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 CAUTION: MAKE SURE THE OIL SYSTEM IS DRAINED BEFORE YOU ADD THE OIL.
_______ YOU WILL PUT TOO MUCH OIL IN THE ENGINE IF YOU USE THIS PROCEDURE WHEN THE OIL SYSTEM IS NOT DRAINED. IF YOU PUT TOO MUCH OIL IN THE OIL SYSTEM, YOU CAN CAUSE OIL TO GO INTO THE IP AND HP COMPRESSOR ROTOR DRUMS. THIS WILL CAUSE HIGH ENGINE VIBRATION.
 DO NOT REMOVE THE HIGH SPEED EXTERNAL GEARBOX CORE PLUGS TO DRAIN THE GEARBOX (THE CORE PLUGS HAVE CASTELLATED HEADS AND HAVE "KU" AND A FOUR DIGIT NUMBER WRITTEN ON THEM). IF YOU REMOVE THE CORE PLUGS TO DRAIN THE GEARBOX, THE GEARBOX WILL HAVE A LEAK AT THE CORE PLUGS AFTER YOU INSTALL THEM.
 (2)  Make sure the oil system is drained.
 S 943-034
 CAUTION: DO NOT USE THE GRAVITY FILL METHOD TO ADD THE OIL AFTER YOU
_______ REPLACE THE ENGINE MODULE 03. THE GRAVITY FILL METHOD DOES NOT REMOVE THE AIR FROM THE FCOC AND THE ENGINE MODULE 03.
 IF YOU USE THE GRAVITY FILL METHOD TO ADD THE ENGINE OIL AFTER YOU REPLACE THE ENGINE MODULE 03, THE INTERNAL GEARBOX BEVEL GEARS WILL BE DAMAGED DURING THE NEXT ENGINE START.
 (3)  Get the equipment for the method you will use to add the oil.
 G. Use the Pressure Fill Method to Add the Engine Oil (Fig. 302)
 S 013-051
 (1)
Remove the HP/IP turbine bearing MCD housing (AMM 79-21-03/401).

 S 613-023

 (2)  
Put the container under the MCD housing opening to catch the oil which will come out of the MCD housing opening when you do this procedure.

 S 013-024

 (3)  
Remove the cap from the priming connector on the oil pressure filter housing.

 (4)
Connect the pressure fill rig hose to the oil priming connector.

 S 613-026

 (5)
Use the pressure fill rig to add oil to the engine oil system.

 S 493-025
 (a)  Add the oil at a pressure of 17 - 27 psi.
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 ALL  ú ú 01 Page 310 ú May 28/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

SEE A
PRESSURE FILTER HOUSING
PRIMING CONNECTOR
CAP
FWD OIL PUMPS HOUSING (REF)
A
Engine Oil System Priming Connector
Figure 302

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 ALL  ú ú 01 Page 311 ú Mar 20/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

 CAUTION: DO NOT ADD MORE THAN 25 U.S. PINTS (11.8 LITERS) OF OIL.
_______ IF YOU ADD TOO MUCH OIL, YOU CAN PUT TOO MUCH OIL IN THE BEARING CHAMBERS. THIS CAN CAUSE OIL TO GO INTO THE IP AND HP COMPRESSOR ROTOR DRUMS, WHICH WILL CAUSE HIGH VIBRATION.
 (b)  
Add 23 - 25 U.S. pints (10.9 - 11.8 liters) of oil.

 (c)  
Add all the oil continuously; after you start to add the oil, do not stop until you add all the oil.

 (d)  
Approximately 1.8 U.S. pints (0.85 liters) of oil will come out of the HP/IP MCD housing opening when you add the oil.

 S 093-027
 (6)  
Disconnect the pressure fill rig hose from the priming connector on the oil pressure filter housing.

 S 413-028

 (7)  
Install the cap onto the priming connector.

 S 413-029

 (8)  
Safety the cap.

 S 613-030

 (9)  
Install the HP/IP bearing MCD housing and the MCD
 (AMM 79-21-03/401).

 S 613-031

 (10)
 Do this procedure:  Add Oil to the Engine Oil System (When Oil is in the System) to add 23-25 U.S. pints (10.9-11.8 liters) of oil.

 NOTE: Do not use the oil tank quantity sight glass to determine the
____ amount of oil you will add. If you add oil until the oil level in the oil tank oil quantity sight glass shows FULL, a large amount of oil will go out of the oil breather outlet duct the next time you start the engine.
 S 943-032
 (11) Put the Airplane Back To Its Usual Condition
 H. Use the Gravity Fill Method to Add the Engine Oil (Fig. 303)
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