NOTE: Make sure the main gear damper piston shaft has no
____ primer or corrosion inhibiting compound on it.
 (b)  
Put the damper bracket (2) in its position on the damper assembly (13), and the upper torsion link (1).

 (c)  
Install the damper bracket bolt that holds the damper
 bracket (2) to the damper assembly (13).

 (d)  
Install the damper attachment bolts (3) that hold the damper assembly (13), and the damper bracket (2) to the upper torsion link (1).

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A 737-300/400/500MAINTENANCE MANUAL
 (e)  Tighten the damper attachment bolts (3) to 180-220 inch-pounds.
 CAUTION: DO NOT PERMIT THE LOCKWIRE TO GO BETWEEN THE TORSION LINK
_______ AND THE APEX THRUST WASHER. DAMAGE TO THE PARTS CAN OCCUR.
 (f)  Lockwire the damper attachment bolts (3), and the damper bracket bolt.
 S 424-028
 (8)  
Put the thrust washer (10) on the damper shaft with the concave side of the thrust washer against the torsion link.

 S 214-029

 (9)  
Make sure that the key in the washer engages the slot in the shaft.

 S 214-030

 (10)
 Make sure that the washer is correctly installed against the torsion link.

 S 424-031

 (11)
 Install the apex nut (8) on the damper shaft with the hexagon side to the thrust washer.

 S 214-032

 (12)
 Do a check on the projection of the damper piston head.

 S 824-033

 (13)
 If the projection is not in the limits, turn the lower torsion link to show the correct dimension.

 S 424-034

 (14)
 Put the lockwasher (7) on the damper shaft.

 S 214-035

 (15)
 Make sure that the key in the washer engages the slot in the shaft.

 S 434-036

 (16)
 Tighten the apex nut (8) 400 to 500 pound-inches.

 (17)
 Loosen the apex nut (8) to zero torque.

 S 434-038

 (18)
 Again tighten the apex nut (8) to 50-150 pound-inches until the hole in the apex nut aligns with a hole in the lock washer.

 S 424-039

 (19)
 Install the lockbolt (9), the washer, and the nut in the apex nut (8) and the lockwasher (7).

 S 434-037
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A
737-300/400/500MAINTENANCE MANUAL
 S 424-040
 (20)
 Install the checknut (6) and tighten the checknut 50 to 100 pound-inches.

 S 434-043

 (21)
 Attach the checknut (6) to the lockbolt (9) with lockwire.

 S 434-044

 (22)
 Remove the plug and the cap and connect the hydraulic return line (14) to the damper assembly (13).

 S 844-045

 (23)
 Pressurize the hydraulic system A and do a check on the hydraulic connection to the damper for leaks (AMM 29-15-00/201).

 S 494-000

 (24)
 Open the bleeder plugs (16), (17), and (19) one at a time.

 CAUTION:_______ PROTECT TIRES, GEAR STRUCTURE, AND SURROUNDING AREA FROM
 ACCIDENTAL HYDRAULIC FLUID SPILLAGE.  HYDRAULIC FLUID CAN CAUSE
 DAMAGE TO EQUIPMENT.

 S 494-055
 WARNING: MAKE SURE THAT THE GROUND LOCKPINS ARE INSTALLED IN ALL THE
_______ LANDING GEAR TO PREVENT THE ACCIDENTAL OPERATION OF THE GEAR. INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT COULD OCCUR IF THE GEAR RETRACTS.
 (25) Operate the control lever of the landing gear from DN to UP then DN to charge the damper compensator.
 NOTE: This will make fluid available to bleed the damper.
____
 S 874-057
 (26) Let the fluid flows to remove air bubbles from the damper assembly (13).
 NOTE: If it is necessary, operate the control lever many times
____ during bleeding of the damper assembly (13) to make sure the damper has enough fluid.
　
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