{1317}

1996/03/27 New Jake Brake Slave Piston Lash Setting{1119}

1996/03/27 False Logging Of Cylinder Fault Codes While Using The Engine Retarder{1900,1901,1119}

1996/03/27 Uprateability Improvements{1902}

1996/03/27 Personality Module Covers On Electronic Control Modules (ECM'S){1902}

1996/03/27 Electronic Changes And Features{1901}

1996/03/27 Camshaft Conversion Kits Available{1110}

1996/03/27 Improvements To Camshafts, Unit Injector Rocker Arms, And Valve Rocker Arms{1123,1210}

1996/03/27 Fuel Injection Pump Barrel Sealing Face Reconditioning{1251}

1996/03/27 Fuel Injection Nozzle Reference {1254}

1996/04/19 New Star-Burst Perforated Steel Core Exhaust Manifold Gasket Provides Longer Service Life{1059}