(a)  
Remove the pressure relief valve (66) for the oil filter from the main oil filter housing (1). 1) Discard the packings (64 and 65).

 (b)  
Remove the reducers (49), inserts (51), and packings (50
 and 52) from the LP4 and LP5 ports on the top forward and
 inboard face of the main oil filter housing (1).
 1) Discard the packings (50 and 52).

 (c)  
Remove the plug (59) and insert (67) from the bottom port in
 the main oil strainer cover.
 1) Discard the packings (58 and 68).

 WARNING:_______CAREFULLY REMOVE THE MAIN OIL FILTER COVER. THE MAIN OIL FILTER COVER HAS SPRING PRESSURE ON IT. INJURY TO PERSONS CAN OCCUR WHEN YOU REMOVE IT.

 (d)  
Remove the nuts (81 or 72) and washers (61) that attach the main oil filter cover (29) to the main oil filter housing (1). 1) Remove the cover (29). 2) Discard the packing (57).

 (e)  
Remove the filter element (56) from the main oil filter
 housing (1).
 1) Discard the filter element (56).

 (f)  
Remove the screw (70), spring (69), and keywasher (71) from the cover (29). 1) Remove and discard the keywasher (71).

 (g)  
Remove the oil system pressure relief valve (21). 1) Remove the bolts (60) that attach the bracket and pressure relief valve (21) to the main oil filter housing (1). 2) Remove the bracket (30), and the pressure relief valve

 (21).
 3) Discard the packings (62 and 63).

 S 034-045-N00
 (18) ENGINES POST-PW-SB 72-524 AND POST-PW-SB 79-79;
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 72-61-11
 ALL  ú ú N01 Page 423 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
If you will install a new main oil filter housing (1), do the steps that follow (Fig. 402, View N):
 (a)  
Remove the pressure relief valve (66) for the oil filter from the main oil filter housing (1). 1) Discard the packings (64 and 65).

 (b)  
Remove the reducers (49), inserts (51), and packings (50 and 52) from the LP4 and LP5 ports on the top forward and inboard face of the main oil filter housing (1). 1) Discard the packings (50 and 52).

 (c)  
Remove the plug (59) and insert (67) from the bottom port in the main oil strainer cover. 1) Discard the packings (58 and 68).

 WARNING:_______CAREFULLY REMOVE THE MAIN OIL FILTER COVER. THE MAIN OIL FILTER COVER HAS SPRING PRESSURE ON IT. INJURY TO PERSONS CAN OCCUR WHEN YOU REMOVE IT.

 (d)  
Remove the bolts (81 or 72) and washers (61) that attach the main oil filter cover (29) to the main oil filter housing (1). 1) Remove the cover (29). 2) Discard the packing (57).

 (e)  
Remove the filter element (56) from the main oil filter housing (1). 1) Discard the filter element (56).

 (f)  
Remove the two screws (73) and washers (75) which hold the spring retainer (74) and spring (69) to the cover (29).

 (g)  
Remove the oil system pressure relief valve (21). 1) Remove the bolts (60) that attach the bracket and pressure relief valve (21) to the main oil filter housing (1). 2) Remove the bracket (30), and the pressure relief valve

 (21).
 3) Discard the packings (62 and 63).

 S 034-039-N00
 (19)
 ENGINES POST-PW-SB 72-525; If you will install a new main oil filter housing (1), do the steps that follow (Fig. 402, View O):

 (a)  
Remove the plug (77) from the main oil filter housing (1). 1) Discard the packings (64 and 65).

 (b)  
Remove the reducers (49), inserts (51), and packings (50 and 52) from the LP4 and LP5 ports on the top forward and inboard face of the main oil filter housing (1). 1) Discard the packings (50 and 52).

 (c)  
Remove the plug (59) from the bottom port in the main oil strainer cover. 1) Discard the packing (58).

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 72-61-11
 ALL  ú ú N01 Page 424 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
　
中國航空網(wǎng) m.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：747-400 AMM 飛機(jī)維護(hù)手冊 發(fā)動機(jī) ENGINE 2(150)