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747-400 MAINTENANCE MANUAL
2) Do not use the hose if two or more wires in one plait are broken, or if several wires are broken in a concentrated area.
S 434-008
CAUTION:_______PUT CAPS ON THE HOSES AND FITTINGS. UNWANTED MATERIAL CAN CAUSE CONTAMINATION OF HOSES, DAMAGE TO SYSTEM COMPONENTS, AND LEAKAGE OF HYDRAULIC FLUID.
REMOVE ALL HYDRAULIC FLUID LEAKAGE. HYDRAULIC FLUID CAN CAUSE CORROSION OR OTHER DAMAGE.
(2) Use caps on the hose assemblies and mating connections.
NOTE: Caps keep out moisture and unwanted material until the hose
____ is again connected to its system.
S 214-003
(3)
Make sure all fittings are clean and free of defects.
S 644-004
(4)
Lubricate external threads as necessary (AMM 20-11-05/401).
S 424-005
(5)
Put the hose in position and tighten the fitting by hand.
S 214-010
(6)
Examine the installation for correct alignment and length.
S 434-006
CAUTION: USE THE INDEX LINE ON THE SIDE OF THE HOSE TO MAKE SURE
_______ THE HOSE IS NOT TWISTED. IF THE HOSE IS TWISTED, HOSE FAILURE OR HOSE COUPLING LEAKAGE CAN OCCUR BEFORE THE USUAL TIME.
(7) Tighten the pipe fitting ends (AMM 20-51-01/201).
(8) S 434-001Tighten the coupling-type ends (AMM 20-51-01/201). to prevent twisted flexible tubing. Use two wrenches
(9) S 434-007Clamp hose as necessary.
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MAINTENANCE MANUAL
INCORRECT CORRECT
Flexible Hose Installation
Figure 401
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O-RINGS - REMOVAL/INSTALLATION
______________________________
1. General_______
A. This procedure contains one task. The task is the installation of O-rings over sharp edges. Sharp edges include threaded fasteners, keyways, slots, splines, and ports.
B. Before installation, examine the O-rings for cuts, abrasions, deformities, and surface defects.
TASK 20-11-19-404-010
2. Installation of O-rings (Fig. 401)_______________________
A. Equipment
(1) O-Ring Installation Tool - ST848
B. Consumable Material
(1) Fluid used with component or system
C. Procedure
S 804-002
(1) Use the applicable ST848 series O-Ring installation tools.
~..........................................
| | TUBE OR HOSE |
| TOOL NO. | FITTING SIZE |
............................................
| ST848-187 | 1/16 |
| -250 | 1/4 |
| -312 | 5/16 |
| -375 | 3/8 |
| -500 | 1/2 |
| -625 | 5/8 |
| -750 | 3/4 |
| -1000 | 1 |
| -1250 | 1-1/4 |
| -1500 | 1-1/2 |
| -1750 | 1-3/4 |
2...............…..........................1
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