Removal and Replacement of Control Radio Set C-6287/ARC-51BX (ARC-51BX Control Head)

TM 11-5821-285-12-1

(2) Rotate the electrical twist lock connectors

(2) Cut and remove the safety wires from the

counterclockwise from mating connector on rear of KY-

wingnut fasteners on the ARC-51BX mounting with a pair

28 control head.

of diagonal pliers. Loosen and swivel the two wingnut

(3) Remove KY-28 control head from console.

fasteners upward to disengage the latches on the ARC-

b. Replacement.

51BX mounting.

(3) Grasp both handles on the dust cover of the

(1) Install KY-28 control head unit into con- sole.

ARC-51BX and slide the ARC-51BX off its mounting.

(2) Connect electrical twist lock connectors clockwise

b. Replacement.

with mating connector on rear of KY-28 control head.

(1) Slide the ARC-51BX into its mounting.

(3) Secure KY-28 control head into console by tightening

(2) Swivel the wingnut fasteners downward to

six Dzus fasteners.

engage the latches on the ARC-51BX mounting. Tighten

the wingnut fasteners and secure the safety wire

5-16. Removal and Replacement of Control

between the mounting and each wingnut fastener.

Radio Set C-6287/ARC-51BX (ARC-51BX

(3) Connect the antenna and power control

Control Head)

cables.

a. Removal.

(1) Rotate the four (or eight, as applicable) Dzus

5-18. Removal and Replacement of Receiver-

fasteners one-quarter turn counterclockwise.

Transmitter, Radio RT-1167/ARC-164(Vl

(2) Pull the ARC-51BX control head from its

(ARC-164)

mounting in the console as far as it will go.

a. Removal.

(3) Disconnect the control cable from the rear of

(1) Be sure that power to the ARC-164 is OFF.

the ARC-51BX control head.

b. Replacement.

(2) Rotate the eight Dzus fasteners that hold the

ARC-164 in the console 1/4 turn counterclockwise. Pull

(1) Connect the cable from the console to the

ARC-164 gently.

connector on the rear of the ARC-51BX control head.

(3) Turn the electrical twistlock connector

(2) Reinstall the ARC-51BX control head in its

counterclockwise from the rear of the ARC-164.

mounting in the console.

(4) Remove the antenna connector from the rear

(3) Rotate the four (or eight, as applicable) Dzus

of the ARC-164 (J2).

fasteners one-quarter turn clockwise.

b. Replacement.

(1) Plug the antenna connector into the antenna

5-17. Removal and Replacement of Receiver-

receptacle and secure.

Transmitter, Radio RT-742/ARC-51BX

(2) Connect the electrical twistlock connector to

(ARC-51BX)

electrical receptacle (J1) and secure by turning

a. Removal

clockwise.

(1) Disconnect the antenna and power control

(3) Secure the ARC-164 to the console by

cables from the ARC-51BX.

rotating eight Dzus fasteners 1/4 turn clockwise.

5-5