From my photos, the control lever knob looked to be just about the same diameter as the steering column, which is about 1.5 in. The red control lever ball on a 318 is 1 9/16 in.The "go" lever ball is 2.5"
And since reading is hard: the hydraulic control lever balls (H3) are 1.25"
Very true, including round knobs made from different materials.Places like Grainger/MSC/McMaster-Carr all sell knobs of varied diameters with threaded inserts.
I meant I misread your OP, and measured the hydraulic lever knobs first... 🤡From my photos, the control lever knob looked to be just about the same diameter as the steering column, which is about 1.5 in. The red control lever ball on a 318 is 1 9/16 in.
Thanks for taking the time to put a caliper on your lever and hydraulic control balls. As for "reading" I could find no reference in either Deere parts catalogue/service manual or any garden tractor forum where this might be mentioned. I found mention of the brake lock knob, given as 1.25 in. in diameter which matched my own measurement. Now anyone looking for this data will see your post!
Looks like mjydrafter's caliper suffered a misfire. Lacking solid data, I ordered one from JD paying their usual full freight.The "go" lever ball is 2.5"
Apology accepted. My guess is that eventually you'll learn how to read the thing properly and that over time you can rely on writing the result on a slip of paper instead of taking a photo. Incidentally, a knob that's 2.5 in. in diameter will nearly strike the steering wheel. Thanks again for taking the time to chime in.Jeez, sorry, I need to use my digital caliper like you and take a picture, apparently...