737 AMM 飞机维护手册 起落架 LANDING GEAR(105)

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F.  Add washer and nut. Tighten nut 300 to 400 pound-inches torque.
NOTE:  If necessary, interchange nuts and/or add washer under bolt head, between lock brace and countersunk washer, to index cotter pin hole within torque limits.
G.  Lock nut with cotter pin.
H.  Swing lock brace (9) down. Align lock brace with bracket (3) and insert shaft (2).
NOTE:  If lock strut or either of lock strut components have been replaced, it will be necessary to check gap between lock brace and bracket (3), with both ends of lock strut attached. A clearance of 0.000 to 0.005 inch between lock brace and bracket must be maintained, if necessary, by shimming.
I.  Rotate shaft (2) and adjust axially to align holes for retainer bolt (10) in shaft and lock brace.
J.  Coat retainer bolt (10) with corrosion preventive compound and insert from top.
K.  Add washer and nut, tighten nut.
L.  Connect lock springs (1) to ends of shaft (2).
M.  Add washer and nut to each end. Tighten nuts finger-tight and lock with cotter pins.
N.  Insert lower end of actuator in bracket (3) with nylon washers (5) installed as in step E.
O.  Install lower attachment bolt (4) from left side of airplane with countersunk washer under head as in step C.
P.  Add washer and nut. Tighten nut 300 to 400 pound-inches torque.
NOTE: If necessary, interchange nuts and/or add washer under bolt head between bracket
(3) and countersunk washer, to index cotter pin hole within torque limits.
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500  Nose Gear Lock Actuator Installation 
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Q.  Lock nut with cotter pin.
R.  Remove caps and plugs and connect hydraulic lines to actuator.
6.  Bleed Nose Gear Lock Actuator (Airplane On Jacks)
A.  Pressurize hydraulic system A (Ref 29-11-0 MP).
B.  Jack airplane for nose gear retraction (Ref Chapter 7, Airplane Jacking).
WARNING: CLEAR PERSONNEL AND EQUIPMENT FROM NOSE GEAR PATH.
C.  Remove nose gear ground lock assembly (Ref 32-00-01).
WARNING:  CHECK THAT GROUND LOCK ASSEMBLIES ARE INSTALLED IN MAIN LANDING GEAR TO PREVENT INADVERTENT OPERATION OF GEAR. INJURY TO PERSONNEL AND/OR EQUIPMENT COULD RESULT IF GEAR RETRACTS.
D.  Cycle gear through several extension and retractions to bleed air from actuator and lines and check for proper gear operation.
E.  Check hydraulic connections for leaks.
F.  Extend nose gear and install ground lock assembly (Ref 32-00-01).
G.  Lower airplane and remove jacks.
H.  Check hydraulic reservoirs for proper servicing and service if required.
7.  Bleed Nose Gear Lock Actuator (Airplane On Ground)
A.  General
(1)  If jacking the airplane is not possible, the following procedure may be used as an alternate.
B.  Procedure
(1)  
Make sure a functional test has been performed on the actuator.

(2)  
Make sure the landing gear ground lock assemblies are installed in the nose and main landing gear (Ref 32-00-01).

WARNING:  MAKE SURE GROUND LOCK ASSEMBLIES ARE INSTALLED IN ALL LANDING GEAR TO PREVENT INADVERTENT OPERATION OF THE GEAR. INJURY TO PERSONNEL AND/OR DAMAGE TO EQUIPMENT COULD RESULT IF GEAR RETRACTS.

(3)  
Make sure the hoses are correctly routed and are not twisted.

(4)  
Connect a variable volume test bench to the airplane and pressurize hydraulic system A to 3000 psi.

(5)  
Using the manual override, move the landing gear selector handle from DOWN to UP several times. When you move the landing gear selector handle, leave the handle in each position at least three seconds before you move it to the next position.

(6)  
Move the landing gear selector handle to DOWN.

(7)  
Make sure the rod end of the lock actuator tries to retract when you move the landing gear lever from DOWN to the OFF position.

(8)  
Move landing gear selector handle to DOWN.

(9)  
Check the hydraulic connections for leaks.

(10)
Add hydraulic fluid to the reservoir as necessary (Ref Chapter 12, Hydraulic Servicing).

(11)
Restore airplane to normal.

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500 
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