D.
Remove the Main Bearing Strainer Housing Assembly.
NOTE: Be prepared to catch fuel and oil in a container with a
____
minimum capacity of 5 U.S. gallons (19 liters).
S 034-006-N00
CAUTION: YOU MUST USE WRENCHING FLATS ON THE MATING PARTS WHEN YOU
_______ LOOSEN OR TIGHTEN ANY OR ALL TUBE NUTS. IF YOU DO NOT DO THIS, YOU CAN TWIST THE TUBE AND CAUSE DAMAGE TO THE TUBE.
(1)
ENGINES WITH PW SB 79-52; Remove the bolt, nut and clamp that attach the oil trim pressure tube (3) to a bracket on the flange of the secondary flow control valve.
S 034-007-N00
(2)
Remove the bolt, nut and clamp that attach the oil trim pressure tube (3) to the bracket on the HPC cover.
S 034-008-N00
(3)
Remove the oil tube metering nipple (2).
(a)
Remove the lockwire or safety cable and use the wrenching flats to disconnect the tube nuts from the oil tube metering nipple
(2) .
(b)
Loosen the clamp bolts that attach the oil trim pressure tube
(3) .
(c)
Loosen the three bolts that attach the oil trim pressure tube
(3) to the main oil filter housing.
(d)
Remove the metering nipple (2).
S 034-009-N00
(4)
Remove the No. 3 bearing oil tube:
(a)
ENGINES WITHOUT PW SB 79-52;
Do the steps that follow:
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10. MAIN BEARINR STRAINER HOUSING
12. BOLT (4 LOCATIONS)
11. WASHER (2 LOCATIONS)
9. PACKING
SEE A
8. NO. 1,1.5 AND 2 1. NO. 3 BEARING 2. OIL TUBE
MAIN BEARING OIL OIL PRESSURE METERING 3. OIL TRIM
7. MAIN BEARING PRESSURE TUBE MANIFOLD NIPPLE PRESSURE
BREATHER TUBE TUBE
6. FLANGE E BRACKET
5. STRAINER
HOUSING SEE C
SEE B
4. GEARBOX OIL PRESSURE MANIFOLD
1. NO. 3 BEARING
A
OIL PRESSURE MANIFOLD
3. OIL TRIM PRESSURE
3. OIL TRIM TUBE
PRESSURE 1. NO. 3 BEARING TUBE OIL PRESSURE
MANIFOLD
B 1
1 ENGINES WITHOUT PW SB 72-211
B 2
L-B46612 ENGINES WITH PW SB 72-211 0297
Fuel/Oil Cooler Mounted Main Bearing Strainer Housing Figure 401 (Sheet 1)
G83425
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
13. HOSE CLAMP 14. SPRAY SHIELD
15.
NO. 3 BEARING OIL PRESSURE TUBE
16.
FLANGE K BRACKET
1. NO. 3 BEARING OIL PRESSURE MANIFOLD
17. NUT
20. BOLT
FWD
18.
PACKING
19.
LAST CHANCE STRAINER
C 3
BRACKET ON FLANGE OF COOLING AIR 21. SPRAY SHIELD
TUBE
25. NUT (2 LOCATIONS)
22.
ADAPTER
23.
PACKING 24. STRAINER
28. BOLT
27. BOLT (2 LOCATIONS)
1. NO. 3 BEARING OIL PRESSURE MANIFOLD
26. BOLT FWD
15. NO. 3 BEARING
OIL PRESSUREE
3 ENGINES WITHOUT PW SB 79-52 C 4 TUBE
4 ENGINES WITH PW SB 79-52 L-A5008 (0295)
Fuel/Oil Cooler Mounted Main Bearing Strainer Housing
Figure 401 (Sheet 2)
