G. Remove nuts (7) and washers from spring retainer bolts. Remove springs (1) and (5).
H. Remove lock strut, consisting of lock brace (3) and lock link (6) as a complete assembly.
4. Install Nose Gear Lock Mechanism
CAUTION: THE LOCK LINK-LOCK BRACE ASSEMBLY (LOCK STRUT) CONSISTS OF A MATCHED PAIR, ADJUSTED TO GIVE THE CORRECT AMOUNT OF OVERCENTER LOCKING. IF EITHER PART IS REPLACED, THE COMPLETE ASSEMBLY MUST BE SET UP ON A SURFACE TABLE AND READJUSTED.
A. Clean all components, and lubricate all except shaft (19, figure 401) and bolt (14) with grease, just before assembly.
B. Install lock link assembly (3 and 6).
(1)
Apply a thin coat of corrosion preventive compound to lock brace shaft (19).
(2)
Position lock brace (3) in fitting (20). Install shims as used in original installation and insert shaft (19).
NOTE: If the lock strut or either of its components have been replaced, it will be necessary to check the gap between the lock brace and fitting (20), with both ends of lock strut attached. A clearance of 0.000 to 0.005 inch between lock brace and fitting must be maintained, if necessary, by shimming.
(3)
Insert bolt (17) through lock brace (3) and shaft (19).
(4)
Add washer and nut and tighten nut to standard torque.
C. Raise lock strut to give access to lock actuator upper attachment bolt (18).
D. Align rod end of lock actuator (16) with fork in lock brace (3).
E. Install a countersunk washer on the upper attachment bolt (18) with countersink toward bolt head.
F. Position nylon washer on each side of rod end between rod end and lock brace fork and insert bolt (18) from left side of airplane.
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32-33-51 Page 402 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Nov 15/68
G. Add washer and nut. Tighten nut 290 to 410 pound-inches torque. Lock nut with cotter pin.
NOTE: If necessary, interchange nuts and/or add washer under bolthead, between lock brace and countersunk washer, to index cotter pin within torque limits.
H. Connect lock link (6) to drag brace.
(1)
Install spacer bushings (11) and (12) in each arm of lock link (6).
(2)
Place washer (15) on pin (9) with washer flat mating in recess in drag brace upper link (8).
(3)
Apply a thin coat of corrosion preventive compound to bolt (14) and insert with bolthead to right of airplane, through spacer bushings, washer (15), and drag brace pin (9).
(4)
Add washer and nut.
(5)
Tighten nut 300 to 400 pound-inches torque. Lock nut with cotter pin.
I. Connect bottom end of actuator to fitting (20) (Ref 32-33-21).
J. Deleted
K. Position springs (1) and (5) on spring retainer bolts. Add washers and nuts.
L. Tighten nuts finger-tight and lock with cotter pins.
M. Stretch springs (1) and (5) and slide connections over each end of lock spring shaft (19).
N. Add washers and nuts. Tighten nuts finger-tight and lock with cotter pins.
O. Install hose guard on lock brace as far aft as possible without riding on radius.
P. Check operation of nose gear (Ref 32-33-0 A/T).
Q. Lower airplane and remove jacks.
500
Oct 20/86 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 32-33-51 Page 403
Nose Gear Lock Mechanism Installation 500
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