Section I - Introduction Glossary Of Terms N14 Page i-11 Magnetic Particle Inspec- tion: A method of checking for cracks in either steel or iron parts. This method re- quires a Magnaflux machine, or an equivalent machine that imparts a mag- netic field on the part being checked. Mallet: A hand tool consisting of a soft head, either wood, plastic, lead, brass, or rawhide, on a handle. MAX: Maximum allowed MIN: Minimum allowed No.: Number O.D.: Outside Diameter OS: Oversize Protrusion: The difference in the height between two parts in the assembled state. STD: Standard TDC: Top Dead Center; refers to the position of the piston or the crankshaft rod journal.
The piston is at its highest position in the cylinder. The rod journal is pointing straight up toward the piston. T.I.R.: Total Indicator Runout; used when measuring the concentricity or the runout. The T.I.R. refers to the total movement of the needle on a dial indicator, from the most negative reading to the most positive reading. Water Pump Grease: A premium high temperature grease that will lubricate antifriction bearings continually from minus 40°C [ minus 40°F] to plus 150°C [ plus 350°F]. Some of the greases meeting this requirement are Aeroshell No. 5, Chevron SRI, Amoco Rykon Premium No. 2, Texaco Premium RB, and Shell Dolium R. Aeroshell No.
5 is not compatible with the other greases and must not be mixed. Cummins Engine Company, Inc., uses Aeroshell No. 5 on new engines and components.