3-Point Hitch TC30 3 point adjustable link

   / TC30 3 point adjustable link #1  

michael.white

Silver Member
Joined
Dec 9, 2006
Messages
126
Location
Dripping Springs, Texas
Tractor
New Holland TC30
Back in April of '23, my 3 point adjustable link (SBA370011581) broke:
IMG_20250704_130645855.jpg

I've been told that, since they're cast, they can't be welded. Of course, I didn't know that at first and I guess the guy I paid to weld it didn't know that either because what you're seeing above is the second time it broke. Anyway, I bought the tractor used back in '12 and figured maybe it was a bit abused, so I coughed up the $300 for a New Old Stock (NOS) one. Two years later, here's the NOS one:
IMG_20250704_130656351_HDR.jpg

AFAIK, I don't abuse my tractor - it gets used five times a year to 5' bush hog 4 or so moderately bumpy acres, pulls a 5' tiller and a two bottom plow through a 1000 square foot garden, and sometimes I hook up a log splitter. Dad's got a Ford 1700 with twice my 600 hours, and his adjustment link has bent but never sheared like this.

Now NOS ones are $500. I said screw that, I'm going to figure out something else. Here's what I came up with (NOTE: you will bend a fender):
IMG_20250704_130935574_HDR.jpg


These generic adjustment links (SKU 159750, I think for Kobota and others) are under $35, but the pivot part at the top is 3/4" while the TC-30 uses 7/8". So I removed the arm (you need a 10mm socket, some snapring pliers, and a hammer) and removed the 7/8" pin. I then bought a spacer that's used for a camshaft to reduce from 7/8" to 3/4" off of Amazon: Amazon.com

I trimmed the spacer down using a Dremel cut-off wheel to the same width as the 7/8" opening on the arm. If it's a bit short or long, that's OK. Hacksaw would also work.

I then bought nuts and bolts from McMaster-Carr (you can save some $$ if you can find them locally):
  • Zinc Yellow-Chromate Plated Hex Head Screw, Grade 8 Steel, 3/4"-16 Thread Size, 6" Long, Fully Threaded (92620A881)
  • Zinc Yellow-Chromate Plated Grade 8 Steel SAE Washer with Material Certificate, for 3/4" Screw Size, 0.812" ID, 1.469" OD (98023A121)
  • Zinc-Yellow-Chromate-Plated Steel Split Lock Washer for 3/4" Screw Size, 0.766" ID, 1.265" OD (91104A047)
  • High-Strength Steel Hex Nut Grade 8, Zinc Yellow-Chromate Plated, 3/4"-16 Thread Size (94895A840)
  • High-Strength Steel Thin-Profile Hex Nut Zinc Yellow-Chromate Plated, 3/4"-16 Size (93839A840)
I went with fine threads to hopefully reduce the sliding friction. I used a press to push the following into the arm (make sure you're pusing them in the right orientation):
  1. Bolt
  2. Lock washer
  3. Flat washer
  4. Spacer
Once the flat washer is flush with the arm, put the bolt head in a vise, add a flat washer and nut, then tighten good and tight. Re-install the arm onto the tractor. Grease up the bolt. Install the adjutable link and add a regular nut and a thin-profile nut as a lock nut on the end. Jam the thin-profile nut into the regular nut.
IMG_20250704_130906894_HDR.jpg


Again, you will dent your fender if you use this:
IMG_20250704_130923148.jpg

At this point I don't care about the dent - it's not a show tractor and it doesn't impact anything. I plan on giving it the rattle can treatment next time I remember to buy some.
All-in-all I'm in under $200, and that's including a second adjustment link (spare), a spare bolt, extra nuts, and extra washers. If you can find local hardware, you'll likely be in under $100. Plus if the link breaks again, it's much easier to find these generic links versus the New Holland ones.
I've used this to bush hog over my acres (takes a few hours) without issue. Anyway, hope this is helpful to anyone in a similar situation (or who knows someone in a similar situation).
 
   / TC30 3 point adjustable link #2  
Amazing what could be replaced with a turnbuckle and a short few lengths of chain.

Lift links are not sacred , nor magic.
 

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