1982/04/26 Caterpillar

Expansion Tank Changed To Permit Installation Of Water Level Gauge{1354,7470}

Usage:

3408 And 3412 Industrial And Marine Engines

Description of Change: A change has been made to the expansion tank assembly used on 3408 and 3412 Industrial and Marine Engines in marine applications. A hole has been added to the existing bracket, and a second bracket has been added to the right side of the tank assembly to permit installation of a water level gauge.

Adaptable To: All earlier engines so equipped. The part number of the 6N668 Expansion Tank Assembly did not change. If desired, a similar improvement can be made to earlier tank assemblies as shown in the illustrations. It will be necessary to fabricate a bracket for this purpose, as shown. This modification will permit installation of an 8N8272 Water Level Gauge Group (available only as separate parts - see Column Three of the Numerical Parts Record).

Modification of 6N668 Expansion Tank Assembly.

Specifications for fabricated bracket.

Caterpillar Information System:

1982/04/26 Improved Relief Valve Guide Decreases Maximum Oil Pressure During Cold Weather Starts{1315,1304}

1982/04/19 New Broken Link Spring Used In Governor{1264}

1982/04/19 Improvements Made To 6V3000 Sure Seal Repair Kit{0611,1408}

1982/04/12 Use Correct Size Bolt To Install 5P9736, 6V2156 Or 6V2157 Link Brackets{0644}

1982/04/12 New Seals Improve Pressure Regulator Group{3185,3012}

1982/04/12 Make Sure Hydraulic Pumps Are Installed Correctly{5055,5070,5073}

1982/04/12 Lock Screw For Threaded Crown On Hydraulic Cylinders No Longer Used{5000}

1982/04/12 Use Correct Part Numbers For Main And Connecting Rod Bearings{1230,1203,1219}

1982/04/12 Pressure Regulator Group Now Available For Parts Service{3152,3185,3166,3012}

1982/04/05 Reminder: Check Valve Lash Adjustment At Correct Intervals{1102}

1982/04/05 Conversion Of 49-State 3406 Truck Engine From 283 kW (380 hp) To 298 kW (400 hp) Arrangements{1000}

1982/04/05 Lubricant Recommendations Have Been Changed For Vehicular Products{0680,0374,0375,3004,1318,5060}

1982/05/03 6V4960 AC Current Probe Will Measure Current Easier{0652}

1982/05/03 Use New Special Instruction To Install 5P6595 Insert In Cylinder Liner Seats{1216,0621}

1982/05/03 New 6V4950 Injection Line Speed Pickup Group Used With 6V2100 Multitach{0651}

1982/05/03 Lubricant Recommendations Changed For All Caterpillar Engines To Combat Effects Of Fuel Sulfur{1318,0375,0374,1280}

1982/05/03 Use New 6V4910 Clamp-On Ammeter For Easier Electrical Current Measurement{0651}

1982/05/03 Use The Correct BrakeSaver Seal Group{1155}

1982/05/03 Use 6V6018 Skiving Vise To Hold XT Hose Assemblies{0623,0626,7554}

1982/05/03 Inspection Marks On Bearings{7551,1230,1226,1203,1219,1227}

1982/05/10 Larger Press And Improved Tooling Now Available To Fabricate XT Hose{0623,0624,0664}

1982/05/10 Bolts Now Used Instead Of Studs To Hold Cylinder Heads{1101,1201}

1982/05/10 New Exhaust Tubes And Support Used{1061,1067}

1982/05/10 New Crankshaft Main Bearings Used{1203}