1997/01/20 Caterpillar

Improved Multi-Row Modules (IMRM) Used In Caterpillar Radiators Have Different Designs {1353}

Usage:

Caterpillar Machines Equipped With IMRM Radiator Core Assemblies

Because of dual sourcing of suppliers IMRM (radiator core assemblies) have significantly different construction in the above machines powered by 3114/3116/3126/3204/3304/3306/3406/3406C Engines.

Illustration 1. IMRM radiator core designs, with the same part number. Soldered/ceramic coated inside (left view), welded tubes/soldered (right view).

Illustration 2. IMRM radiator core designs with the same part number. Notice the differences in the tube size/arrangement, core outside dimensions and welded construction of the mini-tanks. The fin spacing (nine fins per inch) and the snout dimensions and the cooling performance are the same.

NOTE: Though the construction is different from supplier to supplier, the performance of the IMRM is the same.

Caterpillar Information System:

1997/01/20 New Remanufactured Water Pump Groups Include Cast Iron Impellers {1361}

1997/01/20 Methods Of Obtaining Engine Flash Files {1902}

1997/01/20 VIMS-PC Service Tool Operating System Environment Answers {7601}

1997/01/20 A Port Now Provided In The Engine Oil Filter Group For Scheduled Oil Sampling (S.0.S.) {7542,1306,1051}

1997/01/20 Dump Body Mounted Mud Deflectors (Mud Flaps) Are Available To Prevent Mud From Being Thrown On The Back Of The Tractor {4220}

1997/01/20 Improved Bearings Used In Output Transfer Gear Group {3159}

1997/01/20 New Check Valve Group And Larger O-ring For Load Monitoring System Eliminates O-ring Interference {5067,7200}

1997/01/20 Increased Tightening Specification Improves Retention Of Thrust Washer Screws In Final Drive {4051}

1997/01/20 New Ether Starting Aid Groups Include Flexible Hose Assemblies Instead Of Tube Assemblies {1456}

1997/01/20 Modification Of Electronic Control Module (ECM) Controlled Variable Speed Fan Clutch Bracket-Shaft Assembly For Easier Fan Speed Sensor Removal {1359}

1997/01/20 "E-Trim" Unit Fuel Injectors {1290}

1997/01/20 Special Edition, SEPD0325, "Major Improvements And Service Information For 768C, 772B, 776C, 776D Tractors, 771C, 771D, 775B, 775D Quarry Trucks And 769C, 769D, 773B, 773D, 777C And 777D Trucks" Is Available {0374}

1997/01/27 Charcoal Air Filter Available Reduces Odors From Outside Air {7309,7320,7342}

1997/01/27 Improved Procedure For Preloading Final Drive Bearings Now Available {4050,4059}

1997/01/27 An Improved Adjustment Procedure For The Steering Console Cylinder Eliminates Steering Console Drift {4300,5258}

1997/01/27 Special Instruction, REHS0033, "Assembly Procedure For 777D Truck Body" Is Available {0374,7258,7960}

1997/01/27 New Temperature Sensor For Differential Improves VIMS Data Accuracy {3290,7601}

1997/01/27 New Shield In The Exhaust Shield Group Gives Improved Service {1067}

1997/01/27 New Pressure Switch Assembly Available To Allow The Jake Brake To Release At Low Engine Speed {1119}

1997/01/27 Installation Of The Parts Service 7N-3542 Core In The Basic Radiator Assembly {1353}

1997/01/27 New Hose Assembly Improves Hose Routing And Prevents Damage Due To Contact With Steel Tubes {3154}

1997/01/27 New Hoist Control Lever And Handle Improves Operator Comfort {5063}

1997/01/27 New Parts Service Pad And Shim Replaces The Buffer In The Dump Body Group {7258}

1997/01/27 Parts Service Block Replaces Nuts To Provide Better Bolt Retention For The Spillplate Assembly In The Body Group {7258}