(a)  11D31, HYDRAULIC PTU CONT
 S 864-051
 (3)  
Supply electrical power (AMM 24-22-00/201).

 S 864-052

 (4)  
Pressurize the right hydraulic system (AMM 29-11-00/201).

 S 864-053

 (5)  
Put the manual control switch for the PTU on the right side panel, P61, to the ON position.

 S 794-055

 (6)  
Make sure there are no leaks at the filter module.

 S 864-056

 (7)  
Put the manual control switch to the OFF position.

 S 114-057
 CAUTION: QUICKLY CLEAN THE INSTALLATION AREA OF ALL HYDRAULIC FLUID.
_______ HYDRAULIC FLUID CAN CAUSE DAMAGE TO THE AIRPLANE EQUIPMENT.
 (8)  
Clean all hydraulic fluid from the installation area
 (AMM 12-25-01/301).

 (9)
Fill the reservoir in the left hydraulic system (AMM 12-12-01/301).

 S 614-058
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757
MAINTENANCE MANUAL

 S 094-059 WARNING: USE THE PROCEDURE IN AMM 32-00-15/201 TO REMOVE THE DOOR LOCKS.
_______ THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (10)
 Remove door locks from the landing gear doors and close the doors (AMM 32-00-15/201).

 S 864-060

 (11)
 Remove hydraulic power if it is not necessary (AMM 29-11-00/201). S 864-061

 (12)
 Remove electrical power if it is not necessary (AMM 24-22-00/201).

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 ALL  ú ú 02 Page 409 ú May 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 POWER TRANSFER UNIT (PTU) CONTROL VALVE - REMOVAL/INSTALLATION
______________________________________________________________
 1.  General
_______
 A.  This procedure has two tasks. One task removes the control valve for the power transfer unit (PTU). The other task installs the control valve.
 TASK 29-22-03-004-001
 2.  Remove the Control Valve (Fig. 401)
________________________
 A.  References
 (1)  
AMM 29-11-00/201, Main (Left, Right, and Center) Hydraulic Systems

 (2)  
AMM 32-00-15/201, Main Gear Door Locks

 (3)  
AMM 32-00-20/201, Landing Gear Downlocks

 B.  Access
 (1)  Location Zone
 144 Right MLG Wheel Well

 C.  Procedure
 S 494-002
 (1)  Make sure the downlocks are installed on the nose and main landing gear (AMM 32-00-20/201).
 S 494-003
 WARNING: DO THE PROCEDURE IN AMM 32-00-15/201 TO INSTALL THE DOOR LOCKS.
_______ THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (2)  
Open the doors for the landing gear and install the door locks (AMM 32-00-15/201).

 S 864-004

 (3)  
Remove the pressure from the right hydraulic system and the reservoir (AMM 29-11-00/201).
　
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