E

HYDRAULIC MOTOR GENERATOR TEST SWITCH
TEST
HYD GEN
MISCELLANEOUS TEST PANEL F
HYDRAULIC CASE PORT
HYDRAULIC PRESSURE PORT
HYDRAULIC
MOTOR
WIRING
HARNESS
HYDRAULIC SEAL DRAIN PORT HYDRAULIC RETURN PORT
HYDRAULIC SERVO VALVE
ELECTRICAL CONNECTOR
GENERATOR
HYDRAULIC MOTOR GENERATOR
D

PTU SWITCH
GEN FIELD MANUAL RESET PTU
ON
FIELD

FIELD
FIELD
OFF W

OFF W
OFF W OFF
L R APU
FLT CONTROL SHUTOFF

ON ON ON
OFF OFF OFF
a
a
a
GENERATOR FIELD AND HYDRAULIC CONTROL PANEL, M10191 (P61)
G
Hydraulic Motor Generator System - Component Location
Figure 501A (Sheet 2)

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 24-25-00
 ú ú 01 Page 506 ú May 28/99
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A51165
A

757
MAINTENANCE MANUAL

HYDRAULIC MOTOR GENERATOR POWER PANEL, P71
SEE H
HYDRAULIC MOTOR GENERATOR CONTROL UNIT
SEE I
CONTROL UNIT  HYDRAULIC MOTOR GENERATOR POWER PANEL, P71 
H 
(4 LOCATIONS) MOUNTING BOLTS  ELECTRICAL CONNECTOR 

HYDRAULIC MOTOR GENERATOR CONTROL UNIT
I
Hydraulic Motor Generator System - Component Location Figure 501A (Sheet 3)
K21948
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 24-25-00
 ú ú 04 Page 507 ú May 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

 TASK 24-25-00-725-011
 3. System Test - Hydraulic Motor Generator System (Fig. 501)
______________________________________________
 A. General
 (1)  The system test does these checks:
 (a)  
HMG Reset Signal (for 5 kva HMG only)

 (b)  
Hydraulic Shutoff Valve

 (c)  
Bus Power Transfer

 (d)  
Thrust Reverser EROPS Transfer Relay.

 B. References
 (1)  
AMM 24-22-00/201, Electrical Power - Control

 (2)  
AMM 27-61-00/201, Activate/Deactivate Spoilers

 (3)  
AMM 29-11-00/201, Main Hydraulic Systems

 (4)  
AMM 32-09-02/201, Air Ground Relays

 (5)  
AMM 32-00-15/201, Main Gear Door Locks

 C. Equipment
 (1)  
MULTIMETER - 0-1000v dc |1%, 0-750 ac, 0-2
 amps, 0-2 meg-ohms

 (2)  
5kva HMG Test Box - A24008-27 (Preferred)
 5kva HMG Test Box - A24008-19 (Optional)

 NOTE: This test box is only for use on 5kva HMG units.
 D. Access
 (1)  
Location Zones
 143/144 Main Landing Gear Body
 211/212 Flight Compartment

 (2)  
Access Panels
 732/742 Main Landing Gear Body Doors

 E. Prepare for the Test
 S 865-012
 (1)  
Supply electrical power (AMM 24-22-00).

 S 865-013

 (2)  
Make sure the EICAS circuit breakers on P11 are closed.

 S 015-014
 WARNING: USE THE PROCEDURE IN AMM 32-00-15/201 TO INSTALL THE DOOR
_______ LOCKS. THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (3)  Open the doors for the left landing gear and install the door locks (AMM 32-00-15).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH HYDRAULIC MOTOR GENERATOR ú

 24-25-00
 ú ú 04 Page 508 ú Sep 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
　
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