S 034-012

 (13)
 If you must replace the hydraulic pump (1), remove the fittings from the ports of the hydraulic pump:

 (a)  
Remove the reducer (13) and the O-ring (14) from the supply port.

 (b)  
Remove the union (11) and the O-ring (12) from the pressure port.

 (c)  
Remove the union (9) and the O-ring (10) from the case drain port.

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747-400 MAINTENANCE MANUAL
 (d) Discard the O-rings (10, 12, and 14).
 S 034-013
 (14) Install caps on the open ports of the hydraulic pump (1) to keep out contamination.
 TASK 29-21-01-404-014
 3. Auxiliary AC Motor-Driven Hydraulic Pump Installation (Fig. 401)
_____________________________________________________
 A. Consumable Materials
 (1)
D00153 Fluid - Hydraulic, Fire Resistant BMS 3-11

 B.
Parts

 ~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 401 | 1 | Auxiliary Hydraulic Pump *[1] | | | | | | 4 | Bolt(4) | | | | | | 5 | Washer(4) | | | | | | 9 | Union | | | | | | 10 | O-ring | | | | | | 11 | Union | | | | | | 12 | O-ring | | | | | | 13 | Reducer | | | | | | 14 | O-ring | | | | 2......…........…...................................…..........….....….........1
 *[1]TO BE FURNISHED
 C. References
 (1)
AMM 12-12-01/301, Hydraulic Systems

 (2)
AMM 20-22-01/601, Electrical Bonding

 (3)
AMM 24-22-00/201, Manual Control

 (4)
AMM 54-62-00/201, Nacelle Strut Access Panels

 D.
Access

 (1)  
Location Zone
 454 Strut Aft Fairing
 484 Strut Aft Fairing

 (2)  
Access Panel
 454A Trailing Edge Fairing Doors - System 1
 484A Trailing Edge Fairing Doors - System 4

 E.
Procedure

 (1)
Lubricate the fittings and the O-rings with hydraulic fluid.

 (2)
Remove the caps from the ports of the hydraulic pump (1).

 S 644-015
 S 434-016
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 (3)  S 434-046Install the O-rings (10, 12, and 14) on the applicable unions (9 and and 11) and reducer (13).
 (4)  S 434-017Install the union (9) in the case drain port of the hydraulic pump (1).
 (5)  S 434-018Install the union (11) in the pressure port of the hydraulic pump (1).
 (6)  S 434-019Install the reducer (13) in the supply port of the hydraulic pump (1)
 (7)  S 424-047Put the hydraulic pump (1) in its position on the bracket.
 (8)  S 434-048Make sure you connect the bonding jumper to the lower left bolt (4).
 (9)  S 424-020Install the four bolts (4) and the four washers (5).
 S 764-021

 (10)
 Make sure the resistance between the bonding jumper (3) and the bracket is less than 0.001 ohms (AMM 20-22-01/601).

 S 434-033

 (11)
 Do these steps to connect the hydraulic hoses to the hydraulic pump (1):

 (a)  
Remove the covers from the openings in the hydraulic hoses.

 (b)  
Connect the case drain hose (8) to the union (9) in the case drain port.

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