1977/10/03 Caterpillar

Change Is Made to Support Beam For Front Of Engine{0643}

Usage:

D348, 3408 Engines;
992, 992B Loaders;
776 Tractors;
613B, 631D, 633D, 637D Tractors;
777 Truck

The FT1321 Support Beam has been changed so it can also be used to support the 3208 Engine in the 613B Tractor when the front engine support is removed. An adjustable stand must be used with the FT1321 Support Beam.

The changes to the FT1321 Support Beam are four new holes in the beam and two new blocks. A drawing of the FT1321 Support Beam which gives the dimension for this latest change is available from your Division Manager. A modification can be made to an existing FT1321 Support Beam to drill four new holes in the beam and to fabricate the two new blocks. See the illustration.

Dimensions needed to drill holes in support beam and to make two blocks.

Caterpillar Information System:

1977/09/26 New Special Instruction Gives General Information On The Use Of The 5P6590 Wiring Harness Tester For Electrical System Testing{0650,1400}

1977/09/26 Stronger Fan Drive Pulley Prevents Cracks During Assembly; Torque On Pulley Bolts Changed{1359}

1977/09/26 Use Correct Contact Point With Dial Indicator To Be Sure Of The Accuracy Of The Measurements Of Fuel Setting And Fuel Ratio Control Setting On Sleeve Metering Fuel Systems{0653,1250}

1977/09/19 Stronger Piston Is Used; Piston And Connecting Rod Are Tapered In Area Of Piston Pin{1213,1214,1218}

1977/09/19 Use Viscous (Fluid) Type Crankshaft Vibration Damper In Place Of Rubber Type Damper{1205}

1977/09/19 Changes To The Injection Pump And The Fuel Setting{1251,1257}

1977/09/12 New Refrigerant Compressors And Kits With Improved Seals; Conversion Of Earlier Units{7320}

1977/09/12 The Discrepancy Card Has Changed{0374}

1977/09/05 Field Repair Of Cooler Cores Made Of Aluminium{1063,1374,1375}

1977/09/05 Check For Extra Holes In Crankshaft Flange If Oil Leaks From Between The Flywheel And Crankshaft Flange{1156,1202}

1977/09/05 Installation Procedure For Crankshaft Wear Sleeves Changed{1202,1160,1161}

1977/08/29 More Bolts Hold Flywheel Housing Group{1157,1162}

1977/10/03 Turbocharger Heat Shields Are Stronger{1073}

1977/10/03 Washer Removed From Variable Timing Unit{1206,1272}

1977/10/03 Do Not Use Plastic Tubing With Brass Couplings As A Fuel Supply Line{1274}

1977/10/10 Be Sure To Drain Oil From The BrakeSaver At Every Lubricating Oil Change Period{1318,1155}

1977/10/10 Fuel Transfer Pump Shaft With Chromium Plate{1256}

1977/10/10 New Front Housing Has Stronger Boss For Alternator{1151}

1977/10/10 Troubleshooting The Tachometer System Of The 4S6553 Engine Instrument Group{0651}

1977/10/10 Use Only The Larger Size Inserts To Make A Repair To Cylinder Block Counterbores For Cylinder Liners{1201,1216,1217}

1977/10/10 Improved Oversize And Undersize Connecting Rod And Main Bearings With Higher Strength Aluminum Alloy{1203,1219,1230}

1977/10/10 If The Fuel Setting Dimension Is More Than 7.00 MM, Remove The End Play Of The Camshaft To Make The Fuel Setting{1257,1286}

1977/10/17 Fabricated Extension Prevents Fuel "Splash" During Injection Valve Testing{0650,1254}

1977/10/17 Preparation Of Truck Engines For Cold Weather Operation{1300,1000}