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A

757
MAINTENANCE MANUAL

PRESSURE SWITCH OF THE APU DC FUEL PUMP
SEE A
REAR SPAR
(DRY SIDE)

MOTOR IMPELLEROF THE APU DC FUEL PUMP
ELECTRICAL CONNECTOR
PRESSURE SWITCH
FWD
BOSS
PRESSURE SWITCH OF THE APU DC FUEL PUMP
A
APU DC Fuel Pump Pressure Switch Installation
Figure 401

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A
757 MAINTENANCE MANUAL
 S 494-010
 CAUTION: PUT A CONTAINER BELOW THE PRESSURE SWITCH TO CATCH ALL FUEL
_______ REMAINING IN THE APU DC FUEL PUMP. THE FUEL COULD CAUSE DAMAGE TO EQUIPMENT.
 (5)  
Put a container below the pressure switch to catch all fuel remaining in the APU DC fuel pump.

 S 024-003

 (6)  
Remove the pressure switch from the boss.

 S 094-011

 (7)  
Remove the container.

 TASK 28-25-03-404-004
 3. Install the Pressure Switch of the APU DC Fuel Pump (Fig. 401)
___________________________________________________
 A. References
 (1)  
AMM 32-00-15/201, Landing Gear Door Locks

 B.
Access

 (1)  
Location Zones
 133 Wing Center Section (Left)
 134 Wing Center Section (Right)

 C.
Procedure

 S 434-005
 (1)
Install a new O-ring on the threads of the pressure switch.

 S 424-012

 (2)
Install the pressure switch in the boss of the APU DC fuel pump.

 S 434-006

 (3)  
Connect the electrical connector to the pressure switch.

 S 864-007

 (4)  
Remove the DO-NOT-CLOSE tag and close this circuit breaker on the P11 panel:

 (a)  
11C33, FUEL DC PUMP PWR

 S 094-013
 WARNING: USE THE PROCEDURE IN AMM 32-00-15/201 TO REMOVE THE DOOR LOCKS.
_______ THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (5)  Remove the door locks from the landing gear doors and close the doors (AMM 32-00-15/201).
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