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Figure 3-40 LOW PROFILE RECOVERY JACKS, STRU T-TYPE (C ontinued)
MODEL NUMBER [7] CAPACITY JACK DIMENSIONS, INCH (MM) MAX RAM ANGLE DEG [3] JACK WEIGHT LB (KG) [4] POWER CART WEIGHT LB (KG) [5]
Tons Metric Tons A [1] B [2] C D E F
8272 Standard Base 8272 Oversize Base 80 80 (72.6) (72.6) 37 (940) 37 (940) 91 (2311) 91 (2311) 12 (305) 12 (305) 140 (3556) 140 (3556) 24 (610) 44 (1118) 44 (1118) 52 (1321) 8.3 8.3 2,350 (1066) 2,500 (1134) 310 (141) 310 (141)
8294 Oversize Base[6] 100 (90.7) 37 (940) 91 (2311) 12 (305) 140 (3556) 44 (1118) 52 (1321) 8.3 2,700 (1225) 310 (141)
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AIRPLANE RECOVERY DOCUMENT
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Figure 3-43 THE INITIAL LIFT WITH AXLE JACK AND PNEUMATIC ELEVATORS AT THE FORWARD
AUXILIARY BODY JACK POINT
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AIRPLANE RECOVERY DOCUMENT
Figure 3-44 CONTOUR SHORING WHILE JACKING
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AIRPLANE RECOVERY DOCUMENT
Figure 3-45 B07003 LANDING GEAR JACKING BARS
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3-30-6 Important Data about the Surfaces Under the Jack
1.
When you use a jack, it must be on a hard, prepared surface with a sufficient strength. You must have this strength to permit the usual jack loads. If you have a surface with a strength that is not sufficient, you must prepare the area. You can install steel plates (1/2-inch or 13 mm thick) or layers of wood (plywood sheets, 3/4-inch thick or 19 mm) to make a surface for the jacks (See Figure 3-46).
Usual prepared surfaces for soft ground conditions are shown in Figure 2-8. If you have very soft ground, you must remove the material and put new material (crushed rock) into the area. This new material gives you a surface with a sufficient strength. Make sure that the surface below the jack is a level surface. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：757 Airplane Recovery Document 飞机恢复文件(82)
