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A
747-400 MAINTENANCE MANUAL
(b) On the P715 Aux/Ext No. 2 Power Center 1) SIDE CARGO DOOR PWR
S 864-056
(2)
Move the insulation blanket that is necessary for access (Ref 25-21-04/401).
S 864-005
(3)
Manually turn the lift power unit until the clearance between the actuator arm and the downstop is 0.20 +/-0.01 inch (Detail D).
S 034-006
(4)
Do these steps if it is necessary to remove the torque tube from the rotary actuator (Detail B):
(a)
Remove the screws that hold the coupling to the input shaft of the rotary actuator.
(b)
Disengage the coupling from the shaft on the rotary actuator.
(c)
Remove the torque tube.
S 034-007
(5)
Remove the bolts that attach the rotary actuator to the bearing housing.
S 024-008
(6)
Pull the rotary actuator away from the bearing housing until the input and output shafts are clear (Section A-A).
TASK 52-32-03-404-009
3. Install the Rotary Actuator (Fig. 401)___________________________
A. Consumable Materials
(1)
D00013 Grease - MIL-G-23827
B.
References
(1)
24-22-00/201, Manual Control
(2)
25-21-04/401, Sidewall and Ceiling Insulation
(3)
52-32-00/001, Side Cargo Door
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A
747-400
MAINTENANCE MANUAL
(4)
IPC 52-32-02 Fig 1
(5)
SSM 52-32-01
(6)
WDM 52-32-11, 52-32-12
C.
Access
(1)
Location Zone
261 Main Deck STA 1720 To STA 2040
(2)
Access Panels
836L Door - Main Deck Cargo
D.
Procedure
S 864-067
(1)
Supply electrical power (Ref 24-22-00/201).
S 644-010
(2)
Put a thin layer of grease on the splines of these parts:
(a)
The quill shafts
(b)
The rotary actuators
(c)
The torque tubes (if it is necessary).
S 424-057
WARNING: DO NOT PUT ROTARY ACTUATORS WITH DIFFERENT PART NUMBERS
_______ TOGETHER ON THE SAME DOOR. IF YOU PUT ROTARY ACTUATORS WITH DIFFERENT PART NUMBERS ON THE SAME DOOR, THE DOOR CAN CLOSE ACCIDENTLY. THIS CAN CAUSE INJURY TO PERSONNEL AND DAMAGE TO EQUIPMENT.
(3)
Put the quill shaft on the input shaft of the first rotary actuator as shown in View A-A.
(4)
Install the first rotary actuator on the bearing housing.
S 424-012
NOTE: To remove backlash in the actuators, hold the output shaft
____ and turn the input shaft in the open direction.
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A
747-400 MAINTENANCE MANUAL
S 864-071
(5)
Make sure that the splines of the actuator shafts engage with the splines of the quill shaft and the actuator arm.
S 424-072
(6)
Push the actuator into the bearing housing.
S 864-014
(7)
Align the bolt holes in the rotary actuator and the bearing housing.
S 424-015
(8)
Install eight bolts with washers under each bolt head and nut.
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