29-21-01
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

21. SCREW 24. CASE TUBE CONNECTION(2 LOCATIONS) DRAIN
TO THE RAT STRUT TUBE
HOUSING (EXAMPLE)18. TURBINE HUB
22. SPEED SENSOR COVER SEE A FOR SHIMED TUBES,
23. SCREW SEE B FOR FLEXIBLE
(2 LOCATIONS) OUTLET TUBE
25.
 OUTLET TUBE

26.
 INLET TUBE

HYDRAULIC TUBE (EXAMPLE)
27. TUBE NUT
36. SCREW  (EXAMPLE)
34. SPEED
28. END FLANGE SENSOR
(EXAMPLE)
29. SHIM
16. RAT STRUT (EXAMPLE)
HOUSING
35. SPEED SENSOR GEAR 31. O-RING
32.
 BOLTS  (EXAMPLE) 30. BACKUP

33.
 WASHERS  RINGS (4 LOCATIONS) (EXAMPLE)

HYDRAULIC TUBE CONNECTION
TUBE TO THE HYDRAULIC
MEASURE THE PUMP (EXAMPLE)
(EXAMPLE)  17. HYDRAULIC

CLEARANCE  PUMP 
27. TUBE NUT  BETWEEN THE  SEE  A  FOR SHIMED TUBES, 
(EXAMPLE)  TUBE NUT AND 
THE HOUSING.  SEE  B  FOR FLEXIBLE 
17. HYDRAULIC  OUTLET TUBE 
PUMP 
HOUSING  FLEXIBLE 
OR  OUTLET 
16. RAT STRUT  27. TUBE NUT  TUBE 
HOUSING 

17. HYDRAULIC PUMP HOUSING OR
28. TUBE END FLANGE (THE 16. RAT STRUT
TUBE NUT MUST TOUCH HOUSING
THE TUBE END FLANGE WHEN YOU MEASURE THE 30. BACKUP CLEARANCE)
RINGS O-RING
SHIMED TUBE CONNECTION
28. TUBE END
(EXAMPLE)
FLANGE A1
FLEXIBLE OUTLET TUBE CONNECTION (EXAMPLE)
1
THE 0-RINGS, BACKUP RINGS, AND SHIMS ARE NOT SHOWN
B 2
2
AIRPLANES WITH SB 29A46
Hydraulic Pump and Turbine Hub Installation Figure 402
E85541
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 29-21-01
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
 S 034-011
 CAUTION: DO NOT HOLD THE RAT BY ITS TURBINE BLADES OR PUT THE RAT DOWN
_______ ON ITS TURBINE BLADES. THE WEIGHT OF THE RAT CAN CAUSE DAMAGE TO THE TURBINE BLADES OR THE GOVERNOR MECHANISM.
 (6)  Hold the RAT while you remove the mounting bolts.
 NOTE: The RAT weighs approximately 70 pounds.
____
 S 034-012
 (7)  
Remove the nut (2), washers (3), bolt (1) and bushings (4) at the outboard pivot point.

 S 034-013

 (8)  
Remove the nut (7), washer (8) and bolt (6) at the inboard pivot point.

 S 024-014

 (9)  
Remove the RAT from the support frame.

 H. Remove the Hydraulic Pump (Fig. 402)
 S 034-074
 (1)  Loosen the tube nuts (27) at the top of the three hydraulic tubes (24, 25, 26) until the tube nuts (27) disengage from the RAT strut housing (16).
 NOTE: On airplanes with a flexible outlet tube (25) there will
____ be no shims on the flexible outlet tube (25).
 S 934-068
 (2)  
Make a mark on the top of the three hydraulic tubes (24, 25, 26) with a felt-tip marker to make the installation easier.

 S 034-016

 (3)  
Loosen the tube nuts (27) at the bottom of the three hydraulic tubes (24, 25, 26).

 NOTE: Do not remove the three hydraulic tubes (24, 25 ,26) from
　
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