Section III. PNEUMATIC COMPONENTS

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

(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

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

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

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.

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