If you have oil dripping out the bottom of your electric chainsaw, then a perished oil tube is the most likely reason why.
The oil is for the chain auto-oiling feature and is primed by the rubber bulb on the tank cap, the plastic tubing routes it under the casing to the oil pump underneath and onto the bar and chain.
Long story short, you need to almost completely dismantle the chainsaw to access the oil tube.
Step 1: Dismantling
You start by taking off the bar and chain with its tensioning cover, and then remove the flying circlip on the chain drive cog, slide the cog up with the shield and short spring underneath.
The main body side cover can now be removed, remove also the 3 screws on the black motor side cover where you access the brushes, the long one that goes through the handle and the 2 shorter ones.
There's a concealed screw behind the trigger under a clip on cover.
The 3rd pic Im using is an later complete pic to label the items to be removed.
Dont pull off the armature nut because we'll be pulling up the whole assembly and it probably needs an impact hammer anyway. The larger fiber plastic cog with its bearing came out with all my pulling and tugging, but can be left with the armature.