1977/01/24 Caterpillar

Exhaust Manifold Coupling With A Slip Fit Now Used Instead Of A Coupling With Piston Rings{1061}

Usage:

3408 Truck and Industrial Engines, 3412 Industrial Engines

Description of Change: An exhaust manifold coupling with a slip fit is now used instead of a coupling with piston-type rings. Tests have shown the coupling with a slip fit will prevent leaks for a longer period of time than the coupling with piston-type rings.

Location of coupling.

Adaptable To: All 3408 and 3412 Engines except Industrial and Marine Engines equipped with water-cooled exhaust manifolds.

INSTALLATION: Check the inside diameter of the elbows that the coupling fits into for existing wear. If the elbows have too much wear replace them before a new coupling is installed.

Put a thin application of high-temperature sealant on the outside diameter of each end of the coupling before installation.

Caterpillar Information System:

1977/01/24 Drain All Coolant From Engines Before Shipment For Remanufacturing{0355,1350}

1977/01/17 New Water Temperature Regulator Has A Closer Fit At The Valve Seat To Keep Leakage At A Minimum{1355}

1977/01/17 New Flywheel Assemblies Are Available For Use With Spicer Transmissions{1156}

1977/01/17 New Tie Bars Improve Stability Of The Fuel Injection Test Bench{0652}

1977/01/17 SIRS Component Code List{0331}

1977/01/17 New Special Instruction For Troubleshooting 5P2150 Engine Horsepower Meter{0651,1250}

1977/01/17 Blades For Hose Saw Cut Off Group Must Now Be Sent To New Address To Be "Resharpened"{0664}

1977/01/17 Improved Main And Connecting Rod Bearings Have Aluminum Alloy With More Strength{1230}

1977/01/17 Removal Of Bolts With Metal Locks Easier With New Sockets{0610}

1986/12/22 New Torque Control Group Used In Governor And Fuel Injection Pump Group{1264}

1986/12/22 New Oil Level Gauges (Dipsticks) With "Full Range" Used{1326}

1986/12/22 Fuel Dilution Troubleshooting Procedure{1250}

1977/01/24 Exhaust Valve Guides With A Counterbore Are Now Available{1104}

1977/01/24 Adapter For Disassembly And Assembly Of Turbocharger Cartridge{0620,1053}

1977/01/24 Same Valve Camshaft Assembly Used On Direct Injection Engines Now Used On Engines That Have Precombustion Chambers{1210}

1977/01/24 Coupling With A Slip Fit Now Used At Turbocharger Exhaust Outlet Instead Of Coupling With Piston Rings{1061}

1977/01/24 New Cylinder Liners{1216}

1977/01/24 Lightening Holes Not Drilled In Some Crankshafts{1202}

1977/01/31 New Disconnect Switch Assembly Has Better Resistance To Corrosion{1411}

1977/01/31 Improved Crankshaft Main Bearing With Higher Strength Aluminum Alloy{1203}

1977/01/31 New Remote Control Switch Assembly For Electric Hydraulic Pumps{0621,0623}

1977/01/31 Transportation Notice Plate Is No Longer Needed For Pressurized Nitrogen Cylinders{7557}

1977/01/31 Low Emission Truck Engines With Exhaust Gas Recirculation (EGR) Systems{1050}

1977/02/14 Correct Use Of Plugs In Drain Holes Of Hydraulic Pumps That Have Two Seals On The Shaft-Use A Plug In Drain Hole Except With Water Glycol Systems{5055,5073}