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What is the difference between the 646 and 446 tractors?

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#1 Doug E. OFFLINE  

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Posted February 16, 2017 - 01:00 PM



I know nothing about the Case line up of tractors.  It appears that the 442,444, and 446 are much the same tractors except for engine differences, and I'm guessing the 646 and 648 are also basically the same with different engines.  If I am correct in these commonality of models, what are the differences between these two classes of models? 


My background is Bolens tractors with Eaton or Sundstrand hydro trannys.  What do these Case tractors have? 





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#2 boyscout862 ONLINE  

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Posted February 16, 2017 - 02:14 PM

I have 3 - 200 series Case GTs. They are good tractors but the hydro is lever controlled. The 400 series are bigger than my 200s. The 600 series, I believe are even bigger and stronger. Check the Manuals Sections for the specs. I've seen a 646 with an FEL and a backhoe. Good Luck, Rick

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#3 Gtractor ONLINE  


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Posted February 16, 2017 - 02:39 PM

600 series were built specifically for loader use.  The front hubs and axle are heavier,  the loader mounts right to the dash tower instead of having a different framework under the tractors frame.  Totally different machine.  Some minor parts will interchange but not much.

Edited by Gtractor, February 16, 2017 - 02:39 PM.

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#4 ssmewing OFFLINE  

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Posted February 16, 2017 - 03:19 PM

The 200 and 400 use the same parts with the biggest difference the axles being 5 bolt and 6 bolt. The other difference is the speed of the drive motor for the transaxle.
The 646 and 644 did not have standard power steering. The 648 does have standard power steering. The front axle assembly is about twice as strong as the mowers.
The rear axle assembly, minus the drive motor swaps among all the tractors. The axles are all the same except for the number of bolts for the rim.

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#5 Case-Closed OFFLINE  

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Posted February 26, 2017 - 12:42 PM

As they say, a picture speaks a thousand words.

IMG_0794.JPG IMG_0854.JPG


The 444 with the Allis loader was a somewhat capable machine and I used it  primarily for yard work and snow removal. The loader was a bit long for the tractor and even with a heavy counterweight could only lift a few hundred pounds safely.


I have since moved away from the 444 and into a couple of 646's and I have to say there is no comparison between the two. I recently cleaned out two storage units for the company I work for and was shocked by what can be lifted by the 646. Most every thing in the storage units was old broadcast gear including old three phase transformers. The heaviest transformer put on the scale of the scrap yard weighed in at 1066 lbs. I knew it was heavy when I picked it but was shocked when it hit the scale. When we first started the clean out project some of my peers laughed at the size of the 646 but that all ended when they discovered she was a real workhorse.

Edited by Case-Closed, February 26, 2017 - 11:21 PM.

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