This is the Oil Level Plug with a decal pointing to it.
This plug on both sides will not unscrew and previous mechanics have damaged them both sides. They are stuck and I can't open them without destroying them, I think. I need to order replacement parts in case I damage them further.
I cannot find a part number for this part. It is shown on the Hydrostatic Ground Drive Assemblies page and is located on the parts illustration between Parts # 10 and #11.
I want to buy two Oil Level Plugs. What part number is this?