515 
32-44-0 Page 504  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  May 01/00 

PARKING BRAKE LINKAGE - REMOVAL/INSTALLATION
1.  Equipment and Materials
A.  Ground Lock Assembly (Ref 32-00-01)
B.  On airplanes with rigging pin hole on jackshaft, Rigging pin - 0.309/0.311 inch diameter by 6.8 inches long (one required)
NOTE:  The rigging pin is part of kit F70207-61.
2.  Remove Parking Brake Linkage
A.  Ensure ground lock assembly is installed in nose gear (Ref 32-00-01).
B.  Detach pushrod (7, Fig. 401) from lever (6) on lockshaft (3).
C.  Remove securing bolt and take lever off lockshaft.
D.  Remove bolts securing bearing housing (4) at inboard end of lockshaft.
E.  Tap lockshaft inboard until outboard end leaves bearing.
F.  Remove bearing and housing from inboard end of shaft and disconnect return spring (5) from structure.
G.  Take out shaft in an aft and outboard direction.
H.  Detach aft end of pushrod (7) from jackshaft (8). Remove pushrod.
I.  Detach pushrod (10) at lever on inboard end of jackshaft.
J.  Remove nut (9) on end of stud through jackshaft. Tap out stud and remove jackshaft.
K.  Remove stabilizer trim control wheel (15) from the left side of control stand.
L.  Remove both access panels (13) and (14) below thrust levers on left side of control stand.
M.  Detach pushrod at short lever on bellcrank (12) in control stand.
N.  Withdraw pushrod below cabin floor.
O.  Detach pushrod (1) at long lever on bellcrank.
P.  Remove bolt (11) through pivot of bell crank and take out bellcrank.
Q.  Detach and remove pushrod from parking brake lever (1).
NOTE:  Bearings for lockshaft and jackshaft can be changed when parking brake linkage is disassembled.
3. Install Parking Brake Linkage
A.  Manipulate lockshaft (3) into position. Line up with bearings and insert inboard end of shaft in bearing.
B.  Set lockshaft in position, fit outboard bearing and housing (4) over shaft. Insert bolts with red anticorrosive washers under heads and secure bearing housing.
C.  Reconnect return spring (5) to structure.
D.  Fit lever (6) on inboard end of lockshaft. Insert and tighten, securing bolt with red anticorrosive washers under head and nut.
E.  Place jackshaft (8) in position and tap in stud. Fit jackshaft nut (9) and secure jackshaft.
F.  Fit bellcrank (12) in lower portion of control stand with short lever up and long lever aft. Fit bolt and secure bellcrank.
G.  With captain's rudder pedals in neutral, install rudder pedal rig pin through pedal shafts.
520 
Jun 20/86  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  32-44-11 Page 401 

H.  Adjust the parking brake pawls.
(1)  
Remove the antirotation cotter pin in the two pawls.

(2)  
Loosen the two pawl locknuts on top of the pawls.

(3)  
Extend each pawl one at a time by unscrewing the pawl counterclockwise until the parking brake can no longer be set.

(4)  
Complete the adjustment by turning the pawls back clockwise 1 to 2 turns.

(5)  
Make sure that the parking brake can be set from the brake pedals of the pilot and the copilot.

(6)  
Install the antirotation cotter pins in the two pawls.

(7)  
Tighten the pawl locknuts.

I.  Set the bumper stops for the pawls.
(1)  
Add or remove washers to set the bumper stops.

(2)  
With the parking brake released, the pick-up bolt on the brake control bellcrank should clear the pawl by 0.16 to 0.20 inch when you operate the brake pedals (Detail C, Fig. 501, Sheet 2).

J.  Position jackshaft (8) for pushrod installation.
(1)  
On airplanes without jackshaft rigging pin, rotate jackshaft (8) until outboard forks are 13 +2 degrees from vertical (Fig. 401, Sheet 2, Detail C).

(2)  
On airplanes with jackshaft rigging pin, Rotate jackshaft until rigging pin can be installed through outboard forks and rigging pin hole in brake switch mounting bracket (Fig. 401, Sheet 3, Detail E). Install rigging pin.

K.  Install parking brake lever (2) so that stop surface of lever is against top of control stand.
L.  Install pushrods (1, 7, 10) and adjust as required.
NOTE:  When adjusting rod length, at least half of inspection hole must be covered by threaded rod end.
(1)  Attach pushrod (7) to lockshaft lever (6) using red anticorrosive washer under bolt head and under spacer below washer and nut.
　
中國(guó)航空網(wǎng) m.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：737 AMM 飛機(jī)維護(hù)手冊(cè) 起落架 LANDING GEAR(161)