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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
G83426G83429
SEE  E  HPC SECONDARY FLOW CONTROL VALVE (REF) 
FWD 
SEE  D  SEE  F 
FUEL/OIL COOLER (REF)  D  5 
FWD 
COOLING AIR MANIFOLD 
SEE  F  D  6  31. COOLING AIR TUBE  29. BRACKET 
10. MAIN BEARING STRAINER HOUSING 
6 5  ENGINES WITHOUT PHASE 3 ENGINES WITH PHASE 3  30. BRACKET  E  5  FWD 
Figure 401 (Sheet 3) Main Bearing Strainer Housing Installation 

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
12. BOLT
10. MAIN BEARING (4 LOCATIONS) STRAINER HOUSING
TEE 4. GEARBOX34. OIL PRESSURE OIL TUBEINDICATION TUBE
33. ELBOW
9. PACKING
32. PACKING FWD
F5
12. BOLT (4 LOCATIONS)
10. MAIN BERAING STRAINER HOUSING 35. PACKING
TEE
4. GEARBOX OIL TUBE
34. OIL PRESSURE
INDICATION TUBE

36. RETAINER
32.
PACKING

33.
ELBOW

9. PACKING FWD
F6
Main Bearing Strainer Housing Installation Figure 401 (Sheet 4)
G83431
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
1)  Remove the lockwire or safety cable and disconnect the No. 3 bearing oil pressure manifold (1) from the rear of the main bearing strainer housing (10).
 2) Remove the hose clamp (13), spray shield (14), and lockwire or safety cable. 3) Disconnect the No. 3 bearing oil pressure manifold (1) from the front of the No. 3 bearing oil pressure tube (15). 4) Remove the attaching hardware and remove the No. 3 bearing oil pressure tube (15).
 (b)  ENGINES WITH PW SB 79-52; Do the steps that follow: 1) Remove the lockwire or safety cable and disconnect the
 No. 3 bearing oil pressure manifold (1) from the rear of the main bearing strainer housing (10). 2) Remove the bolt (28), clamp and spray shield (21) from the rear of the No. 3 bearing oil pressure manifold (1). 3) Disconnect the No. 3 bearing oil pressure manifold (1) from the front of the No. 3 bearing pressure tube (15). 4) Remove the attaching hardware and remove the No. 3 bearing pressure tube (15) from the engine.
 S 034-010-N00
 (5)  
Remove lockwire or safety cable and disconnect gearbox oil pressure manifold (4) from inboard side of main bearing strainer housing (10).

 S 034-011-N00

 (6)  
Remove the No. 1, 1.5, and 2 main bearing oil pressure tube (8):

 (a)  
Remove lockwire or safety cable and disconnect No. 1, 1.5, and 2 main bearing oil pressure tube (8) from front of main bearing strainer housing (10) and the strainer housing (5) attached to the Flange E bracket (6).

 (b)  
Loosen the clamp bolt which attaches the No. 1, 1.5, and 2 main bearing oil pressure tube (8) to the Flange E bracket (6).

 (c)  
Remove the No. 1, 1.5, and 2 main bearing oil pressure tube (8) from the engine.

 S 034-012-N00
 (7)  Remove the main bearing strainer housing (10):
 (a)  
Disconnect the oil pressure indication tube (34) from the tee.

 (b)  
Remove the oil pressure indication tube (34) and elbow (33) from the main bearing strainer housing (10).

 (c)  
Disconnect the cooling air tube (31) from the cooling air manifold.

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