TM-9-2520-272-40 Direct Support for M113A3 X200-4A Transmission 2520-01-397-1074 Download
Page 607 of 620
TM 9-2520-272-40 GLOSSARY GLOSSARY B Burr Local rise of material forming a protruding sharp point or high spot. C Chipping Loss of material over a larger area than that of nicks. Control Valve Body This unit contains most of the hydraulic controlling devices such as the steering valves, range selection valve, main pressure regulator, converter pressure regulator, and lubricating pressure regulator. Component Any part or group of parts that, when together, form a subassembly or assembly. Corrosion Chemical reaction between surfaces of material and environment to which it is subjected. Generally appears as rust on steel or as a light- colored, powdery coating on aluminum or magnesium. Advanced forms of corrosion will result in pitting. Crack Surface or material break caused by stress which results in partial or complete separation of material. D Defect Any nonconformance of a characteristic with specif ed requirements. Diagnostic Pertaining to the act of examining, observing, and analyzing systems to determine the condition of that being inspected. Distortion Loss of original shape, either local or over an area. Includes bends, twists, warps, bulges, dents, kinks, f attening, or crushing. DMWR Depot Maintenance Work Requirement. E End Cover Right and Left Assemblies. Each unit contains an output planetary, a brake, a steering pinion, gears, and an output f ange or coupling. Excessive Wear Obvious wear beyond expectations. Determined by inspector’s experience. Term is applicable to parts visually inspected. F Fit The term “f t” as used in this manual refers to the mating of associated parts and/or components. a. A loose f t is the condition where suff cient tolerance is provided between the associated parts to allow free movement. b. A tight, interference, or press f t is when one part with a given outer diameter is pressed into a part with an equal or smaller inner diameter to prevent associated parts from moving in relation to each other. c. A shrink f t is provided when one part with a given outer diameter is chilled and the other part with a given outer diameter is heated to permit mating. A shrink f t is accomplished when the associated parts return to normal, ambient temperature. Front Housing This unit consists of a large aluminum casting containing the main input oil pump, output oil pump, and oil f lter. It is assembled with the rear housing as a matched set and is identif ed by serial number near the top split line. G Gall A scratch or groove caused by rubbing. Gouge A groove in or breakdown of metal surfaces from foreign contact under heavy pressure. Usually, loss of material rather than displacement. Groove A long, narrow channel or depression. I Inspection The examination and testing of supplies and services to determine whether they conform to specif ed requirements. L Leakage Evidence of a f uid beyond its container. Glossary–1