HP DAT40 (DDS4) drive

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Capstan subunit

This subunit contains two motors that drive the reels inside the cartridge.

Disassembly

The drive must be disassembled (as described on the main page) first.
After the main metal mounting plate with the drum subunit was removed, you should now see the capstan subunit in the plastic chassis of the drive. There is still a lever above it:

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Remove the lever (leave the spring in place):

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Now the capstan subunit is ready for disassembly:

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There is a nut on top and a spring below the metal plate:

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With this nut the azimuth (angle) of the capstan shaft against the tape can be adjusted.
A slotted screwdriver can be used from the top.

To remove the capstan subunit the nut must be removed first.
Thread bolt after nut was removed:

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Now remove the two screws and pull out the capstan subunit.
The motor looks like this:

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If you look at the chassis, you see two points where the capstan subunit touching (and can be tilted over):

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To disassemble the thread bolt, remove two screws on the bottom of the chassis:

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Reassembly

After reassembly of the capstan subunit, install the lever again:

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