T51634
501
21-11-0 Page 102 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Jun 20/92
4. Test Set Procedures
A. General
(1) The following trouble shooting procedures are written to provide a maintenance level, go/no-go check of the modulating and shutoff valve, pressure regulator and pack valve without removing the component from the airplane.
B. Test Set Procedure No. 1 (Modulating and Shutoff Valve)
(1)
Gain access to modulating and shutoff valve and pressure regulator by opening right engine cowl.
(2)
Remove cap from test set fitting No. 6 (Fig. 101).
(3)
Remove plug from pressure regulator filter cavity test port (Fig. 102, Detail A) and install 290224-1 adapter in filter cavity test port of pressure regulator.
(4)
Connect test hose to test set fitting No. 6 and to adapter at filter cavity test port.
(5)
Open test set cylinder shutoff valve.
(6)
Turn test set primary regulator knob clockwise until a reading of 50 +5 psig is obtained on primary system gage.
(7)
Place SYSTEM SELECTOR valve handle to A.
(8)
Open SHUTOFF VALVE No. 2 and 3.
(9)
Turn No. 1 PRESS REG clockwise until a reading of 4.0 inches of mercury is obtained on GAGE No. 2. Check that modulating and shutoff valve butterfly begins to open or is full open by observing the valve position indicator (Fig. 102, Detail B).
(10)
Turn No. 1 PRESS REG clockwise until a reading of 8.0 inches of mercury is obtained on GAGE No. 2. Check that modulating and shutoff valve butterfly is full open by observing the visual indicator.
NOTE: If required limits in steps (9) and (10) have been obtained component is satisfactory. If these limits have not been obtained, replace modulating and shutoff valve.
(11)
Turn primary regulator knob and No. 1 PRESS REG counterclockwise until a zero pressure indication is obtained on primary system gage.
(12)
Close SHUTOFF VALVE No. 2 and 3.
(13)
Disconnect test hose from test set fitting No. 6 and from adapter at filter cavity test port of pressure regulator and stow.
(14)
Remove adapter from filter cavity test port of pressure regulator.
(15)
Install cap on test set fitting No. 6.
(16)
Close right engine cowl.
C. Test Set Procedure No. 2 (Pressure Regulator)
(1)
Gain access to pressure regulator by opening right engine cowl.
(2)
Open air conditioning equipment bay door to gain access to pack valve.
(3)
Remove caps from test set fittings No. 2 and 4 (Fig. 101).
(4)
Remove plug from pressure regulator filter cavity test port and install 290224-1 adapter in filter cavity test port of pressure regulator (Fig. 102, Detail A).
501
Aug 15/77 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 21-11-0 Page 103
H18522 F46467
Portable Valve Actuating Test Set 501
21-11-0 Figure 101 Aug 15/77
Page 104
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
501 Pressure Regulator and Modulating and Shutoff Valve
May 01/99 Figure 102 21-11-0
Page 105
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
(5)
Connect test hose to test set fitting No. 4 and to adapter at filter cavity test port.
(6)
Remove plug from gage test port of pressure regulator and install AN815-4D union in gage test port.
(7)
Connect test hose to test set fitting No. 2 and to union at gage test port.
(8)
Open test set cylinder shutoff valve.
(9)
Turn test set primary regulator knob clockwise until a reading of 65 +5 psig is obtained on primary system gage.
(10)
Place SYSTEM SELECTOR valve handle to A.
(11)
Turn No. 1 PRESS REG clockwise until a reading of 59 + 1 psig is obtained on GAGE No.
3.
(12)
Check that GAGE No. 4 has a regulated outlet pressure of 12 +3 psig.
(13)
Turn primary regulator knob and No. 1 PRESS REG counterclockwise to obtain a zero pressure indication.
(14)
Place SYSTEM SELECTOR valve handle to OFF.
(15)
Remove caps from test set fittings No. 1 and 7.
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