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时间:2011-03-21 14:18来源:蓝天飞行翻译 作者:admin
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 4. Procedure
_________ (Ref. Fig. 401/TASK 27-54-52-991-001) Subtask 27-54-52-020-050
 A. Removal of the Pressure-Off Brake 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.
 NOTE : The removal procedure for the pressure-off brake at the valve
____ block 23CV is given. The removal procedure for the pressure-off brake at the valve block 24CV is almost the same. The differences in the procedures are given.
 (1)
 Remove the Pressure-Off Brake (POB) (41) together with the hydraulic motor (7) and the valve block assembly (23) from the differential gearbox.

 (a)
 Disconnect the hydraulic lines (11).

 (b)
 Remove the tie wrap (9) and disconnect the seal drain line (10).

 (c)
 Disconnect the case drain line (8).

 (d)
 Install the blanking caps on the open line ends (8),(10),(11).

 (e)
 Install the blanking plugs in the ports of the PCU (1).

 (f)
 Disconnect the electrical connector (22) from the valve block assembly (23).

 (g)
 Put blanking caps on the disconnected electrical connectors and receptacles.

 (h)
 Remove the bolts (3) and the washers (2).

 (i)
 Support the POB (41), the valve block assembly (23) and the hydraulic motor (7).

 (j)
 Remove the nuts (24) and the washers (25) from the studs (42).

 (k)
 Remove the POB (41) together with the hydraulic motor (7) and the valve block assembly (23).

 

 (2)
 Remove the POB (41) from the hydraulic motor (7) and the valve block assembly (23).

 (a)
 Remove the bolts (6) and the washers (5).

 (b)
 Carefully remove the hydraulic motor (7) from the POB (41) and from the transfer tubes (14) on the valve block assembly (23).

 (c)
 Remove and discard the O-ring (4).

 (d)
 Carefully remove the POB (41) from the transfer tube (33).

 

 (3)
 Remove and discard the O-rings (13),(35) and the back-up rings (12),(34) from the transfer tubes (14),(33).

 (4)
 Remove and discard the locking rings (21),(30) from the transfer tubes (14),(33).

 (5)
 Remove the transfer tubes (14),(33) from the valve block assembly (23).

 (6)
 Remove and discard the back-up rings (15),(31) and the O-rings (20),(32) from the transfer tubes (14),(33).

 


 Pressure-Off Brake Figure 401/TASK 27-54-52-991-001
 1EFF : 1 1R 1CES  ALL  1 11 1 27-54-52 Page 405 May 01/04

 

 1EFF : ALL 1 27-54-52Page 406 1 1 May 01/04R 1 1 1CES 1


 TASK 27-54-52-400-001
 Installation of the Pressure-Off Brake of the Flap Power Control Unit
 WARNING : MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING
_______
 GEAR.

 WARNING : OBEY THE HYDRAULIC SAFETY PROCEDURES.
_______
 WARNING : MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROL SURFACES ARE
_______
 CLEAR BEFORE YOU PRESSURIZE/DEPRESSURIZE A HYDRAULIC SYSTEM.

 WARNING : PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU
_______
 START A TASK ON OR NEAR:

 -
THE FLIGHT CONTROLS

 -
THE FLIGHT CONTROL SURFACES

 -
THE LANDING GEAR AND THE RELATED DOORS


 -COMPONENTS THAT MOVE.
 1. Reason for the Job
__________________
 Self Explanatory
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific container
 No specific tie wrap
 No specific warning notice
 No specific access platform 3.0 m (9 ft. 10 in.)

R No specific Torque Wrench : range 0.00 to 1.20 m.daN R (0.00 to 9.00 lbf.ft) No specific Torque Wrench : range 0.20 to 3.60 m.daN
 (2.00 to 26.00 lbf.ft) No specific Torque Wrench : range 1.00 to 10.00 m.daN
 (8.00 to 75.00 lbf.ft) 98D27504005000 1 PIN RIGGING-FLAPS (TRACK 1) 98D27504006000 1 PIN RIGGING FLAPS 98D27803000000 1 LOCKING TOOL - FLAP/SLAT CONTROL LEVER B. Consumable Materials


 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
 
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