For the hydraulic testing of hoses, take the following actions. Open the Plexiglas door on the hydraulic test chamber. Remove the plugs from the manifold ports. Select the proper size adapters for the hose lines being tested, and install them in the manifold ports. Connect the hose lines to be tested between the two manifolds. Close the hinged door at the top of the test chamber.

NOTE: The distance between the manifolds is adjustable for various hose lengths. Loosen the thumbscrews that secure the rear manifold and slide it backward or forward on the tracks to obtain the desired distance. For the pneumatic testing of hoses, take the following actions. Unlock the two side bolts that secure the pneumatic chamber in the retracted position. Pull out the chamber to the extended position and secure it with the two slide bolts. Unlatch and open the two doors at the top of the pneumatic chamber. Open the hinged screens inside the chamber. Select a suitable adapter and connect the hose to be tested to the connection in the chamber. Use a suitable plug to seal the opposite end of the test hose. Close the hinged screens. Close and lock the two doors at the top of the chamber.

Hose lines should be tested in accordance with the applicable military specification. Each hose specification gives proof test pressures and other pertinent data for that particular type of hose. Perform hydraulic testing as follows: Make all the preliminary adjustments and install the test hoses as described previously. Turn the selector valve to the oil boost pump position. Turn on the air supply shutoff valve. Slowly open the air pressure regulator until air-free oil passes through the fluid flow sight gauge; then close the manifold bleed valve. Increase the pressure on the test hoses to the specified value by adjusting the air pressure regulator until the desired pressure is indicated on the high-pressure oil gauges.

If pressure will exceed 2,000 psi, turn off the gauge shutoff valve. This shuts off the pressure to the 0-2,000 psi high-pressure oil gauge. Continue to read the 0-20,000 psi gauge. The test hoses may be observed through the Plexiglas window in the test chamber door while under test pressure. The pressure may be increased during test by adjustment of the air pressure regulator. 

To perform pneumatic testing, proceed as follows. Make all the preliminary adjustments and install the test hoses as described previously. Turn on the air booster inlet valve. Make sure that the air booster shutoff valve is turned on. Turn the selector valve to the air boost pump position. Turn on the air supply shutoff valve. Increase the pressure on the test hose by adjusting the air pressure regulator until the desired pressure is indicated on the high-pressure air gauge.

CAUTION 

Keep the test hose at test pressure for 2 minutes before turning on the water shutoff valve. A ruptured test hose, with water in the pneumatic chamber, could cause injury to personnel.

Turn on the water shutoff valve and fill to the level inside the test chamber. Observe the test hose for air leaks through the shatterproof glass windows at the top of the test chamber. Air bubbles rising in the water indicate a leaking hose or fitting. When you complete the hydraulic test, stop the operation of the test stand. Adjust the air pressure regulator for a zero reading on the regulated air pressure gauge. Shut the air supply shutoff valve. Open the manifold bypass valve. When the high-pressure oil gauge indicates a zero pressure, open the test chamber door and disconnect and remove the test hoses.

After you complete the pneumatic test, stop the operation of the test stand. Adjust the air pressure regulator for a zero reading on the regulated air pressure gauge. Shut off the air supply shutoff valve. Open the high-pressure air bleed valve. When the high-pressure air gauge indicates a zero reading, drain the water by means of the drain valve at the bottom of the chamber. Open the test chamber doors and disconnect the test hose.