1980/03/03 Caterpillar

Fuel Heaters Are Now Available For Field Installation{1296}


See The Model Application Chart For Models

During operation in cold temperature conditions, some customers have had fuel filter problems in areas where lighter grade fuels are not easily available. Heavier grade fuels have a higher "cloud point", which is the temperature where wax becomes solid particles in the fuel. When atmospheric temperatures are lower than the "cloud point" of the fuel, the solid particles of wax fill the fuel filters and stop the flow of fuel. To prevent this problem, fuel heaters are now available for field installation. The new fuel heaters use engine coolant to heat the fuel and prevent the development of solid wax particles.

Two different heater assemblies are used in the five new heater groups, as shown in the Group Components Chart. The 8N9455 Heater Assembly fits between the spin-on fuel filter and the filter base. Where a double filter is used, two heater groups are needed. The 8N9593 Heater Assembly is remotely mounted, and connected into the fuel supply line to the fuel filter. This heater can be used for applications where clearances do not permit use of a filter-mounted heater. For some applications, an optional installation is to use a remotely mounted fuel filter with a filter-mounted heater.

The new fuel heaters are adaptable to most Caterpillar products. For some installations, small changes and/or modifications are necessary. Special Instructions are available for installation, as shown in the Group Components Chart.

When a fuel heater is used, and atmospheric temperatures are below approximately 32°F (0°C), the recommendation is to start the engine and run it at low idle rpm until the coolant hoses to the heater become warm. This will keep the amount of wax in the fuel filter at a minimum.

Caterpillar Information System:

1980/03/03 Connecting Rod Changes And Replacement Information{1218}
1980/03/03 Spacer Plate Block Group Used For Parts Service Of Block Group With Counterbore Design{1101,1201}
1980/02/25 Identification Of Fuel Injection Lines And Nozzle Bodies For Different Combustion Systems{1252,1254}
1980/02/25 Drawings Available For Six Tools Used During Repairs Of Damaged Pin Bores In Two-Piece Booms{6501,0665}
1980/02/25 Plunger Movement Must Be Adjusted When New Rack Shut-Off Solenoid Is Installed{1259}
1980/02/25 Stronger Braces Used Between Air Cleaner And Engine{1051}
1980/02/25 Revision Of Special Instruction Form No. SMHS7267, "Use Of 5P8709 Tool Group For Alignment Of Piston Cooling Jets" Has Important Changes{1307}
1980/02/25 How To Check Operation Of Hydramechanical Shutoffs On D379B, D398B, D399 Engines{7418}
1980/02/11 Use The Correct Water Temperature Contactor{1350,1100}
1980/02/11 Warning: Avoid Use Of Fuel Mixtures Of High Volatility. If You Are Exposed To Such Mixtures, Be Aware Of The Hazards Involved And Take Proper Precautions{1280}
1980/02/04 Real Value Available Through Caterpillar Remanufacturing Programs{0374}
1980/02/04 Change To Gear On Accessory Drive Shaft Assembly Gives Longer Service Life{1207,1206}
1980/03/24 Inspect Regulator Cover Assembly When Overcooling Is A Problem{1350,1380}
1980/03/24 Crankshaft Rear Seal And Wear Sleeve Are Now Serviced As A Group Instead Of Separate Parts{1161}
1980/03/24 New Top Piston Ring Has Plasma-Coated Face{1215}
1980/03/24 8S2252 Carbon Seal Tool Can Be Adapted For Use On 8N7001 Fuel Nozzle Assembly{0611,1254}
1980/03/24 Different Water Temperature Regulators Now Used To Prevent Overheating{1355}
1980/03/24 Visual Inspection Of Main And Connecting Rod Bearings{1203,1219,1230}
1980/03/24 New Fuel Injection Lines And Clamps Prevent Stresses And Contact Which Can Cause Leakage{1252}
1980/03/24 An Increase In Engine RPM Will Extend Vanes In Hydraulic Oil Pump To Start Pump Output{5055,5068}
1980/03/24 New Plugs And Rubber Stoppers For Machines With Sealed And Lubricated Track{4169,4170,4175,0622}
1980/03/24 New Control Valve Body{1155,1159}
1980/03/24 Different Vibration Damper Now Used{1205}
1980/03/31 Use The 6V200 Hydraulic Wrench To Get Correct Torque Applications On Fasteners In Difficult Access Areas{0612,0623}
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