1987/09/14 Caterpillar

New Digital Pyrometer Which Incorporates High Exhaust Temperature Alarm Now Used {1606,7412,7450,7466}

Usage:

3600 Family Of Engines

Description of Change: A new digital pyrometer is used in the instrument panel groups of the above engines. The new pyrometer gives a more accurate reading of the exhaust temperature than the former pyrometer. Additionally, a high exhaust gas temperature switch is incorporated.

Adaptable To: On in-line engines, the new 7C8980 Gauge (pyrometer) is a direct replacement for the former 3N7012 Pyrometer when used with the 7C9003 Front Plate and the 7C9220 Plug Assembly. Two 7C8980 Gauges (pyrometers) along with the 7C9003 Front Plate are required to replace the former 3N4416 Pyrometer on vee engines. The 7C9003 Front Plate is part of the instrument panel group. The 7C9003 Front Plate is required to accommodate the larger diameter face of the new pyrometer. The 7C9003 Front Plate is a direct replacement for the former 4W3036 Front Plate on in-line engines and the former 7W8360 Front Plate on vee engines. Refer to the illustration.

Mounting of the 7C8980 Gauge in the 7C9003 Front Plate with the 7C9220 Plug Assembly. In-line engine instrument panel group shown.

The new 7C9003 Front Plate does not include gauge name plates. Name plates can either be removed from the former front plate or new ones can be ordered. Refer to the chart for part number information.

Caterpillar Information System:

1987/09/14 New Piston Cooling Jets Used {1213,1214}

1987/09/14 Mid-Life Bearing Maintenance Recommendations {1203}

1987/09/14 New Turbochargers Have Several Improvements {1053,1066}

1987/09/14 Remanufactured 3208T Economy Truck Engine Available {1000}

1987/09/14 Four More Remanufactured Fuel Pump And Governor Groups Available {1286}

1987/09/14 Remanufactured Air Conditioner Compressor Available {1802}

1987/09/07 New O-Ring Seals Used In Water Lines{1350}

1987/09/07 Be Sure To Correctly Tighten Turbocharger Clamp Assemblies{1052}

1987/09/07 Use The Marketing Publications Information Feedback System{0374}

1987/09/07 Improved Warranty For Remanufactured Parts And Components{7754}

1987/08/31 Metal Protectors Replace Plastic Protectors On Head Studs {1100}

1987/08/31 Recommendations For Preventing Cooling System Damage {1201}

1987/09/14 Oil Flow Increased For Inlet Valve Lubricator {1105}

1987/09/21 New Adapters Available For Metric Test Ports So That SAE Connectors Can Be Used{0784}

1987/09/21 New Alternator Used In Charging Alternator Groups{1405}

1987/09/21 New Hydraulic Steering Mounting Group Available{4306}

1987/09/21 Single Lip Hydrodynamic Seal Used In Water Pumps{1300,1361}

1987/09/21 New Timing Gear Housing Used In Front Housing Groups To Help Prevent Oil Leaks{1162,1166}

1987/09/28 Thinner Piston Retaining Nuts Are Used In Hydraulic Cylinders {7562}

1987/09/28 Double Lip Seal With Hydrodynamic Grooves Used At Rear Of Crankshaft {1161,1200}

1987/09/28 Either Type Sleeve Satisfactory For Governor Servo Piston {1264}

1987/09/28 New Steel Fuel Injection Pump Lifters Should Not Be Mixed With Aluminum Lifters {1281,1250}

1987/09/28 New Special Instruction, "Using the PEEC Screen Map(s)" {0374}

1987/09/28 Engine Oil Coolers Have Rubber End Sheets In Place Of Brazed Sheets {1300,1378}