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757 MAINTENANCE MANUAL
 E. Procedure
 S 424-010
 (1)  Install the HMG accumulator, as follows:
 (a)  
Put the HMG accumulator in a position so that the charging line and the hydraulic line align with the accumulator unions. Tighten the clamps.

 (b)  
Connect the charging line and the hydraulic line to the HMG accumulator.

 (c)  
Tighten the connections.

 S 614-011
 (2)  Service the HMG accumulator with nitrogen (Ref 12-15-06).
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757 MAINTENANCE MANUAL
 HMG TRANSFORMER RECTIFIER UNIT - REMOVAL/INSTALLATION
_____________________________________________________
 1.  General_______
 A.  This procedure has two tasks. The first task removes the hydraulic motor generator (HMG) transformer rectifier unit (TRU) from the airplane. The second task installs the HMG TRU on the airplane.
 TASK 24-25-05-014-013
 2.  Remove the HMG TRU__________________
 A.  References
 (1)  AMM 20-10-01/401, E/E Rack Mounted Components
 B.  Access
 (1)  
Location Zone
 119/120 Main equipment center

 (2)  
Access Panels
 119BL Main equipment center access

 C.  Prepare for Removal
 S 864-002
 (1) Open this circuit breaker on the main power distribution panel (referred to as the P6 panel) and attach DO-NOT-CLOSE tag:
 (a)  6C7, HYD GEN 28V DC PWR
 S 864-014
 (2)  Open this circuit breaker on the hydraulic generator power panel P71 and attach DO-NOT-CLOSE tag:
 (a)  71E1, HMG BAT CHGR
 D.  Remove the HMG TRU
 S 034-003
 (1)  
Do these steps to disconnect the TRU:

 (a)  
Remove the electrical connector from the TRU.

 (b)  
Remove the terminal cover from the TRU.

 (c)  
Identify the leads on the terminals for installation.

 (d)  
Remove the leads from the terminals.

 (2)  
Remove the TRU (AMM 20-10-01/401).

 S 024-004
 TASK 24-25-05-404-005
 3.  Install the HMG TRU___________________
 A.  References
 (1)  
AMM 20-10-01/401, E/E Rack Mounted Components

 (2)  
AMM 24-25-00/501, Hydraulic Motor Generator System

 B.  Access
 (1)  
Location Zones
 119/120 Main equipment center
 211/212 Flight compartment

 (2)  
Access Panels
 119BL Main equipment center access

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757
MAINTENANCE MANUAL

P6 PANEL
FLIGHT COMPARTMENT
FWD
MAIN EQUIPMENT 
CENTER ACCESS DOOR, 
HMG TRU,  119BL 
T10060 (E1-1) 

MAIN EQUIPMENT CENTER

Hydraulic Motor Generator Transformer Rectifier - Installation
Figure 401

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757 MAINTENANCE MANUAL
　
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