CUMMINS N14 Specifications download pdf (Page 14)

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Glossary Of Terms

AFC: Air Fuel Control; a device in the PT fuel pump that limits the fuel delivery until

there is sufficient intake manifold pressure to allow for complete combustion.

ATDC: After Top Dead Center; refers to the position of the piston or the crankshaft

rod journal. The piston is moving downward on the power stroke and intake

stroke.

BDC: Bottom Dead Center; refers to the position of the piston or the crankshaft rod

journal. The piston is at its lowest position in the cylinder.

BTDC: Before Top Dead Center; refers to the position of the piston or the crankshaft

rod journal. The piston is moving upward on the compression stroke and ex-

haust stroke.

Circumferential Direction: In the direction of a circle in respect to the centerline of a round part or a

bore.

Concentricity: A measurement of the difference between the centers of either two or more

parts or the bores in one part.

CPL: Control Parts List; this listing identifies the specific parts that must be in-

stalled on the engine to meet agency certification.

Cummins Sealant: This is a one part Room Temperature Vulcanizing (RTV) silicone rubber, adhe-

sive and sealant material having high heat and oil resistance, and low com-

pression set.

Some of the equivalent products are Marston Lubricants, Hylosil, Dow Corn-

ing, Silastic 732, Loctite Superflex, General Electric 1473, and General Elec-

tric 1470.

D.C.: Direct Current

Dye Penetrant Method: A method used to check for cracks in a part by using a dye penetrant and a

developer. Use crack detection kit, Part No. 3375432, or its equivalent.

End Clearance: The clearance in an assembly determined by pushing the shaft in an axial di-

rection one way and then pushing the shaft the other way.

E.S.N.: Engine Serial Number

Hammer: A hand tool consisting of a hard steel head on a handle.

I.D.: Inside Diameter

Loctite 290: A single component, anaerobic, polyester resin, liquid sealant compound that

hardens between closely fitted metal surfaces producing a tough, hard bond

with good characteristics. An equivalent product is Perma-Lok HL 126.

Loctite 609: A single component anaerobic, liquid adhesive that meets or exceeds the re-

quirements of MIL-R-46082A (MR) TYPE 1.

Some of the equivalent products are Loctite 601 and Permabond HL 138.

Lubriplate 105: A mineral oil base grease with calcium soap (2 percent to 6 percent), and zinc

oxide (2 percent to 4 percent) additives.

Glossary Of Terms Section I - Introduction

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CUMMINS N14 Specifications Page 14

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