24-25-04
ú ú 03 Page 401 ú Jan 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
LEFT WHEEL WELL SEE A A
HYDRAULIC LINE
UNION SUPPORT CLAMP ACCUMULATOR PRESSURE GAGE CHARGING VALVE HYDRAULIC MOTOR-DRIVEN GENERATOR
PRESSURE ACCUMULATOR SUPPORT CLAMP GAGE PLACARD SERVICING A FWD LEFT WHEEL WELL A
UNION
DUST CAP
PLACARD SERVICING CHARGINE LINE CHARGING VALVE
A-A
Hydraulic Motor-Driven Generator Accumulator Installation Figure 401
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24-25-04
ú ú 02 Page 402 ú May 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
SERVICE CENTER CENTRAL HYDRAULIC BSEE A
ASEE LEFT WHEEL WELL
LINE HYDRAULIC ACCUMULATOR GENERATOR HYDRAULIC MOTOR
UNION
CLAMP SUPPORT A FWD CHARGING LINE
ACCUMULATOR A LEFT WHEEL WELL
CLAMP SUPPORT GAGE PRESSURE CHARGING LINE
UNION DUST CAP
VALVE CHARGING
A-A LINE CHARGING CENTRAL HYDRAULIC SERVICE CENTER B
Figure 401A Hydraulic Motor Generator Accumulator Installation
A51185
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH 10 KVA SYSTEM ú
24-25-04
ú ú 03 Page 403 ú May 28/99
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A
757
MAINTENANCE MANUAL
S 864-012
(4) Remove the pressure from the HMG accumulator:
(a)
AIRPLANES WITH 10 KVA HMG; Open the access panel 197KL for the central hydraulic service center.
(b)
Remove the dust cap from the accumulator nitrogen charging valve.
(c)
Loosen the swivel nut at the charging valve, to bleed all the pressure from the accumulator (Ref 12-15-06).
E. Procedure
S 024-002
(1) Remove the HMG accumulator as follows:
(a)
Disconnect the charging line from the lower end of the accumulator. Discard the O-ring on the union.
(b)
Disconnect the hydraulic line from the upper end of the accumulator. Cap line and discard O-ring on union.
(c)
Loosen the nuts and open the accumulator support clamps.
(d)
Remove the HMG accumulator.
(e)
Remove the unions from the top and bottom of the accumulator. Keep for installation.
(f)
Plug the accumulator ports.
TASK 24-25-04-424-004
3. Install the HMG Accumulator (Fig. 401)
___________________________
A. Consumable Materials
(1)
Fluid, Hydraulic - BMS 3-11 (Ref 20-30-04)
(2)
Lubricant, Hydraulic System Fittings - MCS 352
(Ref 20-30-04)
B. References
(1)
12-15-06/301, Hydraulic Motor Generator Accumulator
(2)
20-30-04/201, Lubricants
C. Access
(1)
Location Zones
143 Main Landing Gear Wheel Well (LH Side)
(2)
Access Panels
732 Main Landing Body Door (LH Side)
D. Prepare for Installation
S 644-008
(1) Lubricate the new O-rings with hydraulic fluid or lubricant (Ref 20-30-04).
(a)
Install the O-rings on the unions.
(b)
Install the unions on the accumulator.
S 214-009
(2) Visually examine the HMG accumulator support clamps. Replace the clamps if they are cracked or broken.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH HYDRAULIC MOTOR GENERATOR ú
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