(2)  
Access Panels
 541BB Main Tank
 641BB Main Tank

 C.  Procedure
 S 864-002
 (1)  
Remove the pressure from the applicable hydraulic system and the reservoir (AMM 29-11-00/201).

 S 864-003

 (2)  
Open these circuit breakers on the overhead panel, P11, and attach DO-NOT-CLOSE tags:

 (a)  
11K15, HYDRAULICS ELEC PUMP C1

 (b)  
11K16, HYDRAULICS ELEC PUMP RIGHT

 (c)  
11K24, HYDRAULICS ELEC PUMP C2

 (d)  
11K25, HYDRAULICS ELEC PUMP LEFT

 (3)
Remove the fuel from the main fuel tank (AMM 28-26-00/201).

 S 014-005

 (4)  
Remove the access door, 541BB or 641BB, for the main fuel tank (AMM 28-11-01/401).

 (5)  
Do this procedure: Purging and Fuel Tank Entry (AMM 28-11-00/201).

 S 034-007

 (6)  
Cut the inlet and the outlet hydraulic lines at the location shown on Figure 401.

 S 654-004
 S 654-006
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL

Heat Exchanger Installation
Figure 401 (Sheet 1)

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 ALL  ú ú 02 Page 402 ú Dec 20/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

HEAT EXCHANGER LUG

(INSTALL THE WASHER WITH THE COUNTERSINK AGAINST THE BOLT HEAD)
PHENOLIC WASHER
BONDING JUMPER
HEAT EXCHANGER ATTACHMENT

Heat Exchanger Installation
Figure 401 (Sheet 2)

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 ALL  ú ú 02 Page 403 ú Dec 20/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
 S 024-008
 (7)  
Remove the four bolts which hold the heat exchanger.

 S 024-009

 (8)  
Remove the heat exchanger.

 S 034-010

 (9)  
Install a cap on the hydraulic lines.

 S 114-011
 CAUTION:_______QUICKLY CLEAN THE FUEL TANK OF ALL HYDRAULIC FLUID. THE HYDRAULIC FLUID CAN CAUSE DAMAGE TO THE AIRPLANE EQUIPMENT.
 (10) Clean all hydraulic fluid from the fuel tank (AMM 12-25-01/301).
 TASK 29-11-26-404-012
 3.  Install the Heat Exchanger (Fig. 401)__________________________
 A. Equipment
 (1)  
Bonding meter - Model T477W, Avtron
 Manufacturing, Inc., Cleveland, Ohio

 B.
References

 (1)  
AMM 12-12-01/301, Hydraulic Systems

 (2)  
AMM 12-25-01/301, Exterior Cleaning

 (3)  
AMM 20-10-09/801, Flareless Tubing Assembly
　
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