1987/05/11 Caterpillar

Horizontally Mounted Jacket Water Heater Now Used {1383}

Usage:

3208 Generator Set ( 29A, 30A ) And Industrial ( 90N, 3Z ) Engines

Description of Change: A new, horizontally mounted jacket water heater is used on the above engines. The new jacket water heater is both more effective in heating the engine and also offers improved thermostat service life over the former jacket water heater. The new jacket water heater can be used with both 120 and 240 volt supplies.

Adaptable To: The new 7C7710 Jacket Water Heater is a direct replacement for the former 5N5740 Electric Water Heater when used with the 7C7706 Jacket Water Heater Mounting Group. The new 7C7706 Jacket Water Heater Mounting Group is a direct replacement for the former 4W2673 Jacket Water Mounting Group. Both the new jacket water heater and jacket water heater mounting group are now in effect. The new jacket water heater can be retrofitted to any earlier 3208 Engine listed above when installed with the 7C7706 Jacket Water Mounting Group. Refer to Illustrations 1, 2 and 3 and the chart for installation information. Refer to Illustrations 4 and 5 for electrical supply information.

Illustration 1. Installation of the 7C7710 Jacket Water Heater. View from back of engine.

Illustration 2. Installation of the 7C7710 Jacket Water Heater. View from side of engine.

Illustration 3. View A-A.

Illustration 4. Correct electrical connection of jumpers and thermostat wire.

Illustration 5. Electrical schematic showing heating elements connected in series when using 240 volts and parallel when using 120 volts.

Caterpillar Information System:

1987/05/11 Maintaining Coolant Water Temperature Contactor Accuracy {7453}

1987/05/11 The Caterpillar Fuel Flow Monitor System Available {0782,1000,1250}

1987/05/11 Black Light Leak Detection Kit Available For Oil, Fuel and Cooling Systems {0774,1250,1300,1350}

1987/05/11 Service Parts Available For Air-Regulated 8T5190 Wrench Group {0700,4202}

1987/05/11 Three Electrical And Electronic Training Aids Now Have Caterpillar Part Numbers Instead Of Form Numbers {0115}

1987/05/04 New Rear Crankshaft Seal Groups Have Longer Service Life{1161,1202}

1987/05/04 Testing The Starter On The Engine{1401,1450}

1987/05/04 Alternator/Generator Output Test On The Engine{1401,1404,1405,1406}

1987/05/04 Alternator "R" Terminal Wire Assembly Available For Wiring Harness Repair{1408}

1987/05/04 Products Equipped With Diagnostic Connectors Require Less Time For Electrical Troubleshooting{1400}

1987/04/20 New Service Tools Available{0600}

1987/04/20 Microfiche Library Cross References Caterpillar Part Numbers With Expanded Product Line Part Numbers{7567}

1987/05/11 Two New Self-Powered Digital Tachometers And Signal Generator Available {7462}

1987/05/11 Classifications For Marine Engine Ratings {1000}

1987/05/11 Enhancements Available For Marine PAR Program {1000}

1987/05/18 New Undercarriage Reconditioning Bulletin Available - Reusability Guidelines And Installation Procedures For Split Master Links{4176}

1987/05/18 Check Alternator Output Connection Prior To Machine Delivery{1405}

1987/05/18 Twist Drills Available{0670,0600}

1987/05/18 New Plastic Water Sleeve Used{1380}

1987/05/18 Hollow Dowel Relieves Accessory Drive Oil Leakage{1207,1166}

1987/05/18 Be Sure Tubing Clamps That Fasten Air-To-Air Aftercooler To Air Lines Are Correctly Installed{1058}

1987/05/18 New Precombustion Chamber Seal Available{1100,1106}

1987/05/18 Improved Oil Temperature Regulator Gasket{1330}

1987/05/25 1U5796 Pressure Differential Gauge Group Available For Load Sensing Hydraulic Systems and Differential Steering System{0770,0784,5050}