S 034-097
(5)
Disconnect the end fitting of the manual disengage cable from the drive-wheel actuator.
NOTE: If it is necessary, connect the end fitting to the dummy
____
fitting on the support structure below the floor.
S 034-098
(6) Disconnect the electrical connector plug for the drive-wheel actuator from the electrical receptacle on the support structure (WDM 25-57-51).
NOTE: If it is necessary, attach the connector plug to the dummy
____ receptacle on the PDU housing. Remove the dust cap from the dummy receptacle on the support structure and install it to the electrical receptacle.
S 434-099
(7) Install a cover for the PDU wheel well in the floor if it is necessary.
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747-400 MAINTENANCE MANUAL
TASK 25-57-01-404-079
3. Power Drive Units Installation (Fig. 401)______________________________
A. References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 25-57-00/501, Main Deck Cargo Handling System
(3)
AMM 25-57-04/401, Caster and Roller Trays
(4)
AMM 25-58-01/401, Lock/Stop Roller and Caster Trays
B. Access
(1) Location Zones
200 Main Deck
C. Install the Tray Mounted PDUs
S 424-172
(1)
Connect the electrical connector to the PDU.
S 424-173
(2)
Place the PDU to the correct position on the Tray Lock Assy.
S 424-174
(3)
Install the two shoulder screws to fix the PDU to the Tray Lock Assy.
S 424-175
(4)
If removed, install the transport roller located after electrical connector of the PDU.
S 864-177
(5)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a) P128, Main Deck Cargo Handling Power Panel 1) PDU 7R & 8R STEERING 7R 2) PDU 9R & 10R 3) PDU 11R & 12R 4) MAIN DECK CARGO HANDLING CONTROL
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747-400 MAINTENANCE MANUAL
(b)
P129, Main Deck Cargo Handling Power Panel
1) PDU 13R & 14R
2) PDU 15R & 16R
(c)
P130, Main Deck Cargo Handling Power Panel
1) PDU 20R & 21R
2) PDU 22R & 23R STEERING 23R
(d)
P133, Main Deck Cargo Handling Power Panel
1) PDU 7L & 8L STEERING 7L
2) PDU 9L & 10L
3) PDU 11L & 12L
4) MAIN DECK CARGO HANDLING CONTROL
(e)
P134, Main Deck Cargo Handling Power Panel
1) PDU 13L & 14L
2) PDU 15L & 16L
(f)
P135, Main Deck Cargo Handling Power Panel
1) PDU 20L & 21L
2) PDU 22L & 23L
3) MAIN DECK CARGO HANDLING CONTROL
D. Install the Nonsteerable PDU
S 844-101
(1)
Prepare to install the PDU:
(a)
Inflate the drive-wheel tire to a pressure of 125-130 psig.
(b)
Make sure the drive-wheel tire is 2.87-2.93 inches above the top surface of the PDU support plate. 1) Adjust the height of the drive-wheel tire if it is
necessary (AMM 25-57-00/501).
(c)
Remove the cover from the PDU wheel well in the floor (if it is installed).
(d)
Remove the unwanted materials from the support fitting and the PDU wheel well.
(2)
Put the PDU adjacent to the support fitting.
S 864-102
NOTE: The drive-wheel actuator must be on the outboard side of the
____
PDU.
