1981/09/07 Caterpillar

New Exhaust Gas Recirculation Solenoid Used{1080}

Usage:

3208 Truck Engines ( 32Y, 40S)

Description of Change: A new exhaust gas recirculation (EGR) solenoid and a new fuse are used on the above 3208 Truck Engines. The new solenoid needs less input voltage to work. Voltage drops (reductions) in the electrical system had a greater effect on the former solenoid, because it operated at a higher voltage.

The new EGR solenoid needs a 6 amp fuse for correct operation. Formerly, a 4 amp fuse was used.

Adaptable As: The new 3T5445 (EGR) Solenoid Assembly and 3T5802 Fuse are direct replacements for the former 9N2508 (EGR) Solenoid Assembly and 7N472 Fuse.

It is Caterpillar's recommendation that the new solenoid be used when a replacement is needed. The new 6 amp fuse can also be used with the former solenoid.

Caterpillar Information System:

1981/09/07 Use Hardware Rack To Keep Small Parts Together During Engine Disassembly And Assembly{0633}

1981/09/07 Plates Can Be Fabricated For Removal Of Spherical Bearings From Hydraulic Cylinders{0651,0623}

1981/09/07 Use Correct Parts In Oil Pressure Relief Valve{1315,1304}

1981/08/31 Thrust Washer Used In Pump Housing For Sleeve Metering Fuel System{1253,1286}

1981/08/31 6V3100 Diesel Timing Indicator Group Available To Check Engine/Fuel System Timing And Mechanical Advance During Operation{0653,1206,1156}

1981/08/31 FT1632 Bolt Used During Removal Of Sleeve From Sleeve Metering Fuel System{0621,1251,1253}

1981/08/24 Use Of Different Anti-Seize Compound Prevents Problems With S.O.S. Tests{0680,1203,1218,1219,1225,1226,1227,1230}

1981/08/24 Troubleshooting The Fuel Ratio Control Group For Low Power Complaints{1278}

1981/08/24 New Idler Pulley Groups Improve Service Life Of Vee-Belt{1358}

1981/08/17 Comparison And Applications Of Six And Eight Counterweight Crankshafts{1202,1156}

1981/08/17 O-Ring Seal Materials And Applications: Use Only The Correct Seal For The Specific Installation{7555}

1981/08/17 Plastic Plugs Now Used To Hold Piston Pins In Bendix Air Compressors{1065}

1981/09/07 One-Piece Panel Used For Oil Pan Sound Suppression{7260,1801,1302}

1981/09/07 New Support Prevents Vibration Of Left Side Oil Filters{1306,1318}

1981/09/14 New High Pressure Quick Disconnect Couplers And Nipples For Hydraulic Test Equipment {0651}

1981/09/14 Updated, Improved Issue of Special Instruction, "Bench Testing Hydraulic Components," Now Available {0374,5050}

1981/09/14 Changes To BrakeSaver Groups Give Longer Service Life {1155}

1981/09/14 Troubleshooting: Water Pump Failures {1361,1350}

1981/09/14 Exhaust Manifold And Air Lines Changes Prevent Broken Studs And Exhaust Leaks {1059,1061}

1981/09/14 Timing Pin Removed From Governor And Fuel Injection Pump Group; Change To Service Manuals {1286}

1981/09/14 Low Idle Instability: New Low Idle Setting {1264}

1981/09/14 Spring Pins No Longer Used In Water Pump Drive Gear {1361}

1981/09/21 Preventive Maintenance For Natural Gas Engine Spark Ignition System{1550,1552,1555,1558}

1981/09/21 New Dual Speed Switch Is Now Available{7418,7410,7411,1400}