1997/08/18 Caterpillar

Use Separate Sampling Pump For Oil and Coolant {7542,7577}

Usage:

All Caterpillar Machines Requiring Scheduled Oil Sampling (SOS)

SUPPLEMENT: OCTOBER 13, 1997

Service Magazine; August 18, 1997; Page 17; "Use Separate Sampling Pump For Oil And Coolant".

The header is incorrect. It should read as follows:

All Caterpillar Machines Requiring S·O·S Fluid Analysis

--------------- END SUPPLEMENT ---------------

The same vacuum sampling pump for extracting oil samples should not be used for coolant samples. The fluid does not enter the barrel of the pump, however a small residue of glycol from the coolant will remain in the pump. This residue will contaminate oil samples and can cause a false positive analysis, which in turn can lead to customer and dealer concerns.

Dealers and customers should designate separate sampling pumps for taking oil and coolant samples.

Caterpillar Information System:

1997/08/18 Lubricity Limit Added To Preferred Distillate Fuel Recommendation {1280,7568}

1997/07/28 Protection Of Unsealed Electrical Terminations For Machines Used In Corrosive Applications{1400}

1997/07/28 Required Maintenance Of Air Cleaner Dust Valves{1050,1051,1055,1068}

1997/07/07 Governor Control Cover Assembly Includes New Seal And Improved Cover {1264}

1997/07/07 Revised Special Instruction, SEHS9160, "Replacing The Spacer On The Cutter Wheel And Changing The Height Dimension Of The Cutter Wheel On tTe 4C-5084 Oil Filter Cutter" Is Available {0678,1261,1308,3004,3067,4070,5068,5092,5177}

1997/06/30 Certain Publications Are Now Printed On Demand {0374}

1997/06/30 Dealer PC Hardware Purchase Recommendations For All Caterpillar Applications {7600,7601,1920}

1997/06/23 Improved 2-Pin Deutsch® DT Connector Now Used {7553}

1997/06/09 Improved Coolant Flow Switches Available {7425}

1997/06/09 Mechanical Unit Fuel Injector Groups Spill Shield Changed {1290}

1997/05/26 Correct Orientation For 3E-8827, 9X-6796, 9X-9096, 107-7977, 117-1379, 121-4134, 121-4135, 125-9597, And 132-2156 Alternators During Installation{1405}

1997/05/26 Safety Manuals For Each Product Line Are Available{0353,0375}

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

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

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

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

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

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

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

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

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

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

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

1997/10/27 History Of Pump Impeller (Water Pump) Changes{1364}