Glossary of Terms
Section i - Introduction
Glossary of Terms
Air Fuel Control; a device in the fuel pump that limits the fuel delivery until
there is sufficent intake manifold pressure to allow for complete combustion.
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 or intake
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.
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 or ex-
In the direction of a circle in respect to the centerline of a round part or a
A measurement of the difference between the centers of either two or more
parts or the bores in one part.
Control Parts List; this listing identifies the specific parts that must be in-
stalled on the engine to meet agency certification.
This is a one part Room Temperature Vulcanizing (RTV) silicone rubber, ad-
hesive and sealant material having high heat and oil resistance, and low
Some of the equivalent products are Marston Lubricants, Hylosil, Dow Corn-
ing, Silastic 732, Loctite Superflex, General Electric 1473, and General Elec-
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.
The clearance in an assembly determined by pushing the shaft in an axial
direction one way and then pushing the shaft the other way.
Engine Serial Number
A hand tool consisting of a hard steel head on a handle.
A single component, anaerobic, polyester resin, liquid sealant compound that
hardens between closely fitted metal surfaces producing a tough, hard bond.
An equivalent product is Perma-Lok HL 126.
A single component anaerobic, liquid adhesive that meets or exceeds the re-
quirements of MIL-R-46082A (MR) TYPE1.
Some of the equivalent products are Loctite 601 and Permabond HL 138.
A mineral oil base grease with calcium soap (2 percent to 6 percent), and
zinc oxide (2 percent to 4 percent) additives.