TYPE A PRESSURE HOSE
TEST SET
FITTING NO. 4
High Stage Regulator and High Stage Valve System Inspection/Check Figure 604 (Sheet 1)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
S 716-103
(8) Turn the No. 1 pressure regulator counterclockwise until (0.0) psig. is indicated on test set gauge No. 3.
NOTE: Steps I.(7) and I.(8) are completed to exercise the valve.
____
S 216-142
(9) Slowly turn the No. 1 pressure regulator clockwise to a maximum pressure of (10.0) psig. Monitor the pressure and the position indicator on the high stage valve.
(a)
If the position indicator is NOT in the full-open position by
(10.0) psig, replace the high stage valve (AMM 36-11-85/401), then go to step I.(10).
(b)
If the position indicator is in the full-open position by
(10.0) psig, continue.
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(10)
Turn the No. 1 pressure regulator counterclockwise until (0.0) psig. is indicated on test set gauge No. 3.
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(11)
Set the SYSTEM SELECTOR handle to the OFF position.
S 036-106
(12)
Disconnect the TYPE A hose from the control pressure line.
(13)
Remove the MS21902-6 Union from the control pressure line.
(14)
Connect the control pressure line to the High Stage Regulator.
(15)
Remove the relief valve at test port B on the High Stage Regulator.
S 036-107
S 436-108
S 426-109
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737-300/400/500MAINTENANCE MANUAL
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(16)
Install the AN815-4D Union with a MS29513-12 O-ring into the High Stage Regulator relief valve port B.
S 426-111
(17)
Remove the cap from test set fitting NO. 2.
S 436-112
(18)
Connect a TYPE B hose between the AN815-4D Union and the Test set.
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(19)
Disconnect the supply pressure line to the High Stage Regulator.
S 436-114
(20)
Connect the -6 end of the hose which is connected to test set fitting No. 4 to the supply pressure port on the High Stage Regulator. (See Fig. 604 Sheet 2)
S 716-115
(21)
Set the SYSTEM SELECTOR handle to the A position.
S 716-116
(22)
Turn the NO. 1 pressure regulator clockwise until (36.0 | 1.0) psig. is indicated on test set gauge No. 3.
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(23)
Examine the control pressure shown on Test Set Gauge No. 4.
(a)
If the control pressure is NOT (15.0 | 2.0) psig for high stage regulator P/N 107484-3 or (16.5 | 1.0) psig for high stage regulator P/N 107484-5 or P/N 107484-6, replace the high stage regulator (AMM 36-11-86/401), then go to step I.(36).
(b)
If the control pressure is (15.0 | 2.0) psig for high stage regulator P/N 107484-3 or (16.5 | 1.0) psig for high stage regulator P/N 107484-5 or P/N 107484-6, then remove downstream line on regulator. 1) If leakage is found, replace the high stage regulator
(AMM 36-11-86/401), then go to step I.(36).
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ALL ú ú 01 Page 622 ú Jul 12/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500
MAINTENANCE MANUAL
PORTABLE VALVE ACTUATING TEST SET (EXAMPLE)
HIGH STAGE
REGULATOR
SEE B AN815-4D UNION
CONTROL PRESSURE LINE HIGH STAGE REGULATOR
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