1982/03/08 Caterpillar

New Adapters And O-Ring Seals Used In Aftercooler Group{1063}

Usage:

All 3408 And 3412 Engines Equipped With An Aftercooler

Description of Change: A change has been made to the aftercooler groups used on the above engines. New adapters are used at the water inlet and outlet ports of the aftercooler. Also, new O-ring seals which are smaller in diameter are used with the new adapters.

During installation of the elbows, which fit over the former adapters, it was possible to damage the O-ring seal used between the elbows and adapters.

Adaptable To: The new 1W5947 Adapter is a direct replacement for the 4N5787 Adapter and is in effect with the engine Serial Numbers shown in the chart. Two adapters are used with each aftercooler group. For replacement of the former 4N5787 Adapter, order the new adapter and one 6F8146 Seal.

Location of 1W5947 Adapter and 6F8146 Seal in aftercooler group.

Caterpillar Information System:

1982/03/08 Heavy Duty Air Cleaner Available, With Precleaner And Automatic Dust Ejector{1051,1055,1061,1062}

1982/03/08 Reconditioning of Bridge Wear Seat Is Permitted; Will Prevent Bridge Replacement When Not Necessary{1100}

1982/03/08 New Double-Wall Fuel Injection Lines Group And Fuel Drain Group Available As Attachments For Protection Against Fuel Leakage{1252,1254,7400}

1982/03/01 New Marine Gear Groups Have New Clutch Plates{3302}

1982/03/01 New Gasket Used In Governor And Fuel Injection Pump Group{1259,1286}

1982/03/01 Brass Plug Used To Prevent Corrosion{3320}

1982/02/22 New Idler Shaft Used In Fuel Transfer Pumps{1256}

1982/02/22 Use 6V6035 Hardness Tester On Crankshafts{0651,1202}

1982/02/22 Engine Storage; Engine Start-Up After Storage{1000}

1982/02/22 Use A Magnetic Chuck To Hold Parts On Work Bench{0626}

1982/02/22 New Main Bearings And Connecting Rod Bearings Have Thicker Layer Of Surface Material{1230,1203,1219}

1982/02/22 Use The Correct Governor For Parallel Applications{1289,1264}

1982/03/08 Correct Lubrication Procedure Will Prevent Damage To Fan Drive{1359,0374,0375}

1982/03/15 More Flexible Hose For Use With Hydraulic Flowmeter{0651,5050}

1982/03/15 New Diaphragm Used In Fuel Ratio Control{1278}

1982/03/15 Use The 6V6059 Microlite With The 6V2196 Inspection Microscope{0651}

1982/03/15 New Oil Pump Outlet Elbow Is Stronger{3314,3310}

1982/03/22 Carbon Build-Up In Combustion And Inlet Areas{1058,1101,1105,1214,1104}

1982/03/22 Use Correct Torque On Hydraulic Valve Bolts, Nuts And Taperlock Studs{5050}

1982/03/22 Engine Replacement{1000}

1982/03/22 Improved Valve Cover Seal Used{1107}

1982/03/22 Use 5P5195 Fuel Line Wrench Correctly{0612,1252}

1982/03/22 Caterpillar Electric Starting Motors{1453,1407}

1982/03/22 Correct Use Of 6V2023 Flow Check Adapter Group Is Important To Prevent Damage To An Engine{0651,0654,1250}