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 S 865-034
 (1)  Pressurize the right hydraulic system with a hydraulic service cart or the alternating current motor pump (ACMP) (AMM 29-11-00/201).
 NOTE: You cannot test the manual ground-control system for the
____ PTU if the you pressurize the right hydraulic system with the EDP. Operation of the right EDP with the left engine off will permit the automatic mode of the PTU to operate and bypass the manual ground-control system.
 S 865-035
 (2)  
Put the manual control switch for the PTU on the right side panel, P61, to the ON position.

 (3)
Listen to the PTU in the left wheel well to make sure it operates.

 S 865-038

 (4)  
Put the manual control switch for the PTU on the P61 panel to the OFF position.

 S 865-040

 (5)  
Remove the hydraulic power from the right hydraulic system
 (AMM 29-11-00/201).

 H.
Put the Airplane Back to Its Usual Condition

 S 215-037
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 29-22-00
 ALL  ú ú 01 Page 506 ú May 28/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
 S 495-308
 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.
 (1)  
Remove the door locks from the landing gear doors and close the doors (AMM 32-00-15/201).

 S 865-309

 (2)  
Remove electrical power if it is not necessary (AMM 24-22-00/201).

 TASK 29-22-00-735-078
 3. System Test - Power Transfer Unit (PTU) System (Fig. 501)
______________________________________________
 A. General
 (1)  This procedure does a test of the PTU system to make sure the system performance is satisfactory.
 B. Equipment
 (1)  
Hydraulic Service Cart, 0 to 3000 psi, with
 Hydraulic Fluid, Fire Resistant, BMS 3-11.

 (2)  
Stop Watch, Commercially Available

 C. References
 (1)  
AMM 12-12-01/301, Hydraulic Systems

 (2)  
AMM 24-22-00/201, Electrical Power

 (3)  
AMM 29-11-00/201, Main (Left, Right and Center) Hydraulic Systems

 (4)  
AMM 29-11-05/401, Engine-Driven Pump

 (5)  
AMM 32-00-15/201, Main Gear Door Locks

 (6)  
AMM 32-00-20/201, Landing Gear Downlocks

 (7)  
AMM 32-09-02/201, Air/Ground Relays

 D. Access
 (1)  Location Zones
 143/144 MLG Wheel Well
 211/212 Control Cabin

 E. Prepare for the System Test
 S 865-079
 (1)  
Supply electrical power (AMM 24-22-00/201).

 S 865-080

 (2)  
Remove the pressure from the left and right hydraulic systems and the reservoirs (AMM 29-11-00/201).

 S 495-081

 (3)  
Connect a hydraulic service cart to the ground power connections for the right hydraulic system (AMM 29-11-00/201).

 (4)  
Set the service cart pressure at zero psi.

 S 865-292
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