Improved 7C1757 Exhaust Manifold Group {1059}
Usage:
3176 Truck Engines
Description of Change: The exhaust manifold group has been improved to eliminate bolt loosening. The new exhaust manifolds have thicker flanges to reduce deflection and improve gasket retention. The thicker flanges require new bolts and spacers. Bolt locks are now used at cylinders 3 and 4.
Adaptable To: The part number of the improved 7C1757 Exhaust Manifold Group has not changed. The chart and illustration identify the new components. The new components are adaptable to earlier engines when used together.
Location of components.
Caterpillar Information System:
1990/10/22 Setscrew And Nut Available For Fuel Setting And Injector Synchronization {1257}
1990/10/22 Correct Procedure To Check For Grounds On Woodward 9905 Series, 2301A Control; Correction For Service Manual Module; 2301A Electric Governors (Load Sharing) For Generator Set And Industrial Engines; Form SENR3585-01 {1289}
1990/10/22 Engine Service Training Literature Uses New Form Number {0370,0374}
1990/10/22 New 4C5084 Oil Filter Cutter Replaces Former 6V7905 Filter Cutter {1318,1261,5068}
1990/10/22 4C6600 Battery Voltmeter For Determining Battery Percent Of Charge {7468,0785,1401}
1990/10/22 Improved 3T2357 Horn Switch, 3T3453 Starting Aid Switch, 3T3947 Start Switch, 3T8514 Test Switch Assemblies {1416,1456}
1990/10/15 New Temperature Regulators; Regulator Service Hours Changed{1330,0770,1355,7527,7543}
1990/10/15 Additional Clip And Hardware Prevent Damage To Fuel Line Of 4W6887 Instrument Panel{1261}
1990/10/15 Be Sure To Use Only 5P3975 Rubber Lubricant On The Core Assembly End Seals In Folded Core Or Multiple Row Module Radiators{1353,1351}
1990/10/08 New Pump Group With Bolt Dampers Used In Oil Pump Group{1304}
1990/10/08 Price Adjustments On Service Program Modules{1902,0782}
1990/10/08 New Exhaust Valves Are Used In Caterpillar Remanufactured Cylinder Heads{1105,1101}
1990/10/22 Front Trunnion Bolts May Come Loose {1153,1154}
1990/10/22 Increased Capacity Oil Sumps Require Additional Oil And Different Maintenance Interval {1302,1318,7524,7525}
1990/10/22 New "On Engine" Adjustment Procedure For 3161 Woodward Governor {1264,0782}
1990/10/29 New CE (Caterpillar Environmental) Family Of Metal-Shell Connectors Used{7553}
1990/10/29 New Temperature Regulators Prevent Engine Overheating{1355}
1990/10/29 Governor Control Motor Polarity May Require A Change{1265,1408,7556}
1990/10/29 New Bearing Kits Used In Turbocharger Cartridge Groups{1052,7551}
1990/10/29 Modification Of 1U7791 Valve Seat Driver{0782,1103}
1990/10/29 New Cylinder Head Gasket And Higher Cylinder Head Bolt Torque{1124,1101}
1990/10/29 Improved 7W7730 Cylinder Head Gasket Provides Better Sealing Capability{1124}
1990/11/05 New Composite Halogen Headlights And Floodlights Available{1429,1434}
1990/11/05 Obsolete Capacitor In VR1 Voltage Regulators{4467}