(2)  
With the brake pedals released, pull the parking brake lever until it stops.

(3)  
With the parking brake held in the up position, turn the switch until the switch actuating roller touches the rod end of the lower pushrod.

(4)  
Tighten the switch mounting bolts.

N.  Install both access panels (13) and (14) below thrust lever on left side of control stand.
O.  Install left stabilizer trim control wheel (15) with handle 90 +15 degrees apart from handle on right trim control wheel.
P.  Remove rigging pin from jackshaft and pedal shafts.
Q.  Test parking brake operation (Ref 32-44-0 A/T).
5C8 
32-44-11 Page 402  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  Oct 20/91 

515  Parking Brake Linkage Installation 
Oct 20/91  Figure 401 (Sheet 1)  32-44-11 
Page 403 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

Parking Brake Linkage Installation  515 
32-44-11  Figure 401 (Sheet 2)  Oct 20/91 
Page 404 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

515  Parking Brake Linkage Adjustment 
Oct 20/91  Figure 401 (Sheet 3)  32-44-11 
Page 405 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

PARKING BRAKE SHUTOFF VALVE - REMOVAL/INSTALLATION
1.  Equipment and Materials
A.  Gear Ground Lock Assembly (Ref 32-00-01)
2.  Remove Parking Brake Shutoff Valve
A.  Check that gear ground lock assembly is installed in nose gear (Ref 32-00-01).
B.  Chock wheels and release parking brake.
C.  Open ANTISKID FAIL WARN & PARKING BRAKE circuit breaker on load control center panel P6.
D.  Disconnect electrical connector at valve.
E.  Depressurize hydraulic systems A and B (Ref 29-11-0, Maintenance Practices and 29-12-0, Maintenance Practices).
F.  Disconnect and plug hydraulic lines from shutoff valve (Fig. 401).
G.  Remove three attachment bolts.
H.  Remove parking brake shutoff valve from bracket, remove reducers, discard O-rings, and plug ports.
3.  Install Parking Brake Shutoff Valve
A.  Install reducers with new O-rings in parking brake shutoff valve (Fig. 401).
B.  Install shutoff valve on the bracket in main wheel well using three attachment bolts.
C.  Remove plugs and caps and connect hydraulic lines to shutoff valve.
D.  Pressurize hydraulic systems A and B (Ref 29-11-0 and 29-12-0).
E.  Connect electrical connector to valve and close ANTISKID FAIL WARN & PARKING BRAKE circuit breaker on load control center panel P6.
F.  Depress brake pedals three times slowly and fully before setting parking brakes.
May 20/82 32-44-21 Page 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.

G.  Depress brake pedals, lift parking brake handle, and release pedals to set parking brake. Check that parking brake light illuminates on control panel control stand.
H.  Depress brake pedals fully and release. Check that parking brake light is off.
I.  Set parking brake.
J.  Check shutoff valve connection for leaks.

Parking Brake Shutoff Valve Installation  522 
32-44-21  Figure 401  Feb 15/69 
Page 402 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

TIRES AND WHEELS - DESCRIPTION AND OPERATION
1.  General
A.  Each gear (nose and main) is equipped with two tire and wheel assemblies designed to withstand high rolling speeds. All wheels have provisions for attaching balance weights for dynamic balance. After takeoff, spinning of main gear wheels and nose gear wheels is stopped by main gear brakes and nose wheel snubbers.
B.  Each outboard main gear wheel and tire is covered with a fairing attached to the outboard main wheel hubcap. Each inboard wheel is provided with a small hubcap. The wheel and tire assemblies are designated Nos. 1, 2, 3 and 4, counting from the left looking forward.
2.  Main Gear Wheel and Tire
A.  The main gear wheel assembly is made of forged aluminum. To facilitate tire installation, the assembly consists of two halves which are bolted together at 18 places around the wheel. The outside half contains a large bore pneumatic tire valve to service tubeless tires. A pressure relief valve, which will rupture at 375 to 450 psi, is provided to protect against overinflation. Air loss between the wheel halves is prevented by a preformed packing located in an annular groove of the inside wheel half. The wheel rotates on tapered roller bearings located in the end of the hubs. A molded rubber grease seal retains grease in the inside bearing area and keeps out dirt. The outside bearing area is protected by a cover assembly. Rotor drive keys on the inside circumference of the inside wheel half secure the wheel to the rotating elements of the brake. Heat shields consisting of thin steel plates mounted between the rotor drive keys protect the tire against excessive heat build up during braking. Four thermal fuses located on the inside wheel half will protect against tire explosion due to excessive heat build up during abnormal braking conditions.
　
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