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757 MAINTENANCE MANUAL
 NO. 1, 2, AND 4 PASSENGER DOOR
______________________________ EMERGENCY POWER RESERVOIR - SERVICING (GASEOUS)
_______________________________________________
 1.  General
_______
 A.  This procedure gives the instructions to pressurize the emergency power reservoir for the No. 1, 2, or 4 passenger door. It is necessary to pressurize a reservoir after a passenger door is opened with emergency power, or when the reservoir pressure gage shows less than 2500 psi at 70°F.
 NOTE: A pressure indication that is in the green band on the pressure
____ gage is not always satisfactory. Refer to the chart on Fig. 301 for the correct pressures for different temperatures.
 B.  Before you do the servicing on the emergency power reservoir, make sure the reservoir agrees with the hydrostatic test specifications of the vendor component maintenance manual.
 NOTE: Reservoirs must have a hydrostatic test every three years.
____ The latest test date is on a label at the top of the cylinder.
 TASK 12-15-10-603-001
 2.  Servicing - Emergency Power Reservoir (Fig. 301)
_____________________________________
 A.  Equipment
 (1)  Safety Pin Set - Passenger Door Emergency Power
 Reservoir, B52009-1

 NOTE: The safety pin set is a set of two pins
____ connected by a lanyard. If the safety pin set is not available, you can use two bolts (3/16-inch diameter by 1 1/4-inch grip) as an alternative. Install one bolt above and one bolt below the reservoir plunger. Attach tags to the bolts to identify the bolts for removal.
 B.  Consumable Materials
 (1)  
Clean, dry nitrogen

 (2)  
B00074 Solvent - Spec. P.-D.-680, Dry Cleaning

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757
MAINTENANCE MANUAL

22. COTTER PIN 
1. NUT 
21. PLUNGER  2. WASHER 
20. KNIFE ASSEMBLY 
19. O-RING 
18. DIAPHRAGM
17. EAR 
3. BOLT 
16. PLUG  4. TRIGGER LEVER ASSEMBLY 
15. GASKET  5. REDUCER 
14. RUPTURE DISK  6. PRESSURE GAGE 
13. RETAINER 
7. BODY 
12. SEAT  8. O-RING 
11. BACK-UP RING 
10. O-RING 
9. PRESSURE VESSEL 

EMERGENCY POWER RESERVOIR

Passenger Door Emergency Power Reservoir Servicing
Figure 301 (Sheet 1)

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MAINTENANCE MANUAL

 C. References
 (1) 52-11-30/401, Emergency Power Reservoir
 D. Access
 (1)  Location Zones
 831 No. 1 Passenger Door (Left)
 832 No. 2 Passenger Door (Left)
 836 No. 4 Passenger Door (Left)
 841 No. 1 Passenger Door (Right)
 842 No. 2 Passenger Door (Right)
 846 No. 4 Passenger Door (Right)

 E. Procedure
 S 493-002
 (1) Install the safety pins on the emergency power reservoir.

PERMITTED RESERVOIR

DO THE SERVICING FOR THE RESERVOIR PRESSURE RANGE WHEN THE PRESSURE GETS TO THIS LINE
Passenger Door Emergency Power Reservoir Servicing Figure 301 (Sheet 2)
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757
MAINTENANCE MANUAL

 (2)  S 023-003Remove the emergency power reservoir (Ref 52-11-30).
　
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