(4)
 Make sure that the isolation coupling of the PTU is disconnected (Ref. TASK 29-23-00-860-001).

 (5)
 Make sure that the applicable MLG actuating cylinder has been removed (Ref. TASK 32-31-46-000-001).

 (6)
 Make sure that the applicable MLG actuator attachment bearing assembly has been removed (Ref. TASK 57-26-13-000-004).

 Subtask 57-26-13-869-053
 C. Flight Configuration Precautions
 (1) If you did not open the LGCIU circuit breakers, make sure that the electrical circuits are de-energized (Ref. TASK 24-41-00-862-002).

 Subtask 57-26-13-865-051

 D. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU L/G/LGCIU/SYS1/NORM 1GA C09 121VU HYDRAULIC/LGCIU/SYS2 2GA Q35 121VU HYDRAULIC/LGCIU/SYS1/GRND SPLY 52GA Q34
 4. Procedure
_________
 (Ref. Fig. 403/TASK 57-26-13-991-004)
 Subtask 57-26-13-420-056
 A. Preparation for Installation
 WARNING : USE SOLVENTS/CLEANING AGENTS, SEALANTS AND OTHER SPECIAL
_______ MATERIALS ONLY WITH A GOOD SUPPLY OF AIR. OBEY THE MANUFACTURERS INSTRUCTIONS. PUT ON PROTECTIVE CLOTHING. DO NOT GET THEM IN YOUR MOUTH. DO NOT SMOKE. DO NOT BREATHE THE GAS. THESE MATERIALS ARE POISONOUS, FLAMMABLE AND SKIN IRRITANT. GET MEDICAL HELP IF YOUR SKIN OR EYES BECOME IRRITATED.
 (1)
 Clean the component interfaces and the adjacent areas with a MISCELLANEOUS (Material No. 19-003) made moist with CLEANING AGENTS (Material No. 11-004).

 (2)
 Use a MISCELLANEOUS (Material No. 19-003) made moist with CLEANING AGENTS (Material No. 11-004) to clean the bearing ball (2) and the bearing-halves (1).

 NOTE : Make sure that the grease channels are clean, and clear of
____
 unwanted material.

 (3)
 Do an inspection of the component interface and/or the adjacent area.

 (4)
 Make sure that the parts retained from the removed component are clean and in the correct condition.

 (5)
 Apply a thin layer COMMON GREASE (Material No. 04-004) to the areas that follow:

 -
the surface of the bearing ball (2)

 -
the grease channels on the external surface of the bearing ball (2)

 -
the grease channel on the internal surface of the bearing ball (2). NOTE : Make sure that all the grease channels are filled with grease.

____ Subtask 57-26-13-420-057
 B. Installation of the Bearing Seals
 (1)
 Install the new dowel pins (5) in one of the bearing-halves (1).

 (2)
 Install the new seal (3) in one of the bearing-halves (1).

 (3)
 Install the bearing-ball (2) in the applicable bearing-half (1). NOTE : Make sure that the metal support ring of the seal (3) is

____
 against the bearing ball (2).

 (4)
 Install the other new seal (4) in the applicable bearing-half (1). NOTE : Make sure that the metal support ring of the seal (4) is

____
 against the bearing ball (2).

 (5)
 Install the bearing-halves (1) together as follows:

 (a)
 Make sure that the seals (3) and (4) are correctly located in the seal grooves of the bearing-halves (1).

 (b)
 Make sure that the dowel pins (5) locate correctly in the holes of the applicable bearing-half (1).

 (c)
 Make sure that the distance between the bearing-halves (1) is closed equally.

 (6)
 Before installation of the bearing assembly, install the special nut (6). Make sure that the special nut (6) can be freely turned along the thread of the bearing assembly.

 (7)
 Remove the special nut (6).

 5. Close-up
________ Subtask 57-26-13-410-052
 A. Close Access
 (1)
 Make sure that the work area is clean and clear of tool(s) and other items.

 (2)
 Install the MLG actuator attachment bearing assembly (Ref. TASK 57-26-13-400-002).

 (3) Install the MLG actuating cylinder (Ref. TASK 32-31-46-400-001). Subtask 57-26-13-860-056
 B. Aircraft Maintenance Configuration
 (1) Connect the isolation coupling of the PTU (Ref. TASK 29-23-00-860-002).
 Subtask 57-26-13-865-052
 C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1GA, 2GA, 52GA.
 Subtask 57-26-13-582-051
 D. Lower the Aircraft
　
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