NOTE: The clamps are located just above the fuel/oil cooler.
____ The clamps can stay with the tube and manifold
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 79-21-16
 ALL  ú ú N01 Page 409 ú Jun 10/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
CAUTION: YOU MUST USE THE WRENCHING FLATS ON THE PARTS THAT ARE
_______ CONNECTED WHEN YOU LOOSEN MANIFOLDS AND TUBES. IF YOU DO NOT DO THIS, YOU CAN TWIST THE TUBE AND CAUSE DAMAGE TO THE TUBE.
 (g)  
Remove the lockwire from the tube nuts on the oil trim pressure tube (16). 1) Disconnect the tube nuts.

 (h)  
Remove the lockwire from the tube nut on the No. 3 bearing oil pressure manifold (12).

 NOTE: The manifold is attached to the bearing strainer element
____ housing on top of the fuel/oil cooler.
 1) Remove the retainer and packing and discard them. 2) Remove the oil trim pressure tube (16).
 (i)  
With the No. 3 bearing oil pressure manifold (12) sufficiently loose, remove the adapter (6) from the No. 3 bearing oil pressure tube (9 ). 1) Remove the packing from the adapter.

 (j)  
Remove the strainer (8) from the ferrule end of the tube (9).

 (k)  
Install the protective covers.

 S 214-083-N00
 (2)  
Do an inspection of the strainer (AMM 72-00-00/201).

 (a)  
Clean the strainer if it is necessary.

 TASK 79-21-16-004-007-N00
 4. Remove the Main and Angle Gearbox Last Chance Oil Strainer (Fig. 401)
__________________________________________________________
 A. Special Tools and Equipment
 (1)  
PWA 85518 - Puller, Pratt & Whitney, Commercial
 Products Division 400 Main Street,
 East Hartford, CT 06108

 B.
Standard Tools and Equipment

 (1)  
Container - 1 U.S. gallon (4 liter) capacity,
 used to catch the oil

 C.
References

 (1)  
AMM 71-11-04/201, Fan Cowl Panels

 (2)  
AMM 71-11-06/201, Core Cowl Panels

 (3)  
AMM 78-31-00/201, Thrust Reverser System

 (4)  
IPC 79-21-02 Fig. 20

 D.
Access

 (1)  
Location Zone
 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

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 79-21-16
 ALL  ú ú N01 Page 410 ú Jun 10/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(2)  
Access Panel
 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

 E.
Prepare to Remove the Last Chance Oil Strainer

 S 014-046-N00
 (1)  Open the left fan cowl panel (Ref 71-11-04/201).
 S 014-070-N00
 WARNING: DO THE THRUST REVERSER DEACTIVATION PROCEDURE TO PREVENT THE
_______
 OPERATION OF THE THRUST REVERSER. THE ACCIDENTAL OPERATION OF
 THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO
 EQUIPMENT.

 (2)  
Do this procedure: Thrust Reverser Deactivation for Ground
 Maintenance (Ref 78-31-00/201).

 S 014-047-N00

 (3)  
Open the left core cowl panel (Ref 71-11-06/201).

 S 014-071-N00
 WARNING: OBEY THE INSTRUCTIONS IN 78-31-00 WHEN YOU OPEN THE THRUST
_______
 REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO
 PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.

 (4)  
Open the left thrust reverser (Ref 78-31-00/201).

 F.
Remove the Last Chance Oil Strainer

 S 864-009-N00
 (1)  Put the container below the last chance oil strainer to collect the
　
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