F. Procedure (Fig. 401)
 S 144-021
 (1)  
Clean the surfaces for an electrical bond at the location of each bonding jumper (AMM 20-10-22/701).

 S 434-022

 (2)  
Remove the caps from the hydraulic lines and the ports of the hydraulic pump (28).

 S 644-023

 (3)  
Apply hydraulic lubricant or hydraulic fluid to the packings (5, 9, 12) and to the threads of the union (4) and the reducers (8, 11).

 S 434-024

 (4)  
Install the union (4), the reducers (8, 11) and the packings (5, 9, 12) in the ports of the hydraulic pump (28).

 S 034-025

 (5)  
ON AIRPLANES WITH VICKERS PUMPS;
 do these steps:

 (a)  Look at the plug which is in the seep port of the hydraulic pump (28) to identify the type of the plug. There are two types of plugs; a solid plug or a plug with vents.
 NOTE: The solid plug, P/N 73866, does not have vent holes.
____ You can identify the plug with vents by the two holes in the flat surfaces of the hexagonal area.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

 CAUTION: YOU MUST REMOVE THE SOLID PLUG, P/N 73866, FROM THE SEEP
_______ PORT OF THE PUMP. IF YOU DO NOT REMOVE THIS PLUG, THE PUMP CAN BECOME TOO HOT.
 (b)  If a solid plug, P/N 73866, is in the seep port of the hydraulic pump (28), remove the plug and the O-ring from the hydraulic pump (28).
 NOTE: If the plug has vent holes, you must not remove it
____
 from the hydraulic pump (28).

 S 434-054
 (6)  If necessary, install the vibration isolators (18) on the mounting plate (21).
 NOTE: All four vibration isolators must be the same part number.
____
 S 434-028
 (7)  
Install the washers (23) and the bolts (22) to attach the vibration isolators (18) to the mounting plate (21).

 S 434-055

 (8)  
Install hydraulic pump (28) on the vibration isolators (18).

 S 614-029

 (9)  
Fill the hydraulic pump (28) with hydraulic fluid.

 S 434-030

 (10)
 Install the supply hose (6) on the hydraulic pump (28).

 S 424-031

 (11)
 Put the hydraulic pump (28) in its position.

 NOTE:____The weight of the hydraulic pump (28) is 45 pounds. Make sure you hold the hydraulic pump (28) sufficiently while you install the fasteners.
　
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