79-21-17
 ALL  ú ú N03 Page 407 ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(d)  
Remove four bolts (12) and two washers (11) that attach the main bearing strainer housing (10) and brackets (29, 30) to top of the fuel/oil cooler.

 (e)  
Reposition the bracket on the inboard side of the main bearing strainer housing with the W5 harness attached and remove the main bearing strainer housing (10).

 S 034-013-N00
 (8)  
Remove the packings from the tubes and strainer housing flange and discard.

 S 424-014-N00

 (9)  
Install protective covers.

 TASK 79-21-17-404-015-N00
 3. Install the Main Bearing Strainer Housing Assembly (Fig. 401)
__________________________________________________
 A. Consumable Materials
 (1)  
D00137 Engine Oil - PWA 521

 (2)  
A00456 Lubricant, Antigalling - PWA 550

 (3)  
D00247 Lubricant, Antigalling - PWA 586

 (4)  
D00453 Compound, Antigalling - PWA 36035

 (5)  
D00504 Petrolatum - PMC-9609

 (6)  
G02332 Ferrule, Safety Cable (P05-292)

 (7)  
G02334 Lockwire, (P05-289) 0.032 inch (0.813 mm) - AS3214-02

 (8)  
G02335 Cable, Safety (P05-291)

 B.
References

 (1)  
AMM 12-13-01/301, Engine - Servicing (Oil Replenishing)

 (2)  
AMM 71-11-04/201, Fan Cowl Panels

 (3)  
AMM 71-11-06/201, Core Cowl Panels

 (4)  
AMM 78-31-00/201, Thrust Reverser System

 C.
Access

 (1)  
Location Zones
 412 Engine 1 - HPC Case 9 o'clock
 422 Engine 2 - HPC Case 9 o'clock
 432 Engine 3 - HPC Case 9 o'clock
 442 Engine 4 - HPC Case 9 o'clock

 (2)  
Location Zones
 415 Left Thrust Reverser Half - Engine 1
 425 Left Thrust Reverser Half - Engine 2
 435 Left Thrust Reverser Half - Engine 3
 445 Left Thrust Reverser Half - Engine 4

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 79-21-17
 ALL  ú ú N03 Page 408 ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
D. Procedure
 S 434-016-N00
 (1)  Install the main bearing strainer housing:
 (a)  
Remove protective covers.

 (b)  
Lubricate the threads of the two largest adapters (front and rear of strainer housing) with Antigalling Compound (PWA 550).

 (c)  
Lubricate the threads of the smaller adapter (inboard side of the strainer housing) with Antigalling Compound (PWA 586).

 (d)  
Install the packing, lubricated with Engine Oil, and retainer to the No. 1, 1.5 and 2 main bearing oil pressure tube (8).

 (e)  
Install the packing (9), lubricated with Engine Oil, to the groove in the flange of the main bearing strainer housing (10).

 (f)  
Install the main bearing strainer housing (10) to the top of the fuel/oil cooler and engage the tubes to the adapters.

 (g)  
Attach the main bearing strainer housing (10) to the fuel/oil cooler with four bolts (12), threads lubricated with Engine Oil, and two washers (11) and bracket (30) attached to the W5 harness (omit washers at bracket).

 (h)  
Tighten bolts (12) to 85-95 pound-inches (9.6-10.7 newton-meters).

 S 434-017-N00
 (2) Install the No. 1, 1.5, and 2 main bearing oil pressure tube (8).
 (a)  
Lubricate the nut threads on the No. 1, 1.5 and 2 main bearing oil pressure tube (8) with Antigalling Compound (PWA 550).

 (b)  
Install the No. 1, 1.5, and 2 main bearing oil pressure tube

 (8) to the main bearing strainer housing (packing and retainer at rearward end installed) handtight only.

 (c)  
Tighten the clamp bolt that attaches the No. 1, 1.5, and 2 main bearing oil pressure tube (8) to the Flange E bracket (6) to 36-40 pound-inches (4.1-4.5 newton-meters).

 (d)  
Tighten the forward tube nut to 675-750 pound-inches (76.3-84.7 newton-meters) and attach lockwire or safety cable and safety cable ferrule.
　
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