(a)  11D31, HYDRAULICS PTU CONT
 S 865-316
 (3)  Remove electrical power if it is not necessary (AMM 24-22-00/201).
 TASK 29-11-00-705-355
 6. Operational Test - Engine Driven Pump Pressure Switch
______________________________________________________
 A. References
 (1)  AMM 24-22-00/201, Electrical Power
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 29-11-00
 ALL  ú ú 07 Page 534 ú May 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

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

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

 (4)  
AMM 71-00-00/201, Power Plant - General

 B. Access
 (1)  Location Zones
 211/212 Control Cabin
 143/144 Main Landing Gear Wheel Well

 C. Procedure
 S 845-341
 (1)  
Supply electrical power (AMM 24-22-00/201).

 S 845-342

 (2)  
Make sure the downlocks are installed on the nose and main landing gear (AMM 32-00-20/201).

 S 495-343
 WARNING: OBEY THE INSTALLATION PROCEDURE FOR THE DOOR LOCKS.
_______ THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (3)  
Open the doors for the landing gear and install the door locks (AMM 32-00-15/201).

 S 845-344

 (4)  
Make sure both engines are off (AMM 71-00-00/201).

 S 845-345

 (5)  
Put these switches, on the hydraulic control panel, in the ON position:

 (a)  
L and R HYD PUMPS ELEC

 (b)  
C HYD PUMPS ELEC 1 and 2.

 (c)  
R HYD PUMP ENG

 S 845-346
 (6)  
Put the L HYD PUMP ENG switch on the hydraulic control panel to the OFF position.

 (7)
Operate the right engine at minimum power (AMM 71-00-00/201).

 S 715-356

 (8)  
Listen to the power transfer unit to make sure it operates smoothly and allow it to run for 10 to 15 seconds.

 S 845-347
 (a)  Make sure the control valve of the power transfer unit is in POS 1 (open position).
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