Billybob,

Wow! Thanks for the detailed description.

From the "oris" diagram, it looks like one needs to remove the factory "nut plates" that are normally behind the sheet metal, and replace them with the
part 30, 23 & 47 sandwich? is that right?

Tripling the thickness of the bearing surfaces around the body would be a substantial improvement -- aside from the tube section carrying the load!

How does the connection between arm #36 and the main beam #23 work?
Is it bolted through the beam?

__________________
--frankb

1982 300TD 617.912 <NLA> . 1975 2002 E10-EFI . 1976 914c6 . 1983 MG LMIII <NLA>. 1988 Montero / 616<NLA> . 2001 TLS . 2005 Saab 9-5 Wagon

Yes the factory ouside fasteners are two bolts held together by a small sheet metal section, that is removed and in the case of this hitch #41 is placed inside the chassis and two #50 bolts secure the #23 main bar to #41 sandwiching the chassis sheet metal. Part #30 is the same as #31 both are stamped brackets which bolt to the ouside ends of #23 main bar to which the Euro bumper itself is attached.

The connection between the arms #36 & 32 and the #23 main beam is #49 a single M14 bolt with a 19 mm hex head, this bolt passes through the main beam itself and through the end plate which is welded behind it, about 1/2" of steel total! The arms #36 & 32 are fitted with an internal insert welded into place which has a threaded center hole into which # 49 threads. The end of the long cross tube which makes up #23 is cut at an angle allowing access to the head of #49.

Found an online copy of the ORIS typ 115/4 manual, a photo of which was posted earlier by Billybob.
Posting for others interested in adapting a real tow hitch to 300TD/123 wagons.

Its here.

__________________
--frankb

1982 300TD 617.912 <NLA> . 1975 2002 E10-EFI . 1976 914c6 . 1983 MG LMIII <NLA>. 1988 Montero / 616<NLA> . 2001 TLS . 2005 Saab 9-5 Wagon