(4)  
Put the hose in position and tighten fittings hand tight.

 S 214-005

 (5)  
Make sure the installation is correctly aligned and is the correct length.

 S 434-006
 CAUTION: USE THE INDEX LINE ON THE SIDE OF THE HOSE TO FIND IF THE HOSE
_______ IS TWISTED. IF THE HOSE IS TWISTED, HOSE FAILURE OR HOSE COUPLING LEAKAGE COULD OCCUR BEFORE THE USUAL TIME.
 (6)  Tighten the pipe fitting ends. correct torque values. Refer to AMM 20-11-00/201 for the
 (7)  S 434-007Tighten the coupling type ends to prevent twists in the hose. (AMM 20-11-00/201).  Use two wrenches
 S 424-008

 CAUTION: MAKE SURE THERE IS SUFFICIENT CLEARANCE BETWEEN THE FLEXIBLE
_______ HOSE AND THE ADJACENT STRUCTURE AFTER YOU TIGHTEN THE CLAMPS. IF CLEARANCE IS NOT SUFFICIENT, THE HOSE COULD TOUCH THE ADJACENT STRUCTURE. THIS CAN CAUSE HOSE WEAR OR HOSE FAILURE BEFORE THE USUAL TIME.
 (8)  Clamp the hose as necessary.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 20-10-10
 ALL  ú ú 01 Page 404 ú Jan 28/02
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757 MAINTENANCE MANUAL
 FLUID LINE TUBING CLAMPS - REMOVAL/INSTALLATION
_______________________________________________
 1.  General_______
 A.  This procedure contains one task. The task is the replacement of block clamps.
 B.  Block clamps are used to hold fluid lines at a specified location.
 C.  Loop-type cushioned tube clamps are used in the fluid line installations to prevent vibration and wear of lines.
 (1)  Before you install a nylon loop clamp, make it larger to approximately 1-1/2 times the tube diameter. Do this three or four times to do a test for flexibility. If the clamp feels flexible and does not crack, you can install it.
 D.  For removal/installation procedures of vee-band clamps, refer to
 (AMM 70-12-02/201).

 TASK 20-10-11-964-001
 2.  Replacement of Block Clamps___________________________
 A.  Consumable Materials
 (1)  G00145 Tape - Permacel P421
 B.  Remove the Block Clamp
 S 034-002
 (1)  
Remove the nuts, bolts and washers that hold the block clamp assemblies together.

 S 024-003

 (2)  
Remove the block clamp assemblies.

 C.  Install the Block Clamp
 S 034-010
 (1)  Remove and discard the used tape from the tube.
 NOTE: The condition of used tape on the tube does not always occur.
____
 S 214-004
 (2)  At the location of the block clamps and tube overlap, apply three layers of P421 tape to the tube.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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 ALL  ú ú 01 Page 401 ú May 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

 (3)  S 434-011Apply the tape |.25 inch from each edge of the block.
 (4)  S 434-005Put the tubes in the applicable notches in one-half of the block assembly.
 (5)  S 424-006Put the other half of the block assembly in position.
 (6)  S 434-007Put the channel on the half of the block assembly that the bolt head will touch.
 (7)  S 434-008Put the washers on the bolts and put the bolts through the holes in the block clamp assembly.
 (8)  S 434-009Put the washer and nut on the threaded end of the bolt and tighten the nut.
 NOTE:____ Make sure the washers are under the bolt head and the nut to prevent wear caused by the bolt head to the block clamp channel.

 TASK 20-10-11-404-013
 3. Protective Lacing - Installation
 A. Consumables
 (1)  
A00027 Adhesive - RTV 108 (used on nose landing gear only)

 (2)  
G00057 Tape - Scotch, 3M #63, (used on nose landing gear only)

 (3)  
G02503 Lace - Black Nylon Untreated Sleaving (1/8 inch)

 B. Procedure - Install the Protective Lacing
 S 404-014
 (1)  Install the lacing per Figure 401, steps 1 through 3, except nose landing gear.
　
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