(16)
Disconnect test hose from test set fitting No. 4 and connect to test set fitting No. 1.
(17)
Remove plug from pressure regulator duct pressure line fitting (Ref Fig. 102) and install 290167 adapter. Tighten adapter 180-240 pound-inches. Connect hose from test set fitting No. 4 to adapter in duct pressure line port.
(18)
Remove filter cavity test port plug from pack valve and install 290395-1 adapter (Fig. 103). Connect hose from test set fitting No. 7 to adapter in filter cavity test port.
(19)
Place test set SYSTEM SELECTOR valve handle to B.
(20)
Open SHUTOFF VALVE No. 1 and 2.
(21)
Place DIFFERENTIAL SELECTOR valve handle to A.
(22)
Turn primary regulator knob clockwise until a reading of 60 +5 psig is obtained on primary system gage.
(23)
Turn PRESS REG No. 1 clockwise until a reading of 20 +1 psig is obtained on GAGE No.
3.
(24)
Using the manual control rod, manually open solenoid A on pack valve.
(25)
Turn PRESS REG No. 2 clockwise until a reading of 14.3 +0.1 inches of mercury is obtained on GAGE No. 2.
(26)
Check that GAGE No. 4 has a regulated outlet pressure of 21 +3.0 psig.
NOTE: If required limits in steps (12) and (26) have been obtained, pressure regulator is satisfactory. If these limits have not been obtained, replace pressure regulator.
(27)
Turn PRESS REG No. 1 and 2 counterclockwise until a zero pressure is obtained.
(28)
Turn primary regulator knob counterclockwise until a zero pressure is obtained on primary system gage.
501
21-11-0 Page 106 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Aug 15/78
F46663
506 Pack Valve
Feb 15/78 Figure 103 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 21-11-0 Page 107
(29)
Place DIFFERENTIAL SELECTOR valve handle to off.
(30)
Close SHUTOFF VALVE No. 1 and 2.
(31)
Manually close solenoid A on pack valve.
(32)
Disconnect all test set hoses and stow.
(33)
Remove 290395-1 adapter from pack valve and install filter cavity test port plug.
(34)
Remove 290167 adapter from pressure regulator and install duct pressure line connection.
(35)
Remove 290224-1 adapter from regulator filter cavity test port and install filter cavity test port plug.
(36)
Remove AN815-4D Union from gage test port and install gage test port plug.
(37)
Install caps on test set fittings No. 1, 2, 4 and 7.
(38)
Close test set cylinder shutoff valve.
(39)
Close air conditioning equipment bay door.
(40)
Close right engine cowl.
D. Test Set Procedure No. 3 (Pack Valve)
(1)
Open air conditioning equipment bay door to gain access to pack valve.
(2)
Install special purpose cable assembly (Fig. 103).
(3)
Remove caps from test set fittings No. 5 and 6 (Fig. 101).
(4)
Remove plug from pack valve filter cavity test port and install 290395-1 adapter in filter test port of pack valve (Fig. 103).
(5)
Connect test hose to test set fitting No. 6 and to adapter at pack valve.
(6)
Open test set cylinder shutoff valve.
(7)
Turn test set primary regulator knob clockwise until a reading of 35 +5 psig is obtained on primary system gage.
(8)
Place test set SYSTEM SELECTOR valve handle to A.
(9)
Using the manual control rod, manually open solenoid A on pack valve.
(10)
Open SHUTOFF VALVE No. 2 and 3.
(11)
Turn PRESS REG No. 1 clockwise until a reading of 17.0 inches of mercury is obtained on GAGE No. 2. Check that pack valve butterfly is full open by observing visual indicator.
(12)
Manually close solenoid A on pack valve.
(13)
Turn PRESS REG No. 1 counterclockwise until a zero pressure is obtained on GAGE No.
2.
(14)
Place test set SYSTEM SELECTOR valve handle to OFF.
(15)
Turn primary regulator knob counterclockwise until a zero pressure is obtained on primary system gage.
(16)
Disconnect test set hose from test set fitting No. 6.
(17)
Remove cap from test set fitting No. 1 and connect test set hose.
(18)
Remove plugs from pack valve venturi throat test port and downstream pressure test port and install 290166 adapters in both test ports (Fig. 103).
(19)
Connect test hose to test set fitting No. 5 and to adapter in the venturi throat test port.
(20)
Connect test hose to test set fitting No. 6 and to adapter in the downstream pressure test port.
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