SECTION III. TEST EQUIPMENT, SPECIAL TOOLS AND MATERIALS

TM 55-4940-353-13&P

furnished by the pump is monitored by two oil gages

hence the pump operation. The air pressure in this line

mounted on a manifold attached to the pump outlet port.

is adjusted by means of the air regulator. The other

One gage with a scale marked from 0 to 15000 psi in

valve is installed in the oil return line to the reservoir.

200 psi increments is used when high pressure testing is

This valve is closed during a test to pressurize the hose.

being performed. The other gage can be read in 50 psi

When the test is complete it is opened to allow the test

increments to 3000 psi. This gage is protected from

oil to return to the reservoir.

damage when high pressures exist in the manifold by a

gage saver adjusted to 2800 + 100 psig. A sight gage

1-8.

Adaptors. Sixteen adaptor fittings are furnished

installed in the oil return line allows the operator of the

with the Model 321 Hose Tester. These adaptors, which

Hose Tester to observe the return flow of oil to the

fit into the oil supply port of the gage manifold and the

reservoir.

oil return port on the oil control valve, enable the tester

to accommodate all hose assemblies MS28741-3

1-7.

Controls. Two needle valves control the

through MS28741-16 and MS28762-3 through

MS28762-16. Racks for storing the adaptors are

operation of the Hose Tester. One, installed in the line

integral parts of the tester.

to the air input port of the pump, controls that input and

SECTION III. TEST EQUIPMENT, SPECIAL TOOLS AND MATERIALS

MIL-H-5606 or MIL-H-82382o Clean ,SAE-10 oil or

1-9.

No special tools or test equipment are required

lighter grade should be used in the lubricator unit.

to operate or service the Model 321 Hose Tester. Test

oil must conform to

1-2