If you've ever spent a dusty afternoon in a hay field, you probably already know that the New Holland model 66 baler is basically the grandfather of the modern small square bale. It's one of those machines that changed the game for family farms back in the 1950s, and honestly, it's still doing the work for a lot of folks today. While modern balers are packed with sensors and computers, there's something about the rhythmic clack-thump of a 66 that just feels right.
It wasn't just another piece of iron when it hit the market; it was a revolution. Before this machine showed up, baling hay was a much more labor-intensive, agonizing process. The Model 66 brought a level of reliability and "compactness" that meant even a smaller tractor could handle the job. It's the kind of machine that makes you appreciate how far engineering has come, but also how right they got it the first time.
A Little Trip Down Memory Lane
Back in the early 50s, New Holland was really finding its stride. They had already made a name for themselves with the first "self-tying" baler, but the New Holland model 66 baler was where they really refined the idea for the average farmer. It was marketed as the "compact" baler, designed to be affordable and easy to pull.
You have to remember that back then, not everyone had a 100-horsepower tractor sitting in the shed. Most guys were pulling equipment with machines that we'd consider tiny today. The 66 was light enough and efficient enough that you didn't need a monster of a tractor to get your hay up before the rain started. It was the "everyman's" baler, and it sold like crazy because of it.
The Heart of the Machine: How It Works
If you peek under the hood—or rather, inside the frame—of a New Holland model 66 baler, you'll see a symphony of mechanical parts that have to stay in perfect sync. It's all about timing. You've got the pickup teeth lifting the hay, the feeder arms tucking it into the bale chamber, and the plunger packing it tight.
The Famous Knotter
We can't talk about this baler without talking about the knotter. For many farmers, the knotter is either their best friend or their worst enemy. When a New Holland model 66 baler is timed right, it'll tie thousands of bales without missing a beat. But if a spring gets weak or a bit of twine gets caught, well, you're going to be spending some quality time with a wrench and some grease.
The beauty of the 66's knotter is its simplicity. It's a mechanical marvel that uses a series of gears and hooks to wrap that twine and tuck the knot just right. It's satisfying to watch, though I wouldn't recommend getting your face too close while it's running!
Engine vs. PTO Models
One cool thing about the 66 is that it came in different configurations. You could get the standard PTO (Power Take-Off) version, which ran off your tractor's power. But, they also made a version with its own dedicated engine—usually a two-cylinder Wisconsin engine sitting right on top.
This was a huge deal because it meant you could pull the baler with a tractor that didn't even have a PTO, or one that didn't have enough guts to drive the plunger while also pulling the weight of the machine. It made the New Holland model 66 baler incredibly versatile for its time.
Why People Still Use Them
You might think a 70-year-old baler belongs in a museum, but you'd be surprised how many of these are still spit out bales every summer. Small-scale farmers, hobbyists, and folks with just a few acres of horses love them.
First off, they're cheap to buy. You can often find a New Holland model 66 baler in a barn or at an estate auction for a fraction of what a newer model costs. If you're only doing 500 bales a year, you don't need a $40,000 piece of equipment. You need something that works and that you can fix yourself.
That leads to the second point: repairability. There are no circuit boards here. There are no hydraulic sensors that require a technician with a laptop to diagnose. If it stops working, it's usually because something is bent, broken, or out of time. With a basic set of tools and a manual, most people can keep a 66 running indefinitely.
Finding Parts for a Classic
Now, I won't lie to you—finding brand-new, factory-stamped parts for a New Holland model 66 baler isn't as easy as it was in 1955. But because New Holland built so many of these (and the models that followed, like the 67 and 68, were very similar), there's a massive "aftermarket" and used part community.
Many parts are actually interchangeable with later models. If you need a new set of pickup teeth or a specific bolt for the plunger, you can usually find it. Plus, these machines were built with so much heavy steel that they don't just "wear out" like modern plastic-filled equipment. You might have to hunt around on eBay or at a tractor salvage yard, but the parts are out there.
Tips for Buying a Used Model 66
If you're scouring Craigslist or Facebook Marketplace for a New Holland model 66 baler, there are a few things you should look out for. You don't want to buy a "project" when you've got ten acres of hay on the ground and rain in the forecast.
- Check the Knotters: Look for rust or excessive wear on the billhooks. If the knotters look like they've been sitting in a swamp, you're in for a headache.
- The Plunger Slides: Grab the plunger and see if there's a ton of "slop" or play. If it's rattling around too much, it won't cut the hay cleanly, and you'll end up with "banana bales" (bales that curve because one side is tighter than the other).
- Listen to it Run: If the seller is willing, have them hook it up to a tractor and turn it over. You want to hear a steady, rhythmic thud. Any grinding, high-pitched squealing, or irregular banging is a red flag.
- The Pickup: Make sure the tines aren't all bent or missing. Replacing them isn't the end of the world, but it's a tedious job that you'll want to account for in the price.
The Nostalgia Factor
There's something undeniably cool about the New Holland model 66 baler. It represents an era when things were built to last a lifetime. When you see that iconic red and yellow paint job (though many have faded to a dull orange over the decades), it reminds you of a time when farming was a bit slower and perhaps a bit more connected.
I've talked to guys who remember their dads buying a 66 brand new. They talk about it with a kind of reverence. For a lot of farm kids, the 66 was the first "big" machine they were allowed to operate. It's part of the family history for a lot of people in the Midwest and beyond.
Final Thoughts on the Model 66
At the end of the day, the New Holland model 66 baler isn't for everyone. If you're running a massive commercial operation, you're obviously going to want something faster, wider, and more automated. But for the rest of us—the weekend warriors, the small-farm owners, and the vintage machinery enthusiasts—it's a legend for a reason.
It's a machine with soul. It requires you to listen to it, to grease it, and to understand its quirks. In return, it gives you neat, tight squares of hay and the satisfaction of knowing you're using a piece of history. It might be old, it might be a bit loud, and it might make you swear every now and then when the twine snaps, but the New Holland model 66 baler is a classic that isn't going away anytime soon.
So, if you happen to see one sitting in a fencerow, don't just see it as scrap metal. See it as the machine that helped build the modern farm. And hey, if the price is right, maybe bring it home. With a little oil and some TLC, it might just have another few thousand bales left in it.