(2)
BF Goodrich wheels, the main landing gear wheels are made from forged aluminum and are a split wheel assembly for ease in mounting tires. The inner surface of the rim of each wheel half is the sealing surface against which the tire bead rests. The inner and outer wheel halves are mated and fastened together with 16 equally spaced tie bolts, secured with washers and nuts. Leakage of air from the tire through the wheel half mating surfaces is prevented by a packing mounted on the surface of the inner wheel half. Another packing mounted on the inner surface of the inner wheel half seals the hub area of the wheel against dirt and moisture. Eight inserts (keys) installed over bosses in the inner wheel half rotate the brake rotors as the wheel turns. Stainless steel heat shields mounted underneath and between the inserts, keep excessive brake generated heat from the wheel and tire.
(3)
A tire inflation valve with an integral tire pressure gage is installed in each outer wheel segment. An over-inflation valve is installed in each outer wheel half to relieve pressure at 375-450 psig to prevent excess pressure buildup.
(4)
Two tapered roller bearings are installed in the hub of each wheel.
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MAINTENANCE MANUAL
INNER OUTER WHEEL WHEEL HALF HALF OVER
PACKING INFLATION (SEAL) VALVE
INFLATION VALVE (NOT SHOWN)
GREASE
RETAINER HEAT SHIELD (TYPICAL-
BEARINGALL AROUND) (2 PLACES)
A
TIE BOLTS (18 PLACES)
BRAKE ROTOR
A (9 PLACES) DRIVE KEY PLUG THERMAL FUSE
SEE A A (3 PLACES)
INNER WHEEL TIRE HALF
OUTER WHEEL
HALF
INFLATION VALVE
BEARINGS
HUBCAP
COUPLING
AXLE (REF) TRANSDUCER
PACKING (SEAL)BRAKE ASSEMBLY (REF) PACKING (SEAL)
A-A
Main Gear Tire and Wheel Assembly (Dunlop Wheel) Figure 1 (Sheet 1)
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TIE BOLT (16 LOCATIONS)
A (8 LOCATIONS) (8 LOCATIONS) BRACKET BRAKE ALIGNMENT BRAKE ROTOR KEY
A HEAT SHIELD ALL AROUND) (EXAMPLE,
SEE A
HALF INNER WHEEL
STEEL BRAKE BF GOODRICH
(REF) AXLE
(REF) ASSEMBLY BRAKE
A-A
INFLATION VALVE
BEARING (2 LOCATIONS)
OVER INFLATION VALVE (NOT SHOWN)
THERMAL PLUG
(4 LOCATIONS)
A
TIRE
OUTER WHEEL HALF
INFLATION VALVE BEARINGS HUBCAP
COUPLING
TRANSDUCER
PACKING (SEAL)
PACKING (SEAL)
Main Gear Tire and Wheel Assembly (BF Goodrich Wheel)
Figure 1 (Sheet 2)
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(5)
Dunlop wheels, four thermal relief plugs in each inner wheel half prevent tire blowouts due to excess brake heat. The plugs will melt to release tire pressure at approximately 390°F (199°C).
(6)
BF Goodrich wheels, three thermal relief plugs in each inner wheel half prevent tire blowouts due to excess brake heat. The plugs will melt to release
tire pressure at approximately 390°F (199°C).
B. Nose Gear Wheels (Fig. 2)
________________
VALVE INFLATION
RING RETAINER BEARING
TIRE (10 PLACES) TIE BOLT
HALF WHEEL OUTER
SEE A
Figure 2 Nose Gear Tire and Wheel Assembly
PACKING
(SEAL)
BEARING
(2 PLACES)
OVER INFLATION VALVE
BALANCE WEIGHT (10 PLACES)
INNER WHEEL HALF
A
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(1)
The nose landing gear wheel assembly is made from forged aluminum and is a split wheel assembly for ease in mounting tires. The inner surface of the rim of each wheel half is the sealing surface against which the tire bead rests. The inner and outer wheel half assemblies are mated and fastened together with 10 equally spaced tie bolts, secured with washers and nuts. Leakage of air from the tire through the wheel half mating surfaces is prevented by a packing mounted on the surface of the inner wheel half. Retaining rings installed in the hub of the inner and outer wheel halves hold the bearing grease seals and bearing cones in place. These seals retain the bearing lubricant and keep out dirt and moisture.
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