1993/04/12 Caterpillar

Fan Drive Pulley Group Components{1359}

Usage:

3400 Industrial And Generator Set Engines Equipped With Folded Core Radiators

This article replaces the article with the same title on Page 10 of the March 8, 1993 issue of Service Magazine.

Occasionally there is a desire to change fan drive pulley ratios. The fan drive pulley groups for the 3400 Industrial and Generator Set Engines offer several pulley ratios for each engine/radiator combination. The proper ratio is selected based on the cooling requirements and fan diameter. The crankshaft pulley that comes as part of the basic engine arrangement is used in six of the fifteen pulley groups that are offered. The other pulley groups use non-standard crankshaft pulleys.

The drive group ratios that use the standard crankshaft pulley do NOT call out the pulley in the group. Therefore, the wrong ratio can occur when changing from a non-standard crankshaft pulley, because non-standard crankshaft pulley might get reused instead of replaced with the standard crankshaft pulley. The charts that follow can help eliminate confusion and errors.

Chart A identifies the Pulley Groups, Fan Drive Ratios, and pulley group components for 3406 Engines. Chart B identifies the Pulley Groups, Fan Drive Ratios, and pulley group components for 3408 and 3412 Engines.

Caterpillar Information System:

1993/04/12 New Personality Modules Provide Improved Cruise Control{1902}

1993/04/12 Component Cross Reference Lists For Programed Electronic Engine Control (PEEC) And Electronic Systems{1900}

1993/04/12 7L4095 Exhaust Manifold Available For Parts Service{1059}

1993/04/12 Seal Kits Are Now Available For Balderson Hydraulic Hammers{6300,6333}

1993/04/05 Alternator Mounting Modifications{1405}

1993/04/05 New Alternator Support Bracket Used In Alternator Mounting Group{1405}

1993/04/05 Oversize Pistons Not Available{1214,1216}

1993/03/29 New Exhaust Manifold Group With Spring Energized Seals Between Cylinder Head And Manifold; New Exhaust Elbow And Seals In Air Lines Group{1059,1061,1052}

1993/03/29 Aftercooler Group Changed To Provide Stronger Housing{1063}

1993/03/29 Personality Modules Available For Bulk Hauler Applications{1902}

1993/03/29 Corporate Key Start Switch Has Improved Action{1400}

1993/03/22 New Piston And Rod Group Has Lower Top Ring Position And Improved Ring Groove Cooling{1225}

1993/04/12 New Seal Group Used In Water Pump Groups{1361}

1993/04/12 Adjustment Of 60670 Idle Air Lines Group (Idle Bleed Circuit){1266}

1993/04/12 New Expansion Tank Assembly Used In Expansion Tank Groups{1354}

1993/04/12 New Damper Guard Group Used{7150}

1993/04/12 New Bearing Assemblies Used On Main Shaft{3322}

1993/05/03 Governor Control Adjustment {1264}

1993/05/10 Service Tips For Effective Repair Of Failed Turbochargers{1052,1063,1059}

1993/05/10 0R3735 Remanufactured Camshaft Available{1210}

1993/05/10 New Low Crevice Volume (LCV) Piston Body Assembly Used{1214}

1993/05/17 Baffles Available To Help Reduce Turbocharger Noise {1052,1058}

1993/05/17 New Fuel Injection Lines, Clamps, And Brackets Used In Fuel Injection Lines Groups {1252}

1993/05/24 Summary Of Changes To Timing Advance Drive Groups{1272}