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 B. Parts
 ~.............................................................................. | MM | | IPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT |FIG | ITEM | ................................................................................ | 401  |  1 | Power Transfer Unit | 29-22-01 | 01 | 70 | | | 6 | Packing | | | 65 | | | 8 | Packing | | | 30 | | | 10 | Packing | | | 45 | | | 16 | Packing | | | 55 | | | 20 | Packing | | | 55 | | | 22 | Packing | | | 45 | | | 26 | Packing | | | 30 | 2......…........…...................................…...........…....….........1
 C. References
 (1)  
AMM 12-12-01/301, Hydraulic Systems

 (2)  
AMM 12-25-01/301, Exterior Cleaning

 (3)  
AMM 24-22-00/201, Electrical Power

 (4)  
AMM 27-51-00/201, Trailing Edge Flap System

 (5)  
AMM 29-11-00/201, Main (Left, Right, and Center) Hydraulic Systems

 (6)  
AMM 32-00-15/201, Main Gear Door Locks

 D. Access
 (1)  Location Zone
 143 Left MLG Wheel Well

 E. Procedure
 S 644-013
 (1)  
Apply hydraulic lubricant or hydraulic fluid to the threads of the unions (5, 7, 9, 15, 19, 21, and 25), and the packings (O-rings) (6, 8, 10, 16, 20, 22, and 26).

 S 434-014

 (2)  
Install the unions (5, 7, 9, 15, 19, 21, and 25), and the packings (O-rings) (6, 8, 10, 16, 20, 22, and 26).

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757 MAINTENANCE MANUAL
 (3)  S 424-015Move the PTU (1) to its position through the space supplied by the removal of hydraulic lines (27, 29, and 30).
 NOTE:____ This is the space between the forward bulkhead of the wheel well and the power drive unit for the trailing edge flaps.
 (4)  S 424-016Hold the PTU (1) on the mounting bracket (4).
 (5)  S 424-017Install the bolts (2) and the washers (3).
 (6)  S 434-019Connect the hydraulic lines (11, 12, 14, 18, 23, and 24) to the PTU.
 (7)  S 414-020Install these hydraulic lines which you removed to supply clearance: (a) Install the hydraulic line (30) between the control valve and the flap bypass valve.
 NOTE:____ These valves are on the power drive unit for the trailing edge flaps.
 (b) (c)  Install the hydraulic lines (27 and 29) on the flow limiter valve, on the forward bulkhead of the left wheel well.If it is necessary, tighten the bolts which hold the flow limiter valve.
 (8)  S 864-040Supply electrical power (AMM 24-22-00/201).
 NOTE:____ EICAS must be operable to do the test of the PTU.
 (9)  S 864-021Make sure these circuit breakers on the overhead panel, P11, are closed: (a) 11D31, HYDRAULIC PTU CONT

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 S 864-041
 (10)
 Make sure the drain valve for the left reservoir is closed.
　
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