MAJOR DIAMETER PITCH DIAMETER MINOR DIAMETER 2.0531 INCHES MAJOR DIAMETER FOR SOME AIRPLANES 2.0179 INCHES PITCH DIAMETER FOR SOME AIRPLANES REWORK THE AXLE PER THE OHM ORIGINAL CONFIGURATION UNDERSIZED CONFIGURATION NUT FOR UNDERSIZED AXLE 2.0625-16 UNS 3B THREAD 2.0000-16 UNS 3B THREAD
Nose Landing Gear Axle Wear Limits
Figure 601 (Sheet 2)
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32-21-71
ALL ú ú 01 Page 604 ú Jul 15/93
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A
737-300/400/500MAINTENANCE MANUAL
NOSE GEAR DOORS- DESCRIPTION AND OPERATION
__________________________________________
1. General_______
A. The nose gear doors are clamshell type and consist of two doors that fair with the fuselage contour when closed (Fig. 1). The doors close over the nose wheel well in the lower nose section of the fuselage when the gear is retracted and open when the gear is extended. The doors remain open at all times when the nose gear is in the down position. Refer to 32-33-00 for information on nose gear door retraction.
2. Nose Wheel Well Doors_____________________
A. The nose wheel well doors are of glass and graphite fabric reinforced epoxy laminate faced honeycomb construction. Three hinge arms extend to the side of each door to engage hinges at the outer edge of the wheel well. The lower end of a door actuation rod is connected to a raised lug on the middle hinge of each door. A link and crank assembly connected to an arm protruding from the nose landing gear trunnion work with the door actuation rods to open and close the doors for extension and retraction.
UPPER DRAG BRACE LINK
AFT DOOR
HINGE
DOOR ACTUATION
ROD (ADJUSTABLE)
HINGE
BRACKET
FORWARD NOSE GEAR
DOOR HINGE
MIDDLE
DOOR HINGE
NOSE WHEEL
WELL DOORS
STEERING
CYLINDER
Nose Wheel Well Doors
Figure 1
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32-22-00
ALL ú ú 01 Page 1 ú Oct 25/84
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
NOSE GEAR WHEEL WELL DOORS - REMOVAL/INSTALLATION
_________________________________________________
TASK 32-22-11-004-031
1. Wheel Well Doors Removal (Fig. 401)________________________
A. Equipment
(1)
Ground Lock Assemblies (AMM 32-00-01)
(2)
Tail Support Jack
B.
Procedure
S 864-030
(1)
Make sure you install the ground lock assemblies in the nose and the main landing gear (AMM 32-00-01).
S 864-043
(2)
Lift the airplane nose until the nose wheels are clear of ground.
(a)
Lower the tail support jack while you lift the nose (Refer to Chapter 7, Jacking).
S 024-032
(3)
Remove the bolt (5) to remove the door operator rod (1) from the door center hinge (4).
S 024-049
(4)
Remove bonding jumper (25) from forward and aft door hinges (13).
S 024-044
(5)
Hold the door and remove the bolts (6, 18) from the forward, the center, and the aft hinges.
S 024-045
(6)
Remove the door.
TASK 32-22-11-404-033
2. Wheel Well Doors Installation (Fig. 401)_____________________________
A. Equipment
(1)
Spring Scale - 100 pounds capacity
B.
Consumable Materials
(1)
Aluminum oxide closed coat cloth, 180 grit, Federal Specification P-C-451 or Garnet closed coat abrasive paper, 180 grit, Federal Specification P-P-121 (AMM 20-30-51)
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