1990/10/29 Caterpillar

New Temperature Regulators Prevent Engine Overheating{1355}

Usage:

621S (8KD ),
D4E (31C, 34C, 2DJ, 7PB, 76W, 77W ),
D5B (8HD, 5LD ),
D6D (36C, 37C, 38C, 7XF, 74W, 75W ),
D6D SA (19B ),
D6E (2MJ ) Tractors;
930 (17B ),
930R (57Z ),
966C (18B ),
966R (58Z ) Loaders;
120G (4HD ),
140G (5MD ) Motor Graders;
3306B (3RG ) Generator Set Engines

Description of Change: Two new temperature regulators are used which reduce the chance of engine overheating. The new regulators are designed to operate within specification according to machine requirements. The former temperature regulator did not always "open" at the specified temperature, and when it did, it would not always "open" far enough. This could cause the engine to overheat.

Adaptable To: The new 7E3361 and 7E3362 Regulators are direct replacements for the former 7N0208 Temperature Regulator (canceled) depending on the application. The new 7E3362 Temperature Regulator has several dimensional changes and a different adjustment screw configuration. The former temperature regulator was used in all of the above machines.

This change is effective for the 7E3361 Regulator with: 621S (8KD628), D4E (31C674, 34C2016, 2DJ217, 7PB715, 76W2666, 77W1161), D5B (8HD583, 5LD398), D6D (36C1523, 37C1417, 38C466, 7XF180, 74W1537, 75W3357), D6D SA (19B818), D6E (2MJ89) Tractors; and 930 (17B662), 930R (57Z2373), 966C (18B1189), 966R (58Z1737) Loaders. This change is also adaptable to first production.

This change is effective for the 7E3362 Temperature Regulator with: 120G (4HD1174), 140G (5MD825) Motor Graders; and 3306B (3RG283) Generator Set Engines. This change is also adaptable to first production.

Caterpillar Information System:

1990/10/29 New CE (Caterpillar Environmental) Family Of Metal-Shell Connectors Used{7553}

1990/10/22 New "On Engine" Adjustment Procedure For 3161 Woodward Governor {1264,0782}

1990/10/22 Increased Capacity Oil Sumps Require Additional Oil And Different Maintenance Interval {1302,1318,7524,7525}

1990/10/22 Front Trunnion Bolts May Come Loose {1153,1154}

1990/10/22 Improved 7C1757 Exhaust Manifold Group {1059}

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}

1990/10/29 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}

1990/11/05 New Exhaust Manifold Gasket And Locks Used In Exhaust Manifold Groups{1059}

1990/11/05 New Stronger Exhaust Valve Push Rod Used In Valve Mechanism Groups{1208}

1990/11/05 Some Components Of The 7E3580 Engine Adapter Group For Allison AT545, MT543D, And MT653DRD Transmissions Are Not Serviced By Caterpillar{3279,1013,3009}

1990/11/05 Service Manual SENR3479-04 Available For Troubleshooting Engine Test Procedures{1901,1900}

1990/11/05 New Crankshaft Seal Groups Used{1160,1161,1202}