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Figure 2-2.  Instrument Panel Assy, D-6A
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TM-1-4920-446-13P Hydraulic System Test Stand Type D-8A P/N 7459 Manual
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SECTION III.  AIRCRAFT FILL AND TEST PROCEDURES
TM 1-4920-446-13 & P Table 2-2.  Control Settings Control Position Fluid Pressure Gauge Shutoff (16) Selector Valve (8) Pressure Compensator Valve (15) Outlet Selector Valve ( 14) HP Relief Valve (10) Flow Limit Adjust (11) HP Bypass Valve (7) One quarter turn from fully open LP filter in position Adjusted to lowest pressure setting (rotated fully counter- clockwise) Closed Completely counterclockwise Set to zero flow (rotated fully clockwise) Open (rotated fully counterclockwise) i.  Adjust flow limit adjust control (11) to obtain a flow of 10 gallons per minute (gpm) as indicated on flowmeter (17). j.  Observe  fluid  flow  meter  (17) .  Erratic  needle  movement  indicates  air presence.  If air is entrapped, inter- mittently activate the bleed valve control to remove air (paragraph 1-19). k.  Decrease the hydraulic fluid flow to a minimum using the flow limit adjust (11, Figure 2-2). NOTE HP relief valve (10) must always be set 200/250 psi higher than compensator control (6) to achieve proper flow con- ditions. l.  Adjust compensator shutoff valve  (6) and HP  relief valve  (10) for correct pressure for the test to be run. m.  Shut down test stand and stop the HP pump in accordance with paragraph 2-8. 2-8.   Shutting Down  the Test Stand.  After making the preliminary adjustments to ensure the test stand is functioning properly or following a test or fill operation, the stand may be shut down by the following steps: a.  Open HP  relief valve (10) by turning completely counterclockwise. b.  Open the HP  bypass valve (7). c.  Depress stop button (26). 2-7

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