(d)  
Move the ALT FLAPS control switch to the UP position.
 1) Make sure the flaps retract.

 (e)  
Put the ALT FLAPS control switch in the OFF position.

 (f)  
Put the ALT FLAPS arm switch in the OFF position.

 (g)  
Put the flap control lever in the UP detent.

 (9)  
Release the pressure in hydraulic system B (Ref 27-51-00/201).

 S 865-010
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737-300/400/500MAINTENANCE MANUAL
 S 865-011
 (10)
 Remove the electrical power (Ref 24-22-00/201).

 S 415-012

 (11)
 Install the inboard flap track fairings (Ref 27-51-32/401).

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737-300/400/500MAINTENANCE MANUAL
 FLAP HYDRAULIC MOTOR - REMOVAL/INSTALLATION
___________________________________________
 1.  General_______
 A.  There are two tasks in this procedure. There is a task for the removal and a task for the installation of the flap hydraulic motor.
 TASK 27-51-57-004-001
 2.  Flap Hydraulic Motor Removal (Fig. 401)____________________________
 A.  References
 (1)  
27-51-00/201, Trailing Edge Flap System

 B.  
Access

 (1)  
Location Zone
 216, 217 Main Wheel Well

 C.  
Procedure

 S 864-002
 (1)  
Make sure the pressure is released from the hydraulic reservoir B (Ref 27-51-00/201).

 S 024-005

 (2)  
Disconnect the hydraulic lines from the hydraulic motor:

 (a)  
Put a container below the hydraulic motor to catch the hydraulic fluid.

 (b)  
Disconnect the hydraulic lines from the hydraulic motor.

 (c)  
Install the plugs in the hydraulic lines and the ports.

 S 024-011
 (3)  
Remove the flap hydraulic motor:

 (a)  
Remove the mounting bolts that attach the flap hydraulic motor to the flap power unit.

 (b)  
Remove the flap hydraulic motor.

 (c)  
Install a cover on the flap power unit.

 TASK 27-51-57-404-003
 3.  Flap Hydraulic Motor Installation (Fig. 401)_________________________________
 A.  Consumable Materials
 (1)  D00633 Grease - BMS 3-33 (Recommended)
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A

737-300/400/500
MAINTENANCE MANUAL

SEE A
FLAP 
HYDRAULIC 
MOTOR 
SHAFT 
SHAFT 
RETAINER 

FLAP POWERFWD UNIT
CHECK
VALVE

MOUNTING BOLTS (4 LOCATIONS)
A

Flap Hydraulic Motor Installation
Figure 401

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 B.
C.
D.
A
737-300/400/500MAINTENANCE MANUAL
　
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