Army, attached is photo of the guide rod (see red). 26 is the guide rod mount, and coming forward from the mount is the guide rod, which is adjusted forward and backward on the mount. Parts 38-47 anchor the two together. All the parts places refer to this rod as the Guide Rod. Mercedes calls it a lateral something or another.
Zacharias 
Diesel grump
Zacharias, it takes a while to get familiar with where to find the drawings, and I sometimes forget where I got it in the first place, but they are very helpful for the thankfully, meager cost.