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B.  Set parking brake.
NOTE:  Setting the parking brakes will hold the brake disks aligned for wheel installation. If brake disks misalign when brake pressure is off, it will be necessary to align brake disks before installing wheel.
C.  Jack axle to raise wheel and tire assembly clear of ground (Ref Chapter 7).
WARNING:  REMOVE AND INSTALL THE MAIN WHEEL AND TIRE ASSEMBLIES ONE AT A TIME IF YOU NEED TO REPLACE EACH OF THE TWO ASSEMBLIES. THIS IS TO PREVENT INJURY TO PERSONS OR DAMAGE TO EQUIPMENT IF THE AIRPLANE ACCIDENTLY FALLS OFF OF THE JACK.
D.  Deflate tire (Ref 32-45-0 MP).
WARNING:  FAILURE TO DEFLATE TIRE COULD RESULT IN INJURY IF A DEFECTIVE TIRE/WHEEL SHOULD EXPLODE.
(1)  If tire cannot be deflated, back off valve stem slowly while applying a slight pressure on the valve stem during removal.
WARNING:  EXCESSIVE TWISTING FORCE CAN CAUSE SEPARATION OF VALVE CORE PARTS. STAY OUT OF VALVE PATH DURING REMOVAL OR INJURY MAY RESULT.
May 01/99 32-45-11 Page 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.

E.  Rotate eight Cam-Loc fasteners and remove hubcap fairing (outboard wheels only) (Fig. 401).
F.  Break lockwire, remove three sets of attaching bolts and washers, and remove hubcap.
G.  Remove axle nut retainer ring and axle nut (Detail A).
H.  Remove washer and outer wheel bearing.
I.  Install axle thread protector.
J.  Position wheel change dolly, raise wheel and remove.
K.  Remove retaining ring grease seal and inner wheel bearing.
4.  Prepare for Installation
A.  Perform special check on tire and wheel (Ref 32-45-0 I/C).
B.  Remove the axle thread protector.
C.  Check axle nut threads for nicks, burrs, deformed threads.
D.  If axle nut threads have nicks, burrs, or deformed threads, do a dimensional check on the axle and axle nut (Ref 32-11-85 I/C).
E.  Lubricate inner and outer wheel bearing and grease seals with grease.
F.  Check and align brake disks if necessary.
5.  Install Main Gear Wheel
A.  Install axle thread protector.
B.  On axles without axle sleeve retaining bolt installed, check for outboard migration of axle sleeve. Drive sleeve inboard by tapping with a soft block of aluminum to ensure sleeve is seated against inboard wheel spacer prior to installing wheel (Fig. 401).
C.  Install inner wheel bearing, grease seal, and retaining ring in inboard side of wheel.
584 
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504  Main Gear Wheel Installation 
Feb 20/90  Figure 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  32-45-11 Page 403 

D.  Position wheel assembly on dolly and slide into position on brake and axle.
NOTE:  Make sure the rotor drive keys on the wheel fully engage the key slots in the brake rotors.
E.  Install outer wheel bearing and washer.
NOTE:  Check that washer is installed with outer diameter tapering in toward wheel bearing with locking key on outboard side of washer.
F.  Remove axle thread protector.
G.  Lubricate threads with grease and install axle nut.
(1)  
While rotating wheel, tighten axle nut to 300 pound-feet lube torque.

(2)  
Loosen nut to zero torque.

(3)  
While rotating wheel, retighten to 150 pound-feet in one continuous rotation of the axle nut. This method will prevent improper reading of the break-away torque resulting from stop and start rotation of the nut. Check for alignment of locking holes.

(4)  
If locking holes are not aligned, continue tightening to first locking hole.

H.  Install axle nut retainer ring.
I.  Install hubcap using three sets of bolts and washers. On outboard wheels, align hole in hubcap with tire pneumatic valve extension prior to installing bolts. Install lockwire on all bolts.
J.  Place hubcap fairing on hubcap and secure by rotating eight Cam-Loc fasteners (outboard wheels only).
K.  Prior to let down, check tire for proper pressure (Ref Chapter 12, Landing Gear Tire Servicing and 32-45-0 MP).
L.  Lower main gear and remove jack.
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NOSE GEAR WHEEL - REMOVAL/INSTALLATION
1. General
A.  Matching of tires on dual nose wheels is recommended to prevent any tendency to shimmy from uneven ground contact areas. Whenever possible, install tires having equal pressure and inflated diameters within 5/16 inch and matching tread design.
　
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