(3 LOCATIONS)
SEE B
2.9 BLEED VALVE SOLENOID
EEC SPEED TRANSDUCER (N1) (REF)
FWD
INTERMEDIATE
CASE

A

Stability Bleed Pneumatic Relay Valve Installation
Figure 401 (Sheet 1)

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SEE  B  NUT (3 REQUIRED) 
STABILITY BLEED PNEUMATIC RELAY VALVE 
BLEED AIR VALVE BRACKET  1 GASKET (EXAMPLE) 
ADAPTER (SMALLER) 
ADAPTER (LARGE) 
ADAPTER (MIDDLE) 

(3 REQUIRED) BOLT 
1  WHEN THE RELAY VALVE IS REMOVED BRACKET IS ATTACHED TO THE ENGINE  B  0590 L-A2473 
Figure 401 (Sheet 2) Stability Bleed Pneumatic Relay Valve Installation 

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(b)  Remove the relay valve from the bracket.
 S 024-022-N00
 (3)  
If it is necessary to replace the relay valve, do the steps that follow:

 (a)  
Remove the three adapters and gaskets from the relay valve. 1) Discard the gaskets.

 S 024-023-N00
 (4)  Install protection caps on the openings of the relay valve and the tubes.
 TASK 75-32-05-404-010-N00
 3. Install the Stability Bleed Pneumatic Relay Valve
_________________________________________________
 A. Consumable Materials
 (1)  
D00390 Oil - Engine

 B.
References

 (1)  
AMM 75-32-04/401, 2.9 Bleed Valve Solenoid

 (2)  
IPC 75-32-04 Fig. 1

 C.
Access

 (1)  
Location Zone 412 Engine 1 - Intermediate Case Aft Face 5 o'clock 422 Engine 2 - Intermediate Case Aft Face 5 o'clock 432 Engine 3 - Intermediate Case Aft Face 5 o'clock 442 Engine 4 - Intermediate Case Aft Face 5 o'clock

 (2)  
Access Panel
 416 Right Thrust Reverser Half - Engine 1
 426 Right Thrust Reverser Half - Engine 2
 436 Right Thrust Reverser Half - Engine 3
 446 Right Thrust Reverser Half - Engine 4

 D.
Procedure (Fig. 401)

 S 424-024-N00
 (1)  
Remove the protection caps.

 S 424-025-N00

 (2)  
If it was necessary to replace the relay valve, do the steps that follow:

 (a)  
Lubricate the threads of the three adapters with engine oil.

 (b)  
Install the three adapters with the gaskets to the threaded ports of the relay valve.

 (c)  
Tighten the largest adapter to 150-170 pound-inches (16.9-19.2 newton-meters).

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(d)  
Tighten the middle adapter to 110-120 pound-inches (12.4-13.6 newton-meters).

 (e)  
Tighten the smallest adapter to 65-75 pound-inches (7.3-8.5 newton-meters).

 S 424-026-N00
 (3)  Install the relay valve.
 (a)  
Put the relay valve on the bracket with the adapters up.

 (b)  
Lubricate the threads of the three bolts, which attach the relay valve, with engine oil.

 (c)  
Attach the relay valve to the bracket with the three bolts and nuts. 1) Tighten the bolts to 85-95 pound-inches (9.6-10.7

 newton-meters).
 S 414-015-N00
 (4)  Install the solenoid for the 2.9 bleed valve (AMM 75-32-04/401).
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