TM-9-2520-272-40
CROSS-DRIVE TRANSMISSION WITH CONTAINER MODEL X200-4A
TECHNICAL MANUAL; SUSTAINMENT MAINTENANCE MANUAL
FEBRUARY 2012
TM-9-2520-272-40 - 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
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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 ftis
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
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