(b)
Check for fluid leakage around valve body and at tubing connections.
(4)
Examine wheel speed transducers.
(a)
Check tightness of exciter ring in wheel hub and condition of potting.
(b)
Check security of transducer attachment hardware, access plate, and lockwiring.
(c)
Check transducer housing for damage and deterioration of potting.
(5)
Ensure electrical power is available.
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Aug 01/75 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 32-42-0 Page 601
B. Examine Antiskid System
(1)
Set inboard and outboard antiskid switches on pilots panel to ON position.
(2)
Set parking brake.
(3)
On antiskid control unit in electrical equipment compartment, ensure all lights are off.
(4)
Place system test switch, located on antiskid control box, in right position. Check for the following conditions:
(a)
LO and Ll lights are on.
(b)
Upon release of switch, all lights shall go off.
(5)
Place system test switch in left position. Check for the following conditions:
(a)
RO and Rl lights are on.
(b)
Upon release of switch, all lights shall go off.
(6)
If no further requirements exist, shut down electrical power.
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ANTISKID TRANSDUCER - REMOVAL/INSTALLATION
1. General
A. A transducer is installed inside each main landing gear wheel axle. Transducers are the rotating type with a drive coupling mating with a plastic spider riveted to the hubcap assembly. A sleeve type adapter, part of the transducer assembly holds the transducer in place within the axle cavity. The adapter is not removed during normal removal/installation of the transducer.
2. Equipment and Materials
A. Oil -V79TERESS0, (Ref 20-30-21), or equivalent, (SAE 40 engine oil)
B. Torque Adapter Tool -Hydro-Aire Co., Part No. T-33264, used for removing transducer lockring. Hydro-Aire Div., Crane Co., 3000 Winona Ave., Burbank, California
C. Adapter-Antiskid Transducer Spin-Up - A32075-1 (Optional),
A32075-9 (Optional),
A32075-10 (Preferred)
D. Drill - capable of 500- to 1000 RPM to be used with transducer spin-up adapter. Recommended drill: Chicago Pneumatic, Part No. CP-9289-9
E. Gear Ground Lock Assembly (Ref 32-00-01)
3. Remove Transducer (Fig. 401)
A. Ensure gear ground lock assembly is installed in nose gear (Ref 32-00-01).
B. Open OUTBD ANTISKID, INBD ANTISKID, ANTISKID FAIL WARN & PARKING BRAKE, and ANTISKID TEST circuit breakers on P6 control panel.
C. If gaining access to outboard wheel transducer, remove hubcap fairing by rotating eight Cam-Loc fasteners.
D. Remove three bolts and remove hubcap from wheel.
E. Remove screw, washer, and drive coupling from end of transducer shaft.
F. Remove transducer lockring using torque adapter tool.
G. Guide transducer out of adapter in axle only far enough to gain access to electrical connector.
CAUTION: AVOID EXCESS PULL ON TRANSDUCER ELECTRIC CABLE.
H. Disconnect electrical connector and remove transducer.
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4. Install Transducer (Fig. 401)
A. Connect transducer to cable by engaging electrical connector.
B. Align key slot in transducer housing with projecting rivet head in adapter and guide transducer in place in axle cavity.
CAUTION: IF KEY SLOT IN TRANSDUCER HOUSING IS NOT PROPERLY ALIGNED WITH RIVET HEAD IN ADAPTER, TRANSDUCER HOUSING MAY BIND IN ADAPTER AND DAMAGE TO TRANSDUCER, TRANSDUCER SHAFT, OR DRIVE COUPLING MAY RESULT DURING NEXT REMOVAL.
C. Install lockring and tighten to 260 +20 pound-inches torque using torque adapter tool. Lockwire lockring to adapter.
D. Check felt dust seal on outer end of transducer. If dry, saturate felt with oil.
E. Install drive coupling, washer, and retaining screw on splined end of transducer shaft. Lockwire screw to drive coupling. Ensure drive coupling turns freely in transducer.
F. Check applicable transducer operation.
(1)
Pressurize hydraulic systems A and B (Ref 29-11-0 and 29-12-0 MP).
(2)
Provide electrical power to antiskid system.
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