____ bearing is removed.
 

 32-21-25
 ALL  ú ú 01 Page 211 ú May 28/00
 
A

757
MAINTENANCE MANUAL

 S 012-016
 (14)
 Remove the bolts (20), and the lockplate (21) (Fig. 201, Detail C).

 S 012-017

 (15)
 Use the wrench adapter for the gland nut to remove the gland nut (22).

 S 842-018

 (16)
 Move the gland nut (22) down the inner cylinder (8).

 S 432-019

 (17)
 Install the retainer (31) on the gland nut (22) (Fig. 202).

 CAUTION:_______ DO NOT LET THE EDGES OF THE GLAND NUT TOUCH THE INNER CYLINDER
 WHEN YOU MOVE THE GLAND NUT DOWN.  THE EDGES OF THE GLAND NUT
 CAN CAUSE SCRATCHES ON THE INNER CYLINDER WHICH CAN CAUSE
 DAMAGE TO THE SEALS.

 NOTE: The lower bearing pushes on the retainer when you install the
____ dynamic seal.
 S 432-020
 (18)
 Install the clamp assembly (34) on the steering nut (19).

 S 432-021

 (19)
 Tighten the nut on the clamp assembly (34).

 S 842-022

 (20)
 Carefully push the flange of each seal protector (33) between the outer cylinder (7) and the inner cylinder (8).

 S 432-023

 (21)
 Tighten the seal protector screws (35) to hold the seal protector (33) to the outer cylinder (7).

 32-21-25
 ALL  ú ú 01 Page 212 ú May 28/00
 
A

757
MAINTENANCE MANUAL

 S 492-024
 (22) Loosely install the puller assembly (27) around the inner cylinder (8).
 NOTE: Do not tighten the puller assembly.
____
 S 492-025
 (23)
 Tighten the three pins (28) into the lower bearing (24) with your hand.

 S 582-026

 (24)
 Lift the nose landing gear with an axle jack until the gland nut (22) is approximately 0.5 inch from the pins (28).

 S 492-027

 (25)
 Tighten the puller assembly (27).

 S 492-028

 (26)
 Install the strap (26) around the axle.

 S 862-029

 (27)
 Lower the axle jack.  The lower bearing (24) will move out of the recess between the inner cylinder (8), and the outer cylinder (7).

 NOTE: Pull the lower bearing (24) out only as far as necessary to
____
 remove the retainer pin (11).

 S 032-030
 (28) Remove the retainer pin (11).
 S 862-031
 WARNING: KEEP YOUR HANDS AWAY FROM THE TOP OF THE RETAINER BEARING
_______ AND THE LOWER BEARING. THE LOWER CENTERING CAM CAN MOVE DOWN QUICKLY AND CAN CAUSE INJURY TO PERSONS.
 (29) Lower the axle jack.  This divides the retainer bearing (10) from the lower bearing (24).
 

 32-21-25
 ALL  ú ú 01 Page 213 ú May 28/00
 
A

757 MAINTENANCE MANUAL
 S 492-032
 WARNING: INSTALL THE CAM LOCK ASSEMBLY BEFORE YOU DO WORK ON THE SEALS.
_______ THE LOWER CENTERING CAM CAN MOVE DOWN AND CAN CAUSE INJURY TO PERSONS.
 (30)
 Install the cam lock assembly (32).

 S 092-033

 (31)
 Remove the puller assembly (27) and the strap (26).

 F.
Replace the Active Static Seal (View C, Fig. 201).

 S 032-034
 (1)  Remove the two backup rings (15) from around the active static seal (14).
 NOTE: Install the backup rings with the new active static seal
____
 if the backup rings are serviceable.

 S 032-035
 CAUTION:_______BE CAREFUL NOT TO CAUSE DAMAGE TO THE INNER CYLINDER. DAMAGE ON THE SURFACE OF THE CYLINDER CAN CAUSE DAMAGE TO THE SEALS.
 (2)  
Use the plastic tool with the backup strip to cut the active static seal (14) from the outer groove of the cylinder.

 S 842-036

 (3)
Move the spare static seal (17) out of the spare seal groove.

 S 642-037

 (4)  
Apply a thin layer of hydraulic fluid and petrolatum to the spare static seal (17).

 S 432-038

 (5)  
Install the spare static seal (17) and the backup rings (15) in the top, outer groove.

 G.
Replace the Active Dynamic Seal (View C, Fig. 201).

 32-21-25
 ALL  ú ú 01 Page 214 ú May 28/00
 
A
757 MAINTENANCE MANUAL
 S 032-039
 CAUTION:_______BE CAREFUL NOT TO CAUSE DAMAGE TO THE INNER CYLINDER. DAMAGE ON THE SURFACE OF THE CYLINDER CAN CAUSE DAMAGE TO THE SEALS.
　
中國(guó)航空網(wǎng) m.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：757 AMM 飛機(jī)維護(hù)手冊(cè) 起落架 CHAPTER 32 - LANDING GEAR 2(17)