Radio Set AN/GRC-106 (Hulls 8540-8560 and 8580-8618)

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Figure 6-3. Radio set. AN/VRC-47 (hulls 8540-8560 and 8580-8618).

TM-55-1905-217-34 Landing Craft Mechanized; Steel; DED; Overait Length 74 Feet Mod 1 Marl VIII Navy Design LCM-8 Manual

Figure 6-4. Radio set AN/GRC-106 (hulls 8540-8560 and 8580-8618).

TM 55-1905-217-34

CAUTION

Disconnect ground cable of battery assembly prior to removal of components.

(1) Remove communications cabinet front panel by unfastening thumbscrews. Retain panel.

(2) Disconnect speaker cable at the audio connector on receiver R-442/VRC and remove the speaker.

(3) Disconnect the transmitter antenna's to cables at antenna base. Tape cable ends and oil and stow cables at

bulkhead clamp loop.

NOTE

Record position of cable wires on studs or connectors to assure correct reinstallation of

cables.

(4) Disconnect the two transmitter antenna cables at receiver transmitter, loosen feed- through connectors at top of

cabinet. Tape cable ends and stow cables at clamp loop.

(5) Disconnect receiver antenna cable at base of antenna.

(6) Disconnect receiver antenna cable at receiver. Loosen feed-through connector and remove and retain cable.

(7) Remove microphone cable from connector on the receiver-transmitter RT-524/VRC.

(8) Remove interconnect cable between receiver-transmitter and the receiver. Disconnect cable at a connector J11

on receiver and connector J23 on receiver-transmitter. Remove and retain cable.

(9) Disconnect power cable and shield ground at connector J21 on transmitter. Tape and stow cable at bulkhead.

(10) Remove transmitter antenna and antenna top section from support bracket. Retain antenna and top section.

(11) Remove receiver antenna and base from support bracket by removing screws, nuts and washers. Retain.

antenna, base and attaching hardware.

(12) Disconnect power cable from terminal board at base of communications cabinet. Tape and stow cables at

bulkhead.

(13) Remove the receiver-transmitter units from their respective mountings.

(14) Reinstall the communications cabinet from panel. Connect battery ground cable.

b. Repair. Refer to TM 11-5820-401-10.

c. Installation. Install components in reverse order of removal. Be certain that proper polarity is observed in

connecting input cable.

6-4. Radio Set AN/GRC-106 (Hulls 8540-8560 and 8580-8618)

a. Removal. Refer to figure 6-4 and proceed as follows:

6-7