1991/05/27 Caterpillar

New Fuel Manifolds And Clamps Reduce Vibration Of Fuel Lines{1252,1702}

Usage:

3508, 3512, 3516 Industrial, Generator Set, Marine, And Vehicular Engines

Reference: Service Magazine; May 1, 1989, Page 9, "New Fuel Manifolds Changed To Steel."

Description of Change: New fuel manifolds have thicker tube walls along with new clamps with rubber grommets. Also, the fuel lines that cross the front of the engine are secured with new rubber-grommet clamps. The thicker wall tubes reduce vibration levels and the ends of the manifolds. Mounting the manifolds and crossover fuel lines with the new clamps helps to isolate them from vibration.

Adaptable To: The new manifold and fuel line clamps are effective with serial numbers listed in Chart A.

The new fuel manifolds and other new parts are listed in Chart B. The new manifolds can be installed on earlier engines.

Caterpillar Information System:

1991/05/27 Smaller Connecting Rod Bolt Used In 4W6425 Air Compressor; Use Correct Torque{1803}

1991/05/27 Technical Marketing Information (TMI) System for Commercial Engine Products{0337,0334,0336}

1991/05/27 Expected Future Air Conditioning Service Requirements{7320,1802}

1991/05/20 Correct Testing of Sensing Switches{7400,7402,7422}

1991/05/20 New Speed Setting Clutch Group For 3161 Woodward Governors{1265}

1991/05/20 Two Scavenge Screens Now Used In Scavenge Oil Pumps{1312}

1991/05/20 Replace Camshaft And Install New Lifters If Pitting, Spalling, Or Wear Occurs On Lobes Of 4N0599 And 4N0602 Camshafts In Fuel Injection Pump Groups{1251,1253}

1991/05/20 Procedure To Retain Oil Pump When Pump Mounting Pad On Cylinder Block Is Broken{1201,1304}

1991/05/20 Cylinder Kits Not Recommended For Use In 3400 Family of Marine Engines And D8N Tractors{1214}

1991/05/20 Do Not Weld Repair Worn Wheel Spindles For Off-Highway Trucks Or Wheel Tractor-Scrapers{4002,4205,4234}

1991/05/13 Unwanted Engine Shutdown Caused By "01" And/Or "04" Diagnostic; New "09" Diagnostic Available With 8T9881-8 Electronic Control Module (ECM){4490}

1991/05/13 Engine Updates Help Prevent Piston Seizures{1214,1252,1265,1274,1355,1383,1393,1456}

1991/06/03 New Deutsch HD-10® Electrical Connectors Used{1400,1408}

1991/06/03 Reference Emissions Graph Helps Determine Oxides Of Nitrogen{1050}

1991/06/03 New Oil Drain Assembly Used; Be Sure To Correctly Tighten Drain Plugs, Port Plugs, And Pipe Plugs In Oil Pans{1302}

1991/06/10 New Timing Specifications For 3500 Spark-Ignited Engines{1552}

1991/06/10 1,1,1-Trichloroethane May Damage Deutsch C-E Electrical Connectors{1400,0645,0785,1450,1550,1900,3168,3225,3418,4294,4323,4450,5485,5700,7400,7450}

1991/06/17 New Three-Ring Pistons And New Rings Used In New Piston And Rod Groups To Provide Improved Oil Control{1214,1215}

1991/06/17 New Seal And Improved Plate Eliminate Leaks In BrakeSaver Water Lines Group{1380,1155}

1991/06/17 Personality Modules For 1991{1902}

1991/06/17 New Gasket Used In Flywheel Housing Cover Group{1157}

1991/06/17 New Top Piston Ring Improves Wear Resistance{1215}

1991/06/24 Air Starter Relay Valve Improved{1462}

1991/06/24 New Flame Arrestor Assembly Used In Flame Arrestor Group{1050}