Parts information is correct. Where the parts are used is reversed.
118357-ES New Holland Part # 118357ES $4.33 Amazon 7 left in stock 316159A1 These are the return line washers. While my book says you need 3, just for the bottom, in practical use, need 6, one on top and one on bottom.
Washer Injector (body to head) Sealing (9/16 x 13/16 x 1/16) PN 118358-ES. Need 3, BARECO part number B224
Massey Ferguson part # 0920113
SPAREX # S.6372 Washer Injector (body to head) Sealing (9/16 x 13/16 x 1/16) PN 118358-ES
I apologize for reversing the use of these two washers. The good news is a google/bing search in the future will help out the next guy.
As for the copper/thin metal return line washers, I intend to order quite a few, and replace them on my Dextas, and I'm up to four on hand now and one I haven't troubleshot and started on. I'll use a handfull of them.
I fully believe in my gut before I even put the washers on, this accounts for much of the Dexta cranking then starting issues we often confuse with wear. Minute air bleed off the culprit.
I have one Dexta, I rebuilt myself, that hadn't been started in over 6 months (need to replace tranny). Just over freezing (34 d) and bump, she started without priming. Those washers were new out of scrap (excess) washers I had from an old govt DRMO buy.