MIL-DTL-14055G
4.7.8.2 Procedure.
a. Disassemble the three cylinder assemblies and, using a lint-free cloth, wipe all fluid from the
cylinders, pistons, boots, and springs.
b. Cylinders or parts showing light stains or corrosion shall be discarded.
c. Assemble the six test cups into the wheel cylinders using a light film of brake fluid conforming to
MIL-PRF-46176 to completely coat the cylinder walls, cups, springs, and pistons.
d. Assemble the clean boots onto the cylinders to hold the pistons in position.
e. Leave one inlet hole open and close the remaining holes with a suitable rubber or metal plug.
f. Number the cylinders 1 through 3.
g. Adjust the humidity cabinet to 115°F (46°C) and 95 percent humidity.
h. Place the cylinders in the cabinet with open holes facing down.
i. Maintain the temperature and humidity at above levels for 16 hours.
j. Readjust the cabinet controls to 70°F (21°C) and 95 percent humidity and maintain these
conditions for 8 hours to complete the first cycle.
k. Repeat this 24-hour cycle for 12 days.
l. When the foregoing cycling is interrupted due to the incidence of one or more nonworking days,
the cups shall remain in the humidity cabinet with the cabinet controls set to maintain 70°F (21°C)
at 95 percent humidity until cycling is resumed on the following working day
m. For inspection purposes number 1 cylinder assembly shall be removed from the humidity cabinet
at the end of six cycles, number 2 cylinder assembly at the end of the 10 cycles and number 3
cylinder assembly at the end of 12 cyc1e.
n. In case this inspection would fall on a nonworking day, the inspection shall be made on the
following working day.
o. Cylinder assemblies shall be inspected as follows:
1. During removal from the humidity cabinet and subsequent disassembly, and inspection
operations, the cylinders shall be maintained in the same position as they were in the cabinet
to avoid fluid contamination of the inside of the cylinder.
2. The pistons and cups shall be removed from the cylinder by pulling them out from their
respective ends. Slight air (dry) pressure may be applied internally in the cylinder, if
necessary, to aid in the removal of cups and pistons.
3. To determine conformance to 3.4.7 inspect the cylinder bore under a strong light for
corrosion, discoloration, or spots, particularly noting the area of the fluid ring left by the lip of
the cup during its exposure in the humidity cabinet.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the
contract or order (see 6.2). When packaging of material is to be performed by DoD or in-house contractor
personnel, these personnel need to contact the responsible packaging activity to ascertain packaging
requirements. Packaging requirements are maintained by the Inventory Control Point's packaging activity
within the Military Service or Defense Agency, or within the Military Service's System Commands.
Packaging data retrieval is available from the managing Military Department's or Defense Agency's
automated packaging files, CD-ROM products, or by contacting the responsible packaging activity.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not
mandatory.)
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