Section IV. OPERATION INSTRUCTIONS - TM-55-4920-416-130016

TM 55-4920-416-13

Section IV

Paragraphs 4-1 to 4-4

SECTION IV

OPERATION INSTRUCTIONS

4-1. GENERAL.

WARNING

4-2. Operation procedures of the VPT-7A Vacuum-Pressure

Do not operate the tester unless all

Test Set are given in this section.

access panels are in place. Injury could

result from shattering of the glass

4-3. FUNCTION OF CONTROLS AND INDICATORS.

reservoir or other malfunction of the

tester.

4-4. DESCRIPTION. Operation of the VPT-TA Vacuum-

Pressure Test-set is simple if the functions of the various

controls and indicators are thoroughly understood. The

following paragraphs explain the functions of controls and

indicators on the test set's front and top panels. All operating

controls and indicators are illustrated in figures 4-1 and 4-2.

Vacuum Selector Valve

Power Switch

Pressure Selector Valve

Rate-of-Climb Indicator

Vacuum Decrease Valve

Altimeter

Vacuum Increase Valve

10.

Airspeed Indicator

Pressure Increase Valve

11.

Manifold Pressure Indicator

Pressure Decrease Valve

12.

Fuel Pressure Indicator

Figure 4-1. Operating Controls and Indicators

Change 1 11