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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
TACHOMETER GENERATOR - REMOVAL/INSTALLATION
___________________________________________
 1.  General
_______
 A.  This procedure contains the removal and the installation tasks for the tachometer generator.
 B.  The tachometer generator is on the forward end of the APU, above the oil filter. You can get access to the generator through the APU cowl door.
 TASK 49-61-61-004-001
 2.  Tachometer Generator Removal (Fig. 401)
____________________________
 A.  References
 (1)  IPC 49-60-01 Fig. 1
 B.  Access
 (1)  
Location Zones
 101 Flight Compartment, LH
 205 Electronic Compartment
 703 APU Compartment

 (2)  
Access Panels
 1201 Electronic Equipment Access Door
 3804 APU Cowl Door

 

 C.  Procedure
 S 864-002
 (1)  Set the switch and the circuit breaker:
 (a)  
Set the APU master switch, on the P5 forward overhead panel, to the OFF position and attach a DO-NOT-OPERATE tag.

 (b)  
Open this circuit breaker and attach a DO-NOT-CLOSE tag: 1) E3-3 Electrical Shelf, APU Control Unit

 S 014-003
 (2)  Open the APU cowl door:
 (a)  
Open the latches for the APU cowl door.

 (b)  
Open the APU cowl door.

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 49-61-61
 ALL  ú ú 01 Page 401 ú Nov 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES /MAINTENANCE MANUAL ////////////////////////
SEE B
SEE A
FWD SWITCH TEMPERATURE OIL  A SWITCH FOR THE SEQUENCING OIL PRESSURE  SWITCH FOR THE LOW OIL PRESSURE  GASKET OIL PUMP  TACHOMETER GENERATOR NUT WASHER (4 LOCATIONS) 
ELECTRICAL CONNECTOR 
OIL FILTER 
B 
Figure 401 Tachometer Generator Installation 

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 49-61-61
 ALL  ú ú 01 Page 402 ú Nov 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(c)  Connect the door support rods.
 S 014-004
 CAUTION:_______BE CAREFUL WHEN YOU MOVE THE LOWER SHROUD. DAMAGE TO THE SHROUD DRAIN LINES CAN OCCUR.
 (3)  Remove the lower shroud:
 (a)  
Hold the lower shroud and open the shroud latches.

 (b)  
Remove the lower shroud.

 S 024-005
 (4)  Remove the tachometer generator:
 (a)  
Disconnect the electrical connector from the tachometer generator.

 (b)  
Remove the nuts and the washers that attach the tachometer generator to the APU.

 (c)  
Carefully remove the tachometer generator in a straight line.

 (d)  
Remove the gasket from the tachometer generator. 1) Discard the gasket.

 TASK 49-61-61-404-006
 3.  Tachometer Generator Installation (Fig. 401)_________________________________
 A. Consumable Materials
 (1)  D00013 Grease - MIL-G-23827
 B. References
 (1)  
AMM 49-11-00/201, APU Power Plant

 (2)  
IPC 49-60-01 Fig. 1

 C. Access
 (1)  
Location Zones
 101 Flight Compartment, LH
 205 Electronic Compartment
 703 APU Compartment

 (2)  
Access Panels
 1201 Electronic Equipment Access Door
 3804 APU Cowl Door

 

 D. Procedure
 S 424-007
 (1)  Install the tachometer generator:
 (a)  Install the new gasket on the mounting pad.
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