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A

757
MAINTENANCE MANUAL

25.
 UNION

26.
 PACKING

1. POWER 
24. SUPPLY LINE OF  TRANSFER 
THE LEFT SYSTEM  UNIT 

21. UNION THE LEFT SYSTEM 23. PRESSURE LINE OF 22. PACKING
2.
 BOLT

3.
 WASHER (4 LOCATIONS)

4.
 MOUNTING

19.
 UNION

BRACKET
20.
 PACKING

5. UNION IN THE OUTLET FOR THE SUMP DRAIN18. CASE DRAIN LINE 6. PACKING FOR THE PUMP
17. BEARING WEAR INDICATOR
15.
 UNION

16.
 PACKING

7. UNION 14. CASE DRAIN LINE 8. PACKING FOR THE MOTOR
9.
 UNION

10.
 PACKING

13. TEE FITTING
11. PRESSURE LINE OF THE RIGHT SYSTEM
33. CHECK VALVE
12. RETURN LINE OF THE RIGHT SYSTEM
FWD
POWER TRANSFER UNIT C
Power Transfer Unit (PTU) Installation Figure 401 (Sheet 2)
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757 MAINTENANCE MANUAL
 S 874-038
 (5)  
Drain the fluid from the left reservoir into a container.

 S 864-039

 (6)  
Close the drain valve when all the fluid is drained from the reservoir.

 S 014-007

 (7)  
Remove these hydraulic lines to make the clearance for the removal of the PTU:

 (a)  Remove the hydraulic lines (27 and 29) from the flow limiter valve, on the forward bulkhead of the left wheel well.
 NOTE: If it is necessary to permit the removal of the
____ hydraulic lines (28 and 29), loosen the bolts which hold the flow limiter valve.
 (b)  Remove 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.
 S 034-006
 (8)  
Disconnect the hydraulic lines (11, 12, 14, 18, 23, and 24) from the PTU.

 S 034-008

 (9)
Install caps on the hydraulic lines (11, 12, 14, 18, 23, and 24).

 S 024-010

 (10)
 Hold the PTU (1) while you remove the bolts (2) and the washers (3).

 S 024-011

 (11)
 Remove the PTU (1) through the space supplied by the removal of the 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.
 TASK 29-22-01-404-012
 3. Install the Power Transfer Unit (PTU) (Fig. 401)
_____________________________________
 A. Consumable Materials
 (1)  D00054 Hydraulic System Lubricant - MCS 352
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757 MAINTENANCE MANUAL
　
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