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Discussion Starter · #1 ·
Could someone please measure the diameter of the black knob mounted on the hydrostatic drive lever of a 140h1 or 140h3? The painter lost mine.

Thanks!
 

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The "go" lever ball is 2.5"

And since reading is hard: the hydraulic control lever balls (H3) are 1.25" :LOL:
 
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Discussion Starter · #3 ·
The "go" lever ball is 2.5"

And since reading is hard: the hydraulic control lever balls (H3) are 1.25" :LOL:
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!
 

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Places like Grainger/MSC/McMaster-Carr all sell knobs of varied diameters with threaded inserts.
 

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Discussion Starter · #5 · (Edited)
Places like Grainger/MSC/McMaster-Carr all sell knobs of varied diameters with threaded inserts.
Very true, including round knobs made from different materials.

The control lever threads are 3/8 coarse threads and all that M-C sells are 1.25 in diam round knobs having the same size and thread pitch insert. Ace Hardware sells a round ball knob with that size and thread pitch insert too since M-C is probably their source as well. Ace also sells a 1.5 in diam. ball with brass treaded insert but it has a 1/2" coarse thread. If both the 3/8 and 1/2 inserts were instead fine thread, one could use a 1/8-1/4 FIP FIP brass adaptor, but alas.
 

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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!
I meant I misread your OP, and measured the hydraulic lever knobs first... 🤡
 

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Discussion Starter · #8 ·
The "go" lever ball is 2.5"
Looks like mjydrafter's caliper suffered a misfire. Lacking solid data, I ordered one from JD paying their usual full freight.

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Now that we've established that the actual diameter as 1 5/8" it's worth checking McMaster-Carr. Surprise! Cheaper than JD by a factor of 10. For a dollar more you can get a red one and be the envy of all your 140 h1/h3 friends.

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As long as the thread size is right, does the ball size really matter?
 

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Jeez, sorry, I need to use my digital caliper like you and take a picture, apparently...
 
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Discussion Starter · #15 ·
Jeez, sorry, I need to use my digital caliper like you and take a picture, apparently...
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.
 
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