1981/01/19 Caterpillar

Thicker Layer Of Chrome Now Used On Governor Spring Guide To Extend Its Service Life{1264}

Usage:

Most Engines Equipped With Hydramechanical Governors, Except For Those With A Dashpot

Description of Change: The layer of chrome used on the spring guide in hydramechanical governors, except for those with a dashpot, has been increased to improve the service life of the guide. The increase is from a thickness of 0.008 - 0.013 mm (.0003 - .0005") to a minimum thickness of 0.06 mm (.002"). Formerly, contact between the spring seat and guide some times caused the chrome to wear through. After the chrome wears through, wear to the guide is rapid.

Adaptable As: The 8M8403 Spring Guides with the thicker layer of chrome are a direct replacement for earlier guides. The part number did not change. For identification, guides with the thicker layer of chrome have a groove in their seat. See the illustration.

Location of groove in guide seat.

Caterpillar Information System:

1981/01/19 New Connecting Rod And Main Bearings Have A Thicker Coating (Layer) Of Lead-Tin Overlay{1230,1219,1203}

1981/01/12 Improvements Made To 5P9718 And 6V186 Disc Pads Used During Gasket Removal{0675,0670}

1980/12/22 Wrong Turbocharger Group Shown In Parts Book{1052,0374}

1980/12/22 New Oil Pan Gasket Has Silicone Bead For Better Seal{1302}

1980/12/22 Exhaust Elbow Support Improved{1059,1061}

1980/12/22 Tires Are Filled With Nitrogen (N2){4203}

1980/12/22 6V4019 Camshaft Pilot Group Is Available{0622,1210,1211,1201}

1980/12/15 Replacement Timing Belts And Variable Belt For Fuel Injection Test Benches Available From Caterpillar{0652,1250}

1980/12/15 New Turbocharger, Turbocharger Oil Lines Group And Aftercooler Air Lines Group Used{1052,1058,1063,1307,1309}

1980/12/15 New Control Valve Group Used To Prevent Ratchet-Type Noise And Rough Clutch Engagement{3313}

1980/12/15 Be Sure To Cut The Center Gasket Even With Top Surface Of Oil Pan Sections To Prevent Oil Leakage{1302}

1980/12/15 New Bearing Sizes And Identification Codes For AiResearch Remanufactured Turbocharger Cartridges{1053}

1981/01/19 6V3141 And 6V3142 Puller Plates Available For Removal Of Tube And Gland From Front Suspension Groups{7201,0621}

1981/01/19 Inspection And Test Procedures To Follow When Fuel Ratio Control Does Not Operate Correctly{1278}

1981/01/19 New Sure Seal Electrical Connectors Used In Electrical Wiring Harnesses; Use 6V3000 Seal Repair Kit To Repair Sure Seal Electrical Connectors{0611,1408}

1981/01/19 Be Sure You Assemble The Turbocharger Lubrication Valve Correctly{1309,1052,1300}

1981/01/26 Ways To Prevent Damage To Spark Ignited Industrial Engines When Hydrogen Sulfide Is Present In The Fuel{1000,1280,1318,1350}

1981/01/26 Improved Tach Drive Adapter Has Step In Shaft To Keep Coupling Engaged{0651,0653}

1981/01/26 6V3150 Engine Pressure Group And 6V3121 Multitach Group Are Available For Testing Engines{0650,1000}

1981/01/26 Use Scheduled Oil Sampling To Find Change Intervals For Hydraulic Oil{5068}

1981/01/26 6V2009 Adapter Group Available To Test Scroll Fuel System On Fuel Injection Test Bench; Additional Parts Are Needed{0652}

1981/01/26 Use 2P2333 Manifold Sealer On Exhaust Manifold Slip Joints (Junction) During Assembly{1059}

1981/02/02 6V3129 Nozzle Puller Group And FT1533 Nozzle Assembly Adapter Can Be Used To Remove Fuel Nozzles{0621,1254}

1981/02/02 New Exhaust Manifold Has Slip-Joint Connections{1059,1061}