Stronger Bolt Now Used With Exhaust Manifold {1059,1307}
Usage:
3408 ( 67U ) and 3412 ( 38S ) Industrial Engines
Description of Change: A bolt of a different material and more strength is now used in the turbocharger oil lines groups on 3408 and 3412 Industrial Engines. This bolt is used to hold two sections of the exhaust manifold together. See the illustration. Expansion, caused from the exhaust manifold heat, can cause failure of the bolt formerly used at this location. The new bolt is strong enough to prevent this type of failure.
Adaptable As: The new 5P7128 Bolt is a direct replacement for the 9L7373 Bolt in this application.
Location of bolt.
Caterpillar Information System:
1979/09/10 Insulation Sleeve For 5P7360 Tach Generator Now Available {7462}
1979/09/03 Improved Hardware Now Used To Fasten Front Suspension Cylinder To Frame{7201}
1979/09/03 Improved Wire Assembly For Glow Plugs{1403}
1979/09/03 Quick Disconnect Coupling On Optional Modification Of 5P4150 Nozzle Tester Permits Faster Exchange Of Adapters{0651,1254}
1979/09/03 Important: Use Only 8N4029 Fan On 769C Trucks And 768C Tractors{1356}
1979/09/03 Follow Recommendations Given In Special Instructions For Modification Of Rollover Protective Structures (ROPS) At All Times{7323,7325}
1979/09/03 Only One Dowel Pin Is Now Used To Hold The Thrust Bearing In The Correct Position{1053,1052}
1979/09/03 Use Caution To Prevent Damage To Plastic Check Valve In Hydraulic Oil Tank And Transmission Oil Tank Drain{5056,3177}
1979/08/27 New Design Thrust Plate Used In Crankshaft Group{1201,1202,1203}
1979/08/27 New Rocker Arms And Rocker Arm Shaft Have Improved Lubrication{1102}
1979/08/27 Engine Oil Viscosity Changed To SAE 10W/30 For Shipment From All U. S. Factories{1318}
1979/08/27 Hardened Washers And Increased Torque Are Now Used On The Bolts Which Fasten The Circle Drive Group To The Circle Drawbar{5207,6153}
1979/09/10 6V2055 High Vacuum Grease Gives Better Oil Seal {1052,1053,1077,0682}
1979/09/10 Undercarriage Disassembly And Assembly Procedures And Specification Charts Are Available {4150,4159,4154,4171,4180}
1979/09/10 New Gasket Used In Water Lines Group For Aftercooler {1380,1063}
1979/09/10 Gasket Added To Rear Wheel Spindle Housing For A Better Seal {4205}
1979/09/10 Different Grease Fitting Now Used In Fan Drive Group {1359}
1979/09/10 Recommendation For Use Of A FLEX-HONE On 1100, 3100 and 3200 Series Engines {1201}
1979/09/10 Tee Handle Hexagonal Wrench In Rack Adjusting Tool Is Now Available For Parts Replacement
1979/09/10 Pin Bore Is Now Offset (Not In The Center) .059" (1.5 mm) In The Piston To Stop Vibration Of The Cylinder Liners Which Can Cause Pitting On The Coolant Side Of The Cylinder Liners {1214,1216}
1979/09/10 Engines Can Use Crankshafts With Either Six Or Eight Counterweights {1202}
1979/09/17 New Main And Connecting Rod Bearings Have A Thicker Layer Of Surface Material{1230,1203,1219}
1979/09/17 Improved Sea Water Pump Now Used{1361,1371}
1979/09/17 New Bracket Available For Installation Of Jacket Water Heater{1383}