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MIL-T-60694B
4.4.3 Piston rod retraction. Each piston rod and body subassembly shall be subjected to a static
compression load application. Failure to comply with the requirement of 3.4.3 shall be cause for rejection of
the subassembly.
4.4.4 Fluid leakage. Each thruster shall be subjected to a leakage test. Failure of any thruster to comply
with the requirement of 3.4.4 shall be cause for rejection of the thruster.
4.4.5 Protective finish. The number of units for protective finish tests shall be in accordance with the
applicable specification. Failure of any unit in the inspection sample to comply with the requirements of the
applicable specification shall be cause for rejection of the lot.
4.4.6 Residual magnetism. Each assembly shall be subjected to the test for excessive residual
magnetism as specified in 4.5.5. Failure of any unit in the inspection sample to comply with 3.4 shall be cause
for rejection of the assembly.
4.4.7 Shear pin strength. Fifty pins of each type from each lot of shear pins shall be tested for shear
strength. Failure of any shear pin to comply with 3.5 shall be cause for rejection of the lot.
4.5 Test methods and procedures.
4.5.1 Hydrostatic pressure. Prior to application of protective finish the body shall be mounted in the
device, using a fixture for properly sealing all openings, and subjected to the internal hydrostatic pressure to
determine compliance with 3.2.
4.5.2 Breakaway torque. A torque wrench set at the requirement as specified in 3.6.1.2 shall be used
in conjunction with a fixture to determine the adequacy of the joint. The thruster body shall be secured in an
air vise or other holding fixture. The torque shall be applied to the ring nut.
4.5.3 Piston rod retraction. After assembly of the piston rod into the body and the torque has been
applied to the ring nut, the static compression load as specified in 3.6.2 shall be applied between the mounting
points of the thruster.
4.5.4 Fluid leakage. The thruster shall be placed on paper or any material that will show oil fluid
markings. The thruster shall be tested as specified in 3.6.3.1 and 3.6.3.2. The test shall be performed after the
piston rod and ring nut have been assembled into the thruster, but prior to installation of the reservoir
assembly.
4.5.5 Protective finish. Test procedures for protective finish shall be in accordance with the applicable
specification referenced on the applicable drawing.
4.5.6 Residual magnetism. The assembly shall be tested for excessive residual magnetism using an
approved compass in an area free of local magnetic effects by placing the assembly 5 inches from the end and
at the same height as the compass, in a north-south horizontal position (cap end at south) with the compass
set in an east-west heading. The assembly shall be moved at a speed no greater than 10 feet per minute past
the compass for its entire length, rotated 90 degrees in the horizontal position about its longitudinal axis and
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