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 Caterpillar Electric Starting Motors{1453,1407}

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

1982/03/22 Improved Valve Cover Seal Used{1107}

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 New Oil Pump Outlet Elbow Is Stronger{3314,3310}

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 More Flexible Hose For Use With Hydraulic Flowmeter{0651,5050}

1982/03/08 Correct Lubrication Procedure Will Prevent Damage To Fan Drive{1359,0374,0375}

1982/03/08 New Adapters And O-Ring Seals Used In Aftercooler Group{1063}

1982/03/22 Use FT1614 Cover To Protect Center Shaft Assembly{0622,3305,3306,3302,3307}

1982/03/22 Improved Plunger And New Spring Used In Mechanical Shutoff Group{7418}

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 Flywheel Adapters For Dynamometer Testing{1156,0652}

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

1982/03/29 New Regulator Group Increases Coolant Flow To Cab Heater, Prevents Overcooling{1355}

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

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

1982/04/05 Conversion Of 49-State 3406 Truck Engine From 283 kW (380 hp) To 298 kW (400 hp) Arrangements{1000}

1982/04/05 Reminder: Check Valve Lash Adjustment At Correct Intervals{1102}

1982/04/12 Pressure Regulator Group Now Available For Parts Service{3152,3185,3166,3012}