1982/03/22 Caterpillar

Correct Use Of 6V2023 Flow Check Adapter Group Is Important To Prevent Damage To An Engine{0651,0654,1250}

Usage:

All Caterpillar Diesel Engines

Reference: "6V2023 Flow Check Adapter Group Is Available" on Pages 3 and 4 of the March 31, 1980 Service Magazine.

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NOTICE

Use the procedure in Special Instruction, Form No. SMHS7083 when the 6V2023 Flow Check Adapter Group is used to check injection timing. Damage to an engine can result if the adapter group is not used correctly.

The 6V2023 Flow Check Adapter Group is used to check the injection timing on all Caterpillar Diesel Engines through use of the fuel flow method.

Correct use of the 6V2023 Flow Check Adapter Group is important to prevent possible damage to an engine caused by engine run-away conditions (overspeed conditions). A seizure of an injection pump plunger can result if the 6V2018 Pin (part of the 6V2023 Flow Check Adapter Group) is extended too far before the adapter is installed into a pump. If the pin is extended too far, the reverse flow check valve will be pushed into contact with and be broken by the pump plunger. The broken parts can cause a seizure of the pump plunger. If the governor is in the "fuel-on" position and an engine is started in this condition, a run-away can result.

Add the "CAUTION" in this article to the reference articles which are shown above.

Caterpillar Information System:

1982/03/22 New Bracket Prevents Damage To Horn Wires{7303}

1982/03/22 Caterpillar Electric Starting Motors{1453,1407}

1982/03/22 Use 5P5195 Fuel Line Wrench Correctly{0612,1252}

1982/03/22 Engine Replacement{1000}

1982/03/22 Use Correct Torque On Hydraulic Valve Bolts, Nuts And Taperlock Studs{5050}

1982/03/22 Carbon Build-Up In Combustion And Inlet Areas{1058,1101,1105,1214,1104}

1982/03/15 Service Parts Available For 6G7650 Seat{7312,7307,7321}

1982/03/15 New Stem And Springs In Overspeed Valves Permit Operation Down Steeper Grades Without Track Motor Damage{5051,5451,5474}

1982/03/15 New O-Ring Seal Used On Cartridge-Type Relief Valves Has Better Resistance To Damage{5050,3200}

1982/03/15 Use The 6V6059 Microlite With The 6V2196 Inspection Microscope{0651}

1982/03/15 New Diaphragm Used In Fuel Ratio Control{1278}

1982/03/15 Difference Between Static And Dynamic Rack Settings Changed{0374,1257}

1982/03/29 Parts Book Changes{0374}

1982/03/29 Location Of Sending Unit Changed To Improve Accuracy Of Water Temperature Indication{7453}

1982/03/29 FT1667 And FT1668 Beam Assemblies For Undercarriage Removal{0642,0643,4150}

1982/03/29 Multi-Piece Wheel Rims; Caution Must Be Used{4202,4201}

1982/03/29 Increased Clearance Between Hoist Cylinder Assembly And Rod{5102,7258}

1982/03/29 Twisted Port Plate Can Cause Excessive Case Drain From Piston Pump Or Motor{5058,5070}

1982/04/05 Use FT1631 Flare Nut Wrench For Connector In Bulldozer Lift Circuit{0610,0611,0623}

1982/04/05 Lubricant Recommendations Have Been Changed For Vehicular Products{0680,0374,0375,3004,1318,5060}

1982/04/05 New Outer Duo-Cone Seal Groups Used In Service And Parking Brake Groups{4208,4251,4267}

1982/04/12 New Clearance Specification Used In Torque Converter{3101}

1982/04/12 Use Correct Part Numbers For Main And Connecting Rod Bearings{1230,1203,1219}

1982/04/12 Lock Screw For Threaded Crown On Hydraulic Cylinders No Longer Used{5000}