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of excessive brake overheat and thus protect
against tire burst because of excessive
pressure.
Melting point of the fuse plug:
· first set, inside keys, 300°C (572°F),
· second set, on wheel web, 183°C (361°F).
MAIN LANDING GEAR TIRES
IDENTIFICATION
FIN: 2647GM (WHEEL 1), 2645GM (WHEEL 2),
2648GM (WHEEL 3), 2646GM (WHEEL 4)
LOCATION
ZONE: 731 (WHEEL 1 & 2), 741 (WHEEL 3 & 4)
TRAINING INFORMATION POINTS
Always use the appropriate tires on the wheels.
The Braking and Steering Control Unit is set to use
one diameter of main gear tire only (Refer to AMM).
WARNING: THE WHEEL TIRE ASSEMBLY WEIGHS APPROXIMATELY
61 KG (133 LB). BE CAREFUL WHEN YOU INSTALL
IT TO PREVENT INJURY TO PERSONS OR DAMAGE TO
THE WHEEL OR AXLE.
TMULDJX04-T01 LEVEL 3
EFFECTIVITY 32-40-00 Page 2
Oct 31/97
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 238
ALL
WHEEL AND BRAKE COMPONENTS - MAIN LANDING GEAR WHEELS
TMULDJX04-P01 LEVEL 3
EFFECTIVITY 32-40-00 Page 3
Oct 31/97
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 239
ALL
WHEEL AND BRAKE COMPONENTS
CARBON BRAKES
IDENTIFICATION
FIN: 2643GM (WHEEL 1), 2641GM (WHEEL 2),
2644GM (WHEEL 3), 2642GM (WHEEL 4)
LOCATION
ZONE: 731 (WHEEL 1 & 2), 741 (WHEEL 3 & 4)
DESCRIPTION
Each brake includes:
- a piston housing,
- a carbon heat pack.
The piston housing has:
- two independent hydraulic sets (normal and
alternate) of 7 pistons,
- a bleeder for each of the two systems,
- a half self-sealing coupling for each system,
- a torque tube,
- two wear indicators for the heat pack,
- a brake temperature sensor.
Three bolts and nine pins attach the brake to the axle
flange of the landing gear.
Brake weight: 67 kg (147 lb).
TMULDJX04-T02 LEVEL 3
EFFECTIVITY 32-40-00 Page 4
Oct 31/97
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 240
ALL
WHEEL AND BRAKE COMPONENTS - CARBON BRAKES
TMULDJX04-P02 LEVEL 3
EFFECTIVITY 32-40-00 Page 5
Oct 31/97
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 241
ALL
WHEEL AND BRAKE COMPONENTS
CARBON BRAKES (CONTINUED)
BLEED VALVES
(see following page).
WEAR PIN INDICATORS
Two wear pins give a visual indication of the overall
wear of the heat pack without removal (Parking brake
applied).
For the minimum length X of the wear pin indicator
refer to the AMM.
TMULDJX04-T03 LEVEL 3
EFFECTIVITY 32-40-00 Page 6
Oct 31/97
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 242
ALL
TMULDJX04-P03 LEVEL 3
WHEEL AND BRAKE COMPONENTS - BLEED VALVES - WEAR PIN INDICATORS
EFFECTIVITY 32-40-00 Page 7
Oct 31/97
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 243
ALL
WHEEL AND BRAKE COMPONENTS
TACHOMETERS
IDENTIFICATION
FIN: 19GG (WHEEL 1), 21GG (WHEEL 2),
20GG (WHEEL 3), 22GG (WHEEL 4)
LOCATION
ZONE: 731 (WHEEL 1 & 2), 741 (WHEEL 3 & 4)
DESCRIPTION
The tachometers send wheel speed information.
Each tachometer has two 200 tooth rings:
- 1 stationary ring associated to a coil and a
permanent magnet,
- 1 ring driven by the wheel.
The rotation of the wheel causes variations in the
induction frequency which are proportional to the
angular speed (Frequency = 200 x angular speed).
The variable frequency voltage supplied by the
tachometer is sent to the Braking/Steering Control
Unit (BSCU).
MAIN LANDING GEAR DRIVE TACHOMETERS
IDENTIFICATION
FIN: 2681GM (WHEEL 1), 2680GM (WHEEL 2),
2679GM (WHEEL 3), 2678GM (WHEEL 4)
LOCATION
ZONE: 731 (WHEEL 1 & 2), 741 (WHEEL 3 & 4)
AXLE WHEEL ADAPTER SLEEVES
IDENTIFICATION
FIN: 2634GM (WHEEL 1), 2633GM (WHEEL 2),
2632GM (WHEEL 3), 2631GM (WHEEL 4)
LOCATION
ZONE: 731 (WHEEL 1 & 2), 741 (WHEEL 3 & 4)
TRAINING INFORMATION POINT
Each wheel is installed on the axle with an axle sleeve.
CAUTION : WHEN YOU INSTALL THE SLEEVE, DO NOT FORGET
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