1998/05/04 Caterpillar

Improved Alternator Groups Now Available{1405}

Usage:

Machines And Engines Using 121-4134, 121-4135, 117-1379, 125-9597, 107-7977, And 132-2156 Alternator Groups

Reference: Service Manual Mode; SENR4757-01; System Operation Testing And Adjusting, Delco Remy 21-SI Series Alternators; October 1997.

Description of Change: Improved alternator groups are now available which use an improved rear bearing.

Adaptable To: The improved 121-4134, 121-4135, 117-1379, 125-9597, 107-7977, and 132-2156 Alternator Groups are manufactured 2 February 1998 and later. The date code format for the alternator groups is YYMDD, where YY=year (i.e, 98), M=month code, and DD=day of the month (01-31). The month code is shown in Table 1. For example, 98B02 describes the alternator group produced on the 2nd of February, 1998.

Caterpillar Information System:

1998/03/30 Use 136-3642 Crimp Tool Group For 4C-9900 And 6V-4900 Presses {5057}

1998/03/30 Use 1U-6189 Lamp Tool For Removal And Installation Of Small Control Panel Bulbs {1400,0709}

1998/03/30 Use Measuring Tools For Crimp Diameter {0700}

1998/03/30 Use 137-2700 Bore Welding Group (110V), 138-8215 Bore Welding Group (110V With Auto-Skip), 138-8212 Bore Welding Group (220V) And 138-8213 Bore Welding Group (220V With Auto-Skip) For Building Up Worn Or Damaged Bores {0672}

1998/03/30 Use 9U-6803 Tester For Hydraulic Cylinders {7562}

1998/03/30 Use 7X-1703 Adapter Group For Mounting 7X-1700 Communication Adapter On 8T-8697 ECAP {1900,0781}

1998/03/30 Use Calibration Tools To Set, Test, And Adjust Heavy Sleeve Metering Fuel System {1250,1251}

1998/03/23 Replacements Products Available For 4C-4079 Brake And Component Cleaner{0680}

1998/03/23 Use 143-6092 Pressure Meter To Measure Differential, Static, And Peak Pressures In Hydraulic Systems{3000,4100,4112,4351,5050,5070,5450,5454,0727}

1998/03/23 Replacement Available For 7M-7260 Liquid Gasket{0648,0649,0651}

1998/03/23 Use 142-5055 Insulation Tester Group To Measure And Check Insulation Resistance{4450,0785}

1998/03/23 Use 152-2067 Differential Pressure Gauge To Monitor Aftercooler Pressure Drop In Applications With Crankcase Fumes Recirculation{1063}

1998/05/04 ROPS Instruction Film Available Through Parts Service{7177,7405}

1998/05/11 New Engine Lifter Arm Assembly With Crowned Roller Used In Lifter Groups {1209}

1998/05/18 Entertainment Radios Improved With Increased Reliability {7338}

1998/05/25 New Valve Cover Seal Used {1107}

1998/06/01 Proper Checking For Refrigerant Leaks Ensures Maximum Service Life Of Refrigerant Compressor {1802,1809,7320}

1998/06/01 Manufacturing Process Improvement Increases Reliability Of Speed Sensors {1900}

1998/06/15 Similar Product Support Literature Available For Military Machines{7567}

1998/06/22 More Frequent S·O·S Oil Analysis Improves Component Life Cycle Management {7577,7542,7576,7571,7574,7578,7575,7573}

1998/06/22 New Guideline For Product Information, SEBF8340, " Fuel Systems Troubleshooting Guide For 3204, 3300, And 3400 Engines With New Scroll Fuel Systems (NSFS)" Available {0374,1250}

1998/06/29 Re-Alignment Warning Tag On All 3500 Generator Sets Reminds Of Alignment Required At Installation {1021}

1998/07/13 Circuit Breakers Are Changing From Red To Blue Reset Buttons{1420}

1998/07/20 Priming The 144-0835 Unit Injector Hydraulic Pump{1714}