EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
20-10-09
ALL ú ú 01 Page 403 ú Sep 20/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
~................................................................ | Flareless Tubing Assembly Thread Compounds | | Table 401 | .................................................................. | TYPE OF SYSTEM | APPROVED THREAD COMPOUNDS | | | (STRAIGHT THREAD FITTINGS) | .................................................................. | Compressed | Antiseize Compound BMS 3-28 | | Gas | | ........................ | | Deicing or | | | (Anti-icing) | | .................................................................. | Instrument | Antiseize Compound BMS 3-28 | | Air | | .................................................................. | Pneumatic | Antiseize Compound BMS 3-28. | ........................ D00062 Pneumatic Grease MIL-G-4343 | | Air Conditioning | | .................................................................. | Fire | Antiseize Compound BMS 3-28 | | Protection | or | ........................ D00053 Grease MIL-G-6032 | | Coolant | | .................................................................. | Water | Antiseize Compound BMS 3-28 | | Injection | | .................................................................. | Fuel | D00070 Hydraulic Fluid MIL-H-5606 | ........................ | | Lubrication | | .................................................................. | Hydraulic | D00070 Hydraulic Fluid MIL-H-5606 | | MIL-H-5606 | | .................................................................. | Hydraulic | D00054 Skydrol Assy Lube MCS 352 | | BMS 3-11 | | ..................................................................
| Hydraulic | D00070 Hydraulic Fluid MIL-H-5606 |
| MIL-H-6083 | or |
| | D00106 Hydraulic Fluid MIL-H-6083 |
.................................................................. | Misc | Antiseize Compound BMS 3-28 | | Tubing | or | | | D00053 Grease MIL-G-6032 | 2......................….........................................1
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
20-10-09
ALL ú ú 01 Page 404 ú Sep 20/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
B. Procedure
S 214-007
(1)
Examine the tube ends and fittings for any defects or contamination that can have bad effect on the seal of the installation.
S 214-037
(2)
Look for worn areas or dents on the tube.
S 644-008
(3)
Lubricate the sleeve and fittings.
S 394-009
(4)
Apply the thread compound that is applicable to your system (Table 401) (Fig. 401). Apply the thread compound immediately before installation. Apply the thread compound to the external threads, shoulder, and conical seal surface of the flareless sleeve.
NOTE: Do not get the thread compound on the internal surfaces of
____ the tube or the inner surface of the bore of the fitting. Do not apply a thread compound when you assemble Dri-Lubed B-nuts.
S 424-010
(5)
Put the tubing assembly in the airplane and keep the tube clamps loose to permit you to align the tube in the fitting.
S 214-044
(6)
Look at the tags to make sure the tubes are aligned with the correct fittings.
S 824-011
(7)
Align the tube and fitting with your hand and make the tube end touch the bottom of the fitting.
S 434-012
(8)
Keep the tube end at the bottom and aligned in the fitting. Turn the B-nut with your hand until the B-nut touches the bottom of the sleeve shoulder.
S 434-038
(9)
To tighten the assembly, hold the union with a wrench and torque tighten the B-nut to the recommended value (Fig. 403).
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