http://www.peachparts.com/shopforum/tech-help/308281-help-stuck-road-722-3-no-3rd-4th-gear-4.html
see army's reply #53 which has a Link to the Russian ILCAT with pictures and
Part numbers.
http://mb.ilcats.ru/part/class/1/ccode/F/cat/67R/type/722/subtype/315/group/27/subgr//vers//imgno/7
#493 in the ILCAT is the "Locking Ring"(Circlip we'd call it) you see inset into the
orifice.
#s 484,487 and 490 are all "Seal Rings" (O-rings to us)
If the #484 is the problem it looks like the Secondary Pump has to be pulled out
to get to it.
If either 487 or 490 (Or both)are the problem , you can access them by pushing in the Cover "Slightly" and removing the "Locking Ring".
All Kinds of reading here:
PeachParts Mercedes ShopForum - Search Results
and here:
PeachParts Mercedes ShopForum - Search Results
Please note the ILCATS parts numbers are specific to the Transmission that
is listed AND MAY NOT BE THE SAME FOR YOUR TRANSMISSION.
You can however Look up your Parts Numbers on ILCAT or the MBUSA
website:
EPC-net Online - Subscription Step 1 of 3
If you're a US customer the Site is FREE,they'll ask for a U.S. Based credit card number to prove you're one of their customers,But no charges will accrue.
The ATSG manual for your transmission would be a great help!
A Link for it is here somewhere in the archives ("Advanced, Search" Option)