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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
SHAFT
SHAFT RETAINER
FLAP HYDRAULIC MOTOR
FWD  (3 LOCATIONS) MOUNTING BOLTS  UNIT POWER FLAP  DRIVE UNIT FLAP ALTERNATE CONNECTOR ELECTRICAL 
B 

Flap Power Unit Installation
Figure 401 (Sheet 2)

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A 737-300/400/500MAINTENANCE MANUAL
SEE A FWD
LEADING EDGE FLAP CONTROL VALVE
TRAILING EDGE 
FLAP CONTROL 
VALVE 
FWD 
SEE  B 
RIG PIN
F-1 
A  CAM 
FWD 
____NOTE:  THE FLAP CONTROL UNIT 
IS SHOWN WITH THE  INBD 
LOWER PAN REMOVED.
B 
Flap Control Unit Adjustment 
Figure 402 

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 B.
C.
D.
E.
A
737-300/400/500MAINTENANCE MANUAL
Consumable Materials
 (1)  
D00633 Grease - BMS 3-33 (Recommended)

 (2)  
D00013 Grease - MIL-G-23827 (Alternate)

 (3)
D00070 Hydraulic Fluid - MIL-H-5606References

 (1)  
12-12-00/301, Hydraulic Reservior

 (2)  
27-51-00/201, Trailing Edge Flap System

 (3)  
27-51-32/401, Inboard Flap Track Fairing

 (4)
27-51-54/501, Flap Power UnitAccess

 (1)  
Location Zone

 216, 217 Main Wheel WellProcedure
 S 034-016
 (1)  
Install the flap hydraulic motor and the flap alternate drive unit on the flap power unit (Fig. 401):

 (a)  
Apply a thin layer of the grease to the splines on the output shaft on the drive motors.

 (b)  
Attach the flap hydraulic motor to the flap power unit with the four mounting bolts.

 (c)  
Attach the flap alternate drive unit to the flap power unit with the three mounting bolts.

 S 424-017
 (2)  
Install the flap power unit (Fig. 401):

 (a)  
Put the flap power unit in its position on the support bracket.

 (b)  
Install the mounting bolts to attach the flap power unit.

 (c)  
Install the bonding jumper between the flap alternate drive unit and the mounting bracket.

 S 984-020
 (3)  
Turn the output shafts on the flap power unit until the marks on the shaft and shaft retainer align in the limit of 0.03 inch.

 S 434-021

 (4)  
Connect the hydraulic lines to the flap hydraulic drive motor:

 (a)  
Remove the plugs from the hydraulic lines and the ports.

 (b)  
Connect the hydraulic lines to the flap hydraulic motor.

 S 484-022
 (5)  Make sure the rig pin F-1 is installed in the flap control unit (Fig. 402).
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A 737-300/400/500MAINTENANCE MANUAL
 S 034-023
 (6)  
Connect the cables WFFA and WFFB to the flap power unit (Fig. 401):
　
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