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TM 750-245-4
(2) Coupling nuts.
(b) Secured
(a) Torqued
(7) Lines, units, and supports.
(b) Torque stripped
(a) Pits
(3) Reservoirs.
(b) Corrosion
(a) Fluid leakage
(c) Sharp corners
(b) Proper fluid level
(d) Vibration
(4) Flares for correct angle.
(e) Leaks
(5) B-nuts.
(8) Fitting joints and seals for leaks.
5-7. Identification
(a) Not cracked
Component must be properly identified by stamping or
(b) Damaged hex-heads
nameplate and, if possible, placed in a sealed plastic
(6) Lines.
container for on-the-shelf storage.
(a) Properly routed
Section III. PNEUMATIC COMPONENTS
5-8. General
(2) Fittings and clamps.
Pneumatics is a branch of mechanics that deals with the
(a) Securely mounted
mechanical properties of gases.
(b) Machined surfaces free of burrs and
longitudinal marks
5-9. In-Process Inspection
(c) Sealing surfaces-smooth
Insure that only new precleaned o-rings and gaskets are
(d) Unmachined surfaces-cracks, laps,
used. Cure dates shall be within specified tolerances.
seams
(3) Castings.
5-10. Final Inspection
(a) Blow holes
a. Operation Test.
(b) Porosity
(1) Hoses.
High-pressure hoses must
withstand 125 percent of the rated operating pressure
(c) Cracks
for a minimum of one minute without showing defects
(4) Welds.
(i.e., leaks, unequal expansion, cuts, or breaks).
(a) Pits
(2) Receivers. All air receivers subject to a
(b) Blisters
working pressure in excess of 500 psi must be subjected
(c) Slivers
to hydrostatic test at least equal to one-and-one half
(d) Corrosion
times the working pressure.
(e) Excess flux
b. Visual Inspection.
(5) Coupling nuts.
(1) Hoses and covers.
(a) Properly torqued
(a) Cuts
(b) Torque stripped
(b) Cracks
(6) Gages, safety valves, and unloaders.
(c) Checked
Check for proper operation. Gages will not vary more
(d) Hardened
than two percent from normal operating pressure.
(e) Rotted
(f) Contaminated with dirt, grease, and
5-11. Identification
foreign objects.
Markings, warnings, and identifications shall be correct
and legible.
5-2
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