(2)  
Lockwire - MS20995 NC32 (Mone1)

(3)  
Tail support jack

B.  Adjust Nose Gear Wheel Well Door Linkage (Fig. 501)
(1)  
Install ground lock assemblies (Ref 32-00-01) in nose and main landing gear.

(2)  
Jack airplane nose until nose wheel clears. Lower tail support jack as nose is raised (Ref Chapter 7, Jacking).

(3)  
Pressurize hydraulic system A (Ref Chapter 29).

(4)  
Remove lockwire from jamnut and rod end lock on each end of door operator rod.

(5)  
Loosen jamnut on each end of door operator rod.

NOTE:  Only loosen jamnut so operator rod can be turned for adjustment. Excessive loosening will disengage rod end lock from end of operator rod barrel.

(6)  
Remove gear ground lock assembly (Ref 32-00-01) from nose landing gear and retract nose landing gear. Refer to 32-33-0 for nose gear extension and retraction. Extend and retract nose landing gear as necessary while performing steps (7) and (8).

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.

(7)  
Apply 70 +10 pounds preload approximately 1.0 inch aft and 1.0 inch outboard of the forward inboard corner or 85 +10 pounds at the forward stop fitting on each door with nose landing gear retracted. Measure dimension below body contour at forward inboard corner on each door. If dimension is within 0.10 +0.02 inch, proceed to step (10).

(8)  
Remove weight, extend nose landing gear, and adjust each door operator rod in direction required to obtain 0.10 +0.02-inch dimension.

NOTE:  Door operator rod is adjustable as a turnbuckle.

(9)  
Repeat steps (7) and (8) as necessary to obtain required dimension.

(10)
Remove weight from door and extend nose landing gear.

(11)
Tighten jamnut on each door operator rod end.

(12)
Lockwire each jamnut and rod end lock.

510 
Jun 20/87  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  32-33-61 Page 501 

Nose Wheel Well Door Linkage Installation  500 
32-33-61  Figure 501  May 15/72 
Page 502 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

C.  Check door operation.
(1)  
Pressurize hydraulic system A (Ref Chapter 29).

(2)  
Extend and retract gear and check for proper operation of doors. Refer to 32-33-0 for nose gear extension and retraction.

(3) 
 Extend gear.

(4)  
Install ground lock assembly on nose gear (Ref 32-00-01).

(5)  
Remove jacks from airplane.

500 
May 15/80  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  32-33-61 Page 503 

NOSE GEAR DOOR LINKAGE-INSPECTION /CHECK
1.  General
A.  These data consist of illustrations and wear limit charts. No procedure is given in this section for access to permit inspection. Refer to Nose Gear Door Linkage - Removal/Installation.
2.  Nose Gear Door Linkage Wear Limits (Fig. 601)
A.  Indication of wear in the nose gear door linkage may be indicated by moving the lower edge of the wheel well door with the gear down and locked. By manually moving the bottom of the door inboard and outboard, a total movement of approximately 0.42 inch or greater indicates the need for a more detailed check of the linkage.
NOTE:  Application of force sufficient to cause deflection of the door will result in increased door movement and false indications.

500  Nose Gear Door Linkage Wear Limits 
Oct 20/83  Figure 601 (Sheet 1)  32-33-61 
Page 601 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

Nose Gear Door Linkage Wear Limits  500 
32-33-61  Figure 601 (Sheet 2)  Nov 15/72 
Page 602 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

MAIN GEAR MANUAL EXTENSION SYSTEM - DESCRIPTION AND OPERATION
1. General
A.  The main gear manual extension system is used to lower the main gear when hydraulic system pressure is not available. Pulling a manual extension handle for the respective gear transmits motion through drums and cables to unlock the gear from the up and locked position. When the main gear uplock mechanism is released, the gear will free-fall to the down and locked position.
B.  Controls for main gear manual extension are located in the floor of the control cabin immediately aft and to the right of the aisle stand (Fig. 1). Three controls, one for the nose gear and one for each main gear, are installed in the control cabin floor protected by an access door. The landing gear control handle must be either in neutral or down position to prevent hydraulic lock during manual extension. A single pull of approximately 60 pounds on the manual extension handle releases the main gear uplock mechanism to allow the gear to extend. A spring attached to the manual extension linkage returns the system to the original position. The landing gear position and warning lights function normally during manual extension operation.
　
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