S 495-221-N00

 (17)
 Install the PWA 85498 Adapter to the mounting pad on the deoiler outlet tube on the main gearbox with the detail bolts.

 (a)  
Install the PWA 85498 Adapter so the larger threaded opening
 points away from the engine.

 (b)  
If the deoiler outlet tube (LB05) is still attached, use the
 PWA 85863 Adapter.

 S 495-222-N00
 (18)
 Attach the hoses from the CTE 6075 Vacuum Cart to the PWA 85498 or PWA 85863 adapter (Fig. 510C).

 S 795-223-N00

 (19)
 Set the gage reading on the CTE 6075 Vacuum Cart at PAMB minus 10 psi (69 kPa) or PAMB minus 20 inches (-508 mm) Hg.

 (a)  Make sure the airflow leakage rate in the No. 1, 1.5, 2, 3
 bearing compartment and the angle gearbox is not more than a
 maximum of 44 pounds/hour (20 kgs/hour).

 S 095-229-N00
 (20)
 Remove the vacuum hose, pressure line and CTE 6075 vacuum cart from the engine.

 S 095-224-N00

 (21)
 Remove the PWA 85863 or the PWA 85498 adapter from the deoiler outlet tube, and the PWA 85978 plug from the internal tube nut on the exhaust case at the 10:30 o'clock position.

 S 435-225-N00

 (22)
 Install the oil pressure tube (LP34) for the No. 4 bearing:

 (a)  
Remove the protection covers from the oil pressure tube (LP34).

 (b)  
Lubricate the threads of the tube nut on the oil pressure tube (LP34) with the Hi-t 650 or the Lubribont HT antigalling compound.

 (c)  
Install the oil pressure tube (LP34) to the internal tube nut on the exhaust case at the 10:30 o'clock position (Fig. 510, View A). 1) Tighten the tube nut with your hand.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
SEE  A 
MAIN GEARBOX 
DEOILER 
OUTLET TUBE 
FLANGE M 
BRACKET 
MAIN OIL 
FILTER TUBE  FWD 
ADAPTER 
(PWA 85863) 
A 

L-A4761
Engine Vacuum Test Adapter Figure 510C
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
TEST NO. 12 - ENGINE VACUUM TEST________________________________
 (d)  Install the last chance strainer element in the oil pressure
 tube (LP34) (Fig. 510, View B).
 (e)  Remove the protection cover from the oil pressure tube (LP33).
 (f)  Lubricate the coupling end of the oil pressure tube (LP33) and
 the packing with engine oil.
 (g)  Install the packing to the flanged end of the oil pressure tube
 (LP33) (Fig. 510, View B).
 (h)  Lubricate the threads of the two bolts, which attach the oil
 pressure tubes, with engine oil.
 (i)  Install the oil pressure tube (LP33) with the two bolts and
 nuts (Fig. 510, View B).
 1) Tighten the nuts with your hand.
 (j)  Tighten the two bolts to 36-40 pound-inches (4.1-4.5
 newton-meters).
 (k)  Tighten the internal tube nut on the exhaust case at the 11
 o'clock position to 270-300 pound-inches (30.5-33.9
 newton-meters).
 1) Install the lockwire or safety cable and safety cable
 ferrule to the internal tube nut.
 (l)  Install the spray shield to the inboard side of the connection
 for the oil pressure tube at the 10:30 o'clock position at the
 Flange P (Fig. 510, View B).
 1) Attach the spray shield with the hose clamps.
 2) Tighten the hose clamps to 15-18 pound-inches (1.7-2.0
 newton-meters).

 S 435-226-N00
 (23) ENGINES WITHOUT PW SB 79-75; Install the oil scavenge tube assembly (LR06) for the No. 4 bearing:
　
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