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 Subtask 27-24-51-420-051 
R  B. Installation of the Rudder Servo Control 1025GM/2025GM/3025GM
 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.
 CAUTION : USE A SECOND WRENCH TO APPLY COUNTERTORQUE TO THE UNION WHEN_______ YOU DISCONNECT/CONNECT HYDRAULIC LINES ON UNIONS. IF YOU USE THE SECOND WRENCH, YOU WILL NOT LOOSEN OR TIGHTEN THE UNION TOO MUCH.
 CAUTION : YOU MUST INSTALL HYDRAULIC TUBES WITH HYDRAULIC FLUID AS_______ LUBRICANT. 
R R R R R  NOTE : If the three servo controls 1025GM, 2025GM, 3025GM are removed,____ you must install them in this sequence: - Lower servo control 1025GM - Green hydraulic system, - Center servo control 3025GM - Yellow hydraulic system, - Upper servo control 2025GM - Blue hydraulic system. The installation of the upper servo control 2025GM only is described. The installation of the center servo control 3025GM and the lower servo control 1025GM is almost the same. 
R R  (1) Install the bushes (34) and (36) in the bracket (52) of the vertical stabilizer (1).
 (2) Install the washer (58) and the locking plate (53) in the bracket (52) of the vertical stabilizer (1). 
R R  (3) Install the bushes (73) and (75) in the bracket (65) of the rudder (2).
R  (4) Install the washer (77) and the locking plate (64) in the bracket (65) of the rudder (2). 

 

R  (5) Put the clamp (10) on the servo control (5). 
R  (6) Put the servo control (5) in position at the brackets (52) and (65). 
R  (7) Make sure that the items that follow are correctly installed in the 
R  brackets (52) and (65): 
R  - The locking plates (53) and (64) 
R  - The washers (58) and (77) 
R  - The bushes (34), (36), (73) and (75). 
R
 (8) Connect the servo control (5) to the bracket (52) of the vertical
 stabilizer (1) as follows:
 (Ref. Fig. 403/TASK 27-24-51-991-003) 
R  NOTE : In this procedure it is necessary for two persons to install____ 
R  the items that follow in the bracket (52): 
R  - The servo control (5) 
R  - The sealing rings (35). 
R  (a) Apply a thin layer of the COMMON GREASE (Material No. 04-004) to 
R  the sealing rings (35). 
R  (b) Attach the sealing rings (35) in position at the eye-end bearing 
R  of the servo control (5). 
R  (c) Use the two GAGE - FEELER 0.25 mm (0.0098 in.) thick to carefully 
R  move the servo control (5) into the bracket (52). 
R  (d) Align the eye-end bearing of the servo control (5) and the 
R  sealing rings (35). Do this with the bolt hole in the bracket 
R  (52). 
R  (e) Install the bolt (55) through the connection of the bracket (52)
 and the servo control. 
R  (f) Connect the servo control (5) with the STA-LOK nuts (Ref. TASK
 20-22-00-400-001):
 1 Install the cupwasher (51) and the slotted nut (50) on the_
 bolt (55).
 2 Use the WRENCHES - NOTCHED, TIGHTENING OF NUTS NSA5454 (SL90-_
 374-7500) and TORQUE the slotted nut (50) to between 7.0 and
 8.0 m.daN (51.62 and 58.99 lbf.ft).

 

 3_ If the spring ring (48) was removed, install it on the tab washer (49). 
R R R  4_  Use the TOOL - INSTALLATION, TAB WASHERS STA-LOK NSA5454(SL90-313-7500) and install the tab washer (49) with the spring ring (48). Do this on the slotted nut (50).
 5_ Install the bolt (56) through the bolt (55).
 6_ Install the washer (47) and the nut (46) on the bolt (56).
 7_ TORQUE the nut (46) to 1.0 m.daN (88.49 lbf.in) and then loosen it to the next cotter pin hole.
 8_ Safety the nut (46) with a new cotter pin (45).
 (9) Connect the servo control (5) to the bracket (65) of the rudder (2) as follows: (Ref. Fig. 404/TASK 27-24-51-991-004) 
R R R R  NOTE : In this procedure it is necessary for two persons to install____ the items that follow in the bracket (65): - The servo control (5) - The sealing rings (74). 
R R  (a) Apply a thin layer of the COMMON GREASE (Material No. 04-004) to the sealing rings (74). 
R R  (b) Attach the sealing rings (74) in position at the eye-end bearing of the servo control (5). 
R R  (c) Use the two GAGE - FEELER 0.25 mm (0.0098 in.) thick to carefully move the servo control (5) into the bracket (65). 
　
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