(a)
Two spare static seals (1)
(b)
Two spare dynamic seals (2)
(c)
One active static seal (3)
(d)
One active dynamic seal (4)
S 432-072
(29)
Install the metering pin in the top of the inner cylinder.
S 582-050
(30)
Lower the airplane so the lower bearing on the inner cylinder is still outside the outer cylinder.
S 092-051
(31)
Remove the strap from the puller assembly and the fork of the inner cylinder.
S 012-010
(32)
Remove the puller pins from the lower bearing.
G.
Replace the Active and the Spare Seals
(1)
Fill the grooves for the spare seals with MIL-G-4343 grease.
S 642-012
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(2) S 842-013Move the spare seals (3 and 4) down the inner cylinder. (a) Put the spare seals in the correct grooves in the lower bearing.
(3) S 012-014Remove the pins to disconnect the seal retainer from the lower bearing.
(4) S 492-085Install the lock assembly to hold the spacer and seal retainer inside the outer cylinder.
(5) S 842-238Move the lower bearing up and then down to show the dynamic seal (1).
(6) S 842-016Move the backup rings away from the dynamic seal (1).
(7) S 842-017Move the backup rings out of the groove for the static seal (2).
(8) S 212-018Examine the backup rings. (a) Replace the backup rings if it is necessary.
S 032-052
CAUTION:_______BE CAREFUL NOT TO CAUSE DAMAGE TO THE INNER CYLINDER. DAMAGE OF THE SURFACE OF THE INNER CYLINDER CAN CAUSE DAMAGE TO THE SEALS.
(9)
Cut the static (2) and the dynamic (1) seals. Use a plastic tool and backup strip to prevent damage to the surface of inner cylinder and the lower bearing groove.
S 012-019
(10)
Remove the seals from the inner cylinder.
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S 642-020
(11)
Apply a thin layer of hydraulic fluid and petrolatum to the new static seal and backup rings (2).
S 842-021
(12)
Move the static seal (2) down the inner cylinder and in the outer groove in the lower bearing.
S 842-022
(13)
Move the backup rings in the correct position, adjacent to the seal.
S 642-023
(14)
Apply a thin layer of hydraulic fluid and petrolatum to the new dynamic seal and backup rings (1).
S 842-024
(15)
Move the dynamic seal (1) on top of the lower bearing.
S 862-025
(16)
Put the seal and backup rings (1) in position for the installation.
NOTE: Do not extend the seals more than necessary for the
____
installation.
S 432-026
(17)
Install the ram assembly on the inner cylinder between the dynamic seal and the seal retainer.
S 842-027
(18)
Move the ram assembly down to push the dynamic seal (1) in position in the lower bearing.
(19)
Remove the ram assembly.
S 032-028
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S 092-086
(20)
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本文链接地址：757 AMM 飞机维护手册 起落架 CHAPTER 32 - LANDING GEAR 1(135)
