TM 1-1 500-204-23-2
b. Elliptical Rings. The care and handling of elliptical
rings are the same as for O-rings, but elliptical rings are
used in fewer applications, such as in some landing gear
struts. Figure 4-70 shows a typical elliptical ring cross-
section.
c. V-ring Packings. V-ring packings used In Army
aircraft hydraulic installations are made of synthetic rubber
They are used in units that contain moving parts, such as
actuating cylinders and selector valves.
(1) Removal and cleaning. V-ring packings are
removed by much the same methods as for O-rings. After
packings are removed, the area In the component must be
thoroughly cleaned to prevent contamination or possible
harm to the packings during or after Installation
(2) Inspection. Visually inspect each V-ring
packing for cuts, nicks, or flaws before installation, and
discard when any evidence of these effects is present
(3) Installation Figure 4-71 shows V-ring
packings In various stages of installation. Prior to
Installation, immerse V-ring packings in hydraulic fluid,
MILH-5606 or MIL-H-83282.
(a) Installation over threads. Protect V-ring packing
lips when ring is Installed over threads of similar
projections, as shown In figure 4-71
Figure 4-64. Dual Internal O-Ring Removal
Figure 4-65. External O-Ring Removal (Spoon-
Type Tools)
Figure 4-66. External O-Ring Removal (Wedged-
Type Extractor)
4-83
