(a)  
Disconnect and put a plug on the hydraulic lines.

 (b)  
Remove the bolts and washers that attach the package to the structure.

 (c)  
Remove the package from the airplane.

 NOTE: Write the spacer on the lower bolt.
____
 (d)  Remove the hydraulic unions from the package and discard O-ring packings. Plug ports.
 TASK 32-32-61-404-004
 2.  Install Main Gear Modular Package (Fig. 401)_________________________________
 A. Consumable Material
 (1)  
Hydraulic Fluid - BMS 3-11 (AMM 20-30-21)

 B.
Procedure

 S 424-005
 (1)
Install hydraulic unions in package with new O-ring packings.

 (a)  
Fill package with hydraulic fluid and cap ports.

 (b)  
Place modular package in position with two hydraulic fittings up.

 (c)  
Install a washer on each mounting bolt.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
SEE A
TRANSFER CYLINDER 
HYDRAULIC LINE (EXAMPLE) 
WASHER 
MOUNTING BOLT  BRACKET 
SPACER  INBD 
MODULAR PACKAGE  FWD 
A 
Main Landing Gear Modular Package Installation Figure 401 

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 (d) (e) (f) (g)  Insert bolts through package, add spacer to lower bolt, and screw bolts into bracket.Tighten bolts to standard torque.Remove caps and plugs.Connect hydraulic lines to package.
 (2)  S 864-006Jack airplane for retraction of main gear only (Ref Chapter 7, Jacking Airplane).
 S 864-011
 WARNING:_______ CLEAR ALL WHEEL WELL AREAS OF EQUIPMENT AND PERSONNEL BEFORE OPERATING GEAR.
 (3)  Remove ground lock assemblies and perform an operation test of main gear only (Ref 32-32-00, A/T). Cycle gear retraction several times to bleed air from package and lines.
 (4)  S 214-008Check package hydraulic connections for leaks.
 (5)  S 714-009Extend gear.
 (6)  S 844-010Lower airplane and remove jacks.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 MAIN LANDING GEAR TRANSFER CYLINDER - REMOVAL/INSTALLATION
__________________________________________________________
 1. General
________
 A. This procedure contains two tasks:
 (1)
The removal of the transfer cylinder from the main landing gear.

 (2)
The installation of the transfer cylinder of the main landing gear.

 TASK 32-32-71-004-001
 2. Main Landing Gear Transfer Cylinder Removal (Fig. 401)
___________________________________________
 A. References
 (1)
32-00-01/201, Ground Lock Assemblies

 (2)
29-15-00/201, Hydraulic System A and B

 B.
Procedure to Remove the Transfer Cylinder of the Main Landing Gear

 S 494-002
 (1)
Install the ground locks in all landing gear (Ref 32-00-01/201).

 S 864-003

 (2)
Remove the pressure from the hydraulic system A (Ref 29-15-00/201).

 S 034-004

 (3)
Disconnect the hydraulic lines attached to the cylinder.

 (a)
Put a cap on the hydraulic lines.

 S 034-005
 (4)
　
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