B. Sliding Tube
**ON A/C 001-003, 051-052,
(Ref. Fig. 001) R **ON A/C 004-049, 053-099, 101-149, 151-199, 201-299, 301-399, 401-499,
(Ref. Fig. 001A)
**ON A/C ALL
(Ref. Fig. 008) R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
(Ref. Fig. 009)
**ON A/C 301-399,
(Ref. Fig. 009A) R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
The sliding tube, which is ultra-high tensile-steel, moves in the main fitting and is a primary component of the shock absorber. The sliding tube has a chromed external face.
The axle and sliding tube are a one-piece item. The shock-absorber (main fitting) lower-bearing is put as low as possible to reduce the bending moments on the sliding tube. It also makes the structure lighter.
A lip in the sliding tube engages the head of a cylinder, to make a second stage chamber. The jacking dome is at the bottom of the cylinder.
1EFF : ALL 1 32-11-00Page 20 1 1 Aug 01/05 1 1 1CES 1
MLG Shock Absorber - Schematic Figure 008
1EFF : 1 1R 1CES ALL 1 11 1 32-11-00 Page 21 May 01/05
MLG Shock Absorber - Sectional View
Figure 009
R 1EFF : 001-049, 051-099, 101-149, 151-199, 1 32-11-00Page 22 1201-299, 401-499, 1Aug 01/05 1 1 1CES 1
MLG Shock Absorber - Sectional View
Figure 009A
R 1EFF : 301-399, 1 32-11-00 Page 23
1 1 May 01/05
1 1
1CES 1
**ON A/C 301-399,
The sliding tube, which is ultra-high tensile-steel, moves in the main fitting and is a primary component of the shock absorber. The sliding tube has a chromed external face.
The axle and sliding tube are a one-piece item. The shock-absorber (main fitting) lower-bearing is put as low as possible to reduce the bending moments on the sliding tube. It also makes the structure lighter.
The internal diameter of the barrel of the sliding tube is reduced to engage the lower diaphragm of the shock absorber. The diaphragm is kept in the sliding tube by a tube which screws into the jacking dome below the axle.
**ON A/C 001-003, 051-052,
The lower torque-link attachment-lugs are at the front of the sliding tube. The lower slave-link attachment lug is at the rear of the sliding tube.
The towing lugs are below the torque-link-lugs. The debogging lugs are on the rear face of the slave-link bracket. (It is not necessary to remove the components of the main leg to use the towing or debogging lugs).
The axle has sleeves, which give the axle protection. Brake mounting-flanges are machined as part of the axle, to hold each brake unit. The brake unit connects to the flange by nine dowels and three bolts. The positions of the dowels and bolts prevent incorrect assembly.
R **ON A/C 004-049, 053-099, 101-149, 151-199, 201-299, 301-399, 401-499,
The lower torque-link attachment-lugs are at the front of the sliding tube. The lower slave-link attachment lug is at the rear of the sliding tube.
The debogging lugs are on the rear face of the slave-link bracket. (It is not necessary to remove the components of the main leg to use the debogging lugs).
The axle has sleeves, which give the axle protection. Brake mounting-flanges are machined as part of the axle, to hold each brake unit. The brake unit connects to the flange by nine dowels and three bolts. The positions of the dowels and bolts prevent incorrect assembly.
1EFF : ALL 1 32-11-00Page 24 1 1 Aug 01/05 1 1 1CES 1 **ON A/C ALL
C. Shock Absorber
(Ref. Fig. 008)
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
(Ref. Fig. 009)
**ON A/C 301-399,
(Ref. Fig. 009A)
**ON A/C ALL
The shock absorber is a telescopic oleo-pneumatic unit which includes the sliding tube. It is in the main fitting to transmit the landing, take-off and taxiing loads to the wing.
When the shock absorber compresses, the load transmits to the hydraulic fluid and nitrogen gas. The recoil stroke is slow to make sure that the aircraft does not become airborne again.
The shock absorber is a two stage unit and contains four chambers:
-
a 1st stage gas chamber contains an LP gas pressure and some hydraulic fluid
-
a recoil chamber that contains hydraulic fluid
-
a compression chamber that contains hydraulic fluid
-
a 2nd stage gas chamber that contains a HP gas pressure.
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