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Carefully remove the antenna wire by loosening the two bolts that attach it to the mast housing and gently remove it from the housing.
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Remove the antenna motor by removing the two bolts attaching it to the gear housing and pull the motor of of the housing. Do not attempt to power up the motor if the antenna hasn't been run for a long time.
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The antenna motor has to wires. The green and blue wire are to run the motor in either direction to feed in or feed out the antenna mast. To run the motor connect either wire to 12 Volt positive and connect the housing of the motor to ground. If the motor is not working you can find a repair guide here.
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In the next step we have to fully extend the antenna mast. This can either be done by hand by turning the flexible drive gear connector coupling or by using the motor. To use the motor mount it back onto the housing , ground the antenna housing to an 12 volt power supply and connect the green wire to the positive lead.
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After the antenna mast has been fully extended remove the two bolts that attach the antenna mast housing to the drive gear housing. Loosen the antenna mast housing and reconnect the motor to the green lead. Run the motor until the nylon of the mast has been transported out of the drive gear housing and remove the antenna mast housing with mast.
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Manually retract the old mast by hand. Once the old mast is fully retracted push the old mast downward and out through the top nylon bushing and fully remove the mast. Remove the top bushing from the mast housing. REMEMBER how far the mast sits above the top bushing as you can set the hight during reassembly.
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Completely disassemble the drive gear housing and clean all parts from old hardened grease. Be careful when removing the spring loaded pressure liner to not loose the small springs within the pressure liner.
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Reassemble drive gear in reverse order and make sure to lube all the moving parts accordingly and sufficient. Mount the motor and run drive gear to make sure drive gear is running smooth in both directions.
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To reassemble the antenna follow these instructions in reverse order. When installing the mast from the bottom into the mast housing make sure not to damage the antenna pick-up inside the mast housing. Use the blue wire of the motor to feed in the nylon of the mast
To reassemble the antenna follow these instructions in reverse order. When installing the mast from the bottom into the mast housing make sure not to damage the antenna pick-up inside the mast housing. Use the blue wire of the motor to feed in the nylon of the mast
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The are more nylon and plastic parts in these old power antennas than just the nylon cord that moves the mast. It is also the pressure liner, the top and lower bushings and in the case of the 1956, 1957 and 1958 CADILLAC power antenna also the flexible drive gear coupling. Over the decades the materials simply have become brittle and break.
