1980/03/24 Caterpillar

Different Water Temperature Regulators Now Used To Prevent Overheating{1355}

Usage:

3406, 3408 and 3412 Industrial and Marine Engines Equipped With Raw Water Heat Exchangers

Description of Change: A different water temperature regulator is now used in 3406, 3408 and 3412 Industrial and Marine Engines equipped with raw water heat exchangers. The water temperature regulator has a rating of 74°C (165°F).

Formerly, a water temperature regulator which had an 82°C (180°F) rating was used. Because of the higher operating range of the former regulator, in warmer waters it was some times possible for the coolant to get hot enough to cause the overheating alarm to be activated.

Adaptable As: The new water temperature regulator is a direct replacement for the former water temperature regulator as shown in the chart which follows.

Caterpillar Information System:

1980/03/24 8S2252 Carbon Seal Tool Can Be Adapted For Use On 8N7001 Fuel Nozzle Assembly{0611,1254}

1980/03/24 New Top Piston Ring Has Plasma-Coated Face{1215}

1980/03/24 Crankshaft Rear Seal And Wear Sleeve Are Now Serviced As A Group Instead Of Separate Parts{1161}

1980/03/24 Inspect Regulator Cover Assembly When Overcooling Is A Problem{1350,1380}

1980/03/03 Fuel Heaters Are Now Available For Field Installation{1296}

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}

1980/03/24 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}

1980/03/31 6V2023 Flow Check Adapter Group Is Available{0651,0654}

1980/03/31 Replacement Pinion And Output Gear Available For Service Of Torque Multiplier{0614}

1980/03/31 Remanufactured Short Blocks Are Available For Repairs Of Early 3406 Engines{1201,1101,1102}

1980/03/31 Caution: Outboard Bearing Must Be Removed From Extended Shaft Of Front Power Takeoff Before The Engine Is Moved{3055}

1980/03/31 Use Correct Cord Assembly With Jacket Water Heaters{1383}