S 716-063

 (18)
 Set the SYSTEM SELECTOR valve handle to the OFF position.

 S 036-064

 (19)
 Disconnect the TYPE A hose from Test Set Fitting No. 2.

 S 036-065

 (20)
 Disconnect the TYPE A hose from the Bleed Air Regulator control pressure port.

 S 436-066

 (21)
 Connect the control pressure line to the Bleed Air Regulator.

 S 436-067

 (22)
 Install a Cap on Test Set Fitting No. 2.

 S 036-068

 (23)
 Remove the No. 4 and No. 5 Test Set Fitting Caps.

 NOTE: Test set fitting No. 5 will be a vent for test set
____
 gauge No. 2.

 S 036-069
 (24)
 Disconnect the TYPE A hose from Test Set Fitting No. 1.

 S 436-070

 (25)
 Connect the same TYPE A hose to Test Set Fitting No. 4.

 S 436-071

 (26)
 Install a cap on Test Set Fitting No. 1. (See Fig. 603 Sheet 2)

 S 216-072

 (27)
 Make sure these items are as follows:

 (a)  
Make sure shutoff valve No. 1 is in the Closed position

 (b)  
Make sure shutoff valve No. 4 is in the CLOSED position.

 (c)  
Make sure the differential selector is in the OFF position.

 (d)  
Make sure Test Set Fitting No. 1, 2, 3, and 6 are tightly installed.

 S 716-073
 (28) Turn the Primary Regulator clockwise until (50.0 | 5.0) psig. is indicated on the Primary System Gauge.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 36-11-05
 ALL  ú ú 01 Page 615 ú Jul 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

737-300/400/500
MAINTENANCE MANUAL

PORTABLE VALVE ACTUATING TEST SET (EXAMPLE)
BLEED AIR 
BLEED AIR  REGULATOR 
REGULATOR SUPPLY 
PRESSURE PORT 
TYPE 
A HOSE 

PRESSURE PORT REGULATOR CONTROL BLEED AIR  B
TO 450`F THERMOSTAT  LINE FROM BLEED (REF) AIR REGULATOR PRESSURE CONTROL 
PRSOV 
AFT 

TO PRECOOLER DUCT
MANUAL OVERRIDE AND POSITION INDICATOR
Bleed Air Regulator and PRSOV System Inspection/Check Figure 603 (Sheet 2)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 36-11-05
 ALL  ú ú 01 Page 616 ú Jul 15/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 716-074
 (29)
 Set the SYSTEM SELECTOR handle to the A position.

 S 716-075

 (30)
 Open TEST SET shutoff valves No. 2 and No. 3.

 S 716-076

 (31)
 Turn Pressure Regulator No. 1 clockwise until (19.0) inches of Hg. is indicated on Test Set Gauge No. 2.

 S 216-140

 (32)
 Examine the position indicator on the PRSOV.

 (a)  
If the position indicator is in the full-open position, go to H.(49).

 (b)  
If the position indicator is NOT in the full-open position, continue.

 S 716-077
 (33)
 Turn Pressure Regulator No. 1 counterclockwise until (0.0) psig. is indicated on Test Set Gauge No. 2.

 S 716-078

 (34)
 Set the System Selector in the OFF position.

 S 036-079

 (35)
 Disconnect the air sense line at the Tee-Fitting at the PRSOV.

 NOTE: This line runs from the the Tee-Fitting up to the
____
 firewall and into the strut.

 S 436-080
 (36)
 Install the MS21902-6 cap on the Tee-Fitting at the PRSOV.

 (37)
 Set the SYSTEM SELECTOR valve handle to the A position.

 S 716-081
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 36-11-05
 ALL  ú ú 01 Page 617 ú Jul 15/95
　
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