Remove the lens and collapse the bellows to protect them for shipping.
Losen the 4 knobs holding the light head (and condenser unit if so equipped) and remove the head.
The head and condenser unit should be well wrapped in thick padding and boxed by itself. You might want to separate the condenser unit from the lamphouse and pack these separately.
Crank the carriage most of the way up on the rails to relax the counterbalance springs. If you raise it high enough the carriage should be high enough to largely protect the counterbalance springs on top of the column.
You should have one person hold the column while a second person removes the 3 base clamp screws and short clamping bars.
Now the column & carriage (stays together) can be lifted away from the base. This is by far the largest and heaviest component and needs a strong box and generous packing such as air-pillow packing or balled up newspaper.
The column and base needs to be carefully packed in a sufficiently large box so that you can insert sufficient padding between the column & carriage assembly and the inside of the box. The column & carriage assembly should stay together (dont attempt to disassemble).
You need to pay particular attention to safeguarding the counterbalance springs (the housings at the top of the column as they are easily bent and ruined in shipping if not protected from blows or force against them). The Micromega focusing unit (standard on the D6) is also easily damaged if it receives a blow or force. Therefore, this too requires particular care in packing so that it isnt damaged in shipping. The Micromega focusing unit can be removed and packed separately if wanted.
The baseboard should be wrapped and boxed separately. You can leave the clamping hardware on the baseboard along with the clamp bars and the screws. Its a good idea to snug the screws so that the screws, spacers, and clamps wont get lost.
Obviously, the packages:
1. Column & baseboard
2. Lamphouse & condenser unit (this could be in 2 separate packages, but dont have to be separated).
3. Baseboard and column-mounting hardware
Should be marked "FRAGILEPLEASE HANDLE CAREFULLY"
Theres a D6 photo and parts list for reference here by choosing Discontinued Enlargers and then clicking onto the D6 photo.
http://www.khbphotografix.com/omega/