Automatic Treetap contains information about the Forestry mod which is not included in the current recommended version of Technic Pack and might be outdated..
The Automatic Treetap extracts and drops resin from resin holes on IC2's rubber trees. Resin holes get exhausted by this process and will not regenerate. The dropped resin is then collected by any Rubber Tree Harvester. The Treetap needs to be powered by a BuildCraftengine.