1997/10/27 Caterpillar

History Of Pump Impeller (Water Pump) Changes{1364}

Usage:

3304 (5FG, 9CG, 4TJ, 78P, 2ER, 43V, 46V, 48V, 07Z, 09Z, 12Z, 59Z),
3306 (3LC, 8TD, 1TF, 2JG, 6KJ, 03N, 9BN, 44V, 47V, 49V, 08Z, 10Z, 13Z, 60Z, 62Z) Engines For Caterpillar Built Machines

Reference: See the Service Magazine article entitled "Significant Improvement For Pump Impellers (Water Pumps)" in this issue.

Several design changes have been made to the pump impeller (water pump) over the past few years in the above machine engines. The most current 134-7422 Pump Impeller is made of a black plastic.

For purposes of determining the original build design of the pump impellers for 3300 Engines built in Mossville, refer to the following serial number ranges in the charts:

NOTE: The effectivity in the chart is for machines with engines produced in Mossville only. Other effectivity is not available.

Caterpillar Information System:

1997/10/27 Significant Improvement For Pump Impellers (Water Pumps){1364}

1997/10/20 Service Interval Change For Extended Life Coolant Extender And Extended Life Coolant{1395,7543,7545}

1997/10/13 Follow Guidelines When Cleaning And Storing Friction Discs To Improve Service Life{3187}

1997/10/13 Possible Downloading Problem When Truck Payload Measurement V8.0 Is Used With Windows '95{7494}

1997/10/06 Proper Welding Procedure On Machines And Engines With Electronic Controls{1400}

1997/10/06 Service Charts And Decals Available{0374,0375}

1997/09/29 Handling Instructions For Water Pumps{1361}

1997/09/08 3406C Pump And Governor Changes Provide Improved Oil And Fuel Leak Resistence{7555}

1997/09/01 Improvement Provides Better Sealing For Unit Injectors {1290}

1997/08/25 New Parts Manual Format Used For Certain Caterpillar Products{0374}

1997/08/18 "Date Updated" Displayed In Parts Manuals On The Service Information System (SIS) {7567}

1997/08/18 Use Separate Sampling Pump For Oil and Coolant {7542,7577}

1997/11/03 Proper Welding Procedure On Machines And Engines With Electronic Controls {1400}

1997/11/10 Handling Instructions For Water Pumps {1361}

1997/12/22 Thicker Head Gasket Available For Cylinder Block Salvage Procedure {1124}

1997/12/22 Dry Lubricant Recommended For Use On Door Linkages, Door Seals, And Window Latches {7308}

1997/12/22 New Seat Slider Blocks Reduce Need For Adjustments {7312,7300}

1998/01/19 Machine Flash Software Ordered Through The Parts Distribution System Now Available Through Corporate Mail Box{1900,1920}

1998/01/19 Improved Alpha-Numeric SMCS (Service Management Control System) Component Codes Allow For Future Expansion Of System Categories{0374}

1998/01/19 Use 126-7175 Push Puller Assembly For Various General Purpose Applications{0600}

1998/01/19 Use 1U-9500 Flow Communicator On Caterpillar Diagnostic Tools{1250,0782}

1998/01/26 The 154-6732 Pump Kit Is Available To Help Service The Unit Injector Hydraulic Pump Group On 3408E (99C) And 3412E (80M) Machine Engines {1714}

1998/01/26 Be Sure To Correctly Tighten 1R-0712, 1R-0740, 1R-0749, 1R-0750, 1R-0751, 1R-0753, And 1R-0759 Fuel Filter Assemblies {1261}

1998/01/26 Caterpillar Electronic Technician (ET) Training Video Available {0374}