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 Puller Tools Available For Removal Of Steering Cylinder Pin{0621,4303,7058}

1981/01/19 Steel Turbocharger Steam Vent Tube Assemblies Have Longer Service Life Than Copper Tube Assemblies{1052,1053,1380,1000}

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

1981/01/19 FT1576 Puller Plate Used For Removal Of Crankshaft Gear; Drawings For FT1576 Puller Plate Can Be Used For Modification Of Existing Puller Plate{0621,1204,1202}

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

1980/12/22 Four Fabricated Tools Available For Use During Service Of Fuel System Timing Gear{0621,0612,1206,1253,1207}

1980/12/22 Installation Tips For Snow Wing{6150,7051,1356,7155}

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}

1980/12/15 Improvements To Selector And Pressure Control Valve Group Give Operator Better Control When Manual Modulation Pedal Is Depressed (Pushed In){3167,3162,3157,3152}

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

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 Green Dye (Color) Added To Transmission Oil For Easier Identification Of Leaks{3004,3067,3179}

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 Washers Added To Prevent Broken Bolts In Stabilizer Rod Joints (Connections) On Rear Axle Housing{3260,3268}

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

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}