Thanks to Heav, who was kind enough to post photos of his injector
pump with the rack dampener clearly shown. I thought this would help
me solve my problem, but alas, my injector pump, of course, does not
have the dampener adjustment there, and in fact, I cannot find it
anywhere on the injector pump assembly.
FWIW, mine is a 1979 OM617 in a W123 300D