Section Il. EQUIPMENT DESCRIPTION AND DATA

TM 55-4920-426-13&P

Section Il. EQUIPMENT DESCRIPTION AND DATA

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PURPOSE

Provide a source of hydraulic pressure and fluid for testing and operating aircraft hydraulic systems and components.

The following service operation can be performed:

(1)

Test the aircraft system for internal and external leakage.

(2)

Drain, flush and refill the aircraft hydraulic system with micronically filtered hydraulic fluid.

Bleed air from aircraft hydraulic systems.

(3)

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CAPABILITIES

The test stand ia all weather operational. Operational at an angle of 8 degrees in any direction from horizontal.

Can deliver hydraulic fluid MIL-H-83282 or MIL-H-5606 at the rate of 10 gpm at pressures to 3000 psi and with

reduced flow, 5 gpm or less, at pressures of 3000 psi to 5000 psi.

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GENERAL DESCRIPTION

The test stand is a self-contained, mobile, testing unit enclosed in a steel weather-resistant cabinet mounted on

a four wheel trailer assembly. A hand operated mechanical type parking brake is provided which acts upon the

rear wheels, holding the test stand in a fixed position during test operation or when parking on a grade. A hinged

towbar permits towing by vehicle at speeds up to 20 miles per hour. Removable side housings permit access

to all parts within the cabinet. Operator controls and instruments are located at the rear of test stand. Two lifting/tie-

down fittings are on front and rear of the test stand. External hose connections and hoses for connection to the

aircraft are located on the front of the test stand. The major components of the test stand are shown in Figures

1-4, 1-5, and 1-6.

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