Tractor Category 1 2 3 Hitch sizes Defined: Operating and Attachments  -- General Tractor Discussions Discussion Forum and Review Tractor Category 1 2 3 Hitch sizes Defined: Operating and Attachments -- General Tractor Discussions Discussion Forum

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 09-18-2012, 16:45 Post: 184944
skipll



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 Tractor Category 1 2 3 Hitch sizes Defined

Can someone please explain the difference between a cat 1 & cat 2 hitch.
THANKS






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 09-18-2012, 22:11 Post: 184946
candoarms



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 Tractor Category 1 2 3 Hitch sizes Defined

SkipII,

The 3-point hitch comes in 5 different sizes, numbered from Zero (0) to Four (4). The only differences between them are the dimensions of the triangle and the diameter of the three connecting pins.

The lower lift arms on a three point cat 1 hitch are 26 inches wide, with the top link being 18 inches above the center line, between the two lower lift arms. The lower lift pins are 7/8" in diameter, and the top link connecting pin is 3/4" in diameter. The cat 1 hitch is used on tractors from 20-45 horses.

A cat II hitch is 32 inches wide. I believe the top link is located 24" above the center line between the two lower lift pins, but don't quote me on that one. The lower lift pins are 1-1/8" inch in diameter. The top link connecting pin is 1 inch in diameter. The larger CatII hitch is designed for use with tractors ranging from 40-100 horses.

The largest CatIV hitch is MUCH bigger, with a 46" width, 2" lower lift pins, and is rated for tractors ranging from 180-400 horses.

Hope this helps.

Joel






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 09-19-2012, 06:06 Post: 184947
skipll



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 Tractor Category 1 2 3 Hitch sizes Defined

Thanks for that info candoarms-----I had no idea that there were diff. size hitch's till I read the post by dnsmithnc (post 153609).






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 09-19-2012, 07:25 Post: 184948
candoarms



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 Tractor Category 1 2 3 Hitch sizes Defined

SkipII,

You may have noticed that there is a small overlapping of horsepower ratings between the different hitch sizes. It is for this reason that many implements are designed for use with either a Cat 1 or Cat II hitch.

Bushings are used over the lift pins on a Cat 1 implement in order to make it possible to use them with Cat II hitches.

I've never seen a Cat IV hitch in person, but many of the farm tractors in my area use the Cat III hitch. These larger hitches are used with row-crop cultivators (Beans and Corn), making it possible to raise the implement at the end of the field, allowing for a much smaller turning radius. The lifting capacity of the Cat III hitch is pretty impressive, as a 16 row cultivator is a very heavy implement.

Joel






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 09-22-2012, 07:27 Post: 184985
Art White



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 Tractor Category 1 2 3 Hitch sizes Defined


The three point hitch option on the larger tractors we sell are about the same price as many of the smaller compact tractors we sell!
The bulk of attachments for the larger tractors are tow behind not three point hitch. Most of the equipment used with the larger farm tractors is towed.






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 09-25-2012, 18:33 Post: 185010
kthompson



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 Tractor Category 1 2 3 Hitch sizes Defined

One thing I have noticed as the hitch size increases normally you find more options in lift arms such as telescoping arms or more quick hitch options. Makes since for while you may move a light landscape rake in Cat 1 size that 1,000 plus piece different story.






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 04-03-2014, 22:05 Post: 189912
JParker

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 Tractor Category 1 2 3 Hitch sizes Defined

I have a 2003 Kubota B7800 (Cat 1 hitch). A probably around 2005 I bought a 4' King Kutter II tiller and a sub-soiler. With the hitch pins points outward, they require the lower arms to spread 33.25" which wasn't a problem. A friend needed my tiller more than I did, so I sold it to him. He has a 2013 Kubota L3200, a little bigger & heavier than the B7800. When we went to hitch it up, the lower arms wouldn't spread far enough to hitch with the points out, so we had to flip them. This article lists the official dimensions of a cat 1 hitch as 26" wide.

My sub-soiler measures 32.5" tip to tip with points out, and he wants to borrow it. The design doesn't allow it to be switched to "points in".

Have 3 point implement widths or tractor lower arm maximum widths changed in the last 10 years?

Does anyone know the "specified" maximum width of lower arms on a L3200?

I know I usually see implements on the dealer lot with points in, but assumed that was for safety walking around them, and to save space for shipping. Are implements usually used points in or points out?






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 04-04-2014, 07:53 Post: 189913
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 Tractor Category 1 2 3 Hitch sizes Defined

My guess is there is issue with the stabilizers either one or both. I would be sure he has both released for full swing of the lift arms. I do not know the type of stabilizers on that tractor but if the telescoping style on my two Kubota's there could be one is bent or a bolt or such in one that limits it full travel. kt






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 04-04-2014, 10:04 Post: 189918
candoarms



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 Tractor Category 1 2 3 Hitch sizes Defined

JParker,

The lower lift arms on the L3200 should easily spread wide enough to make contact with the rear tires.

As Kthompson pointed out, the inner stabilizer arms are more than likely preventing the lower lift arms from spreading to the maximum width.

Hope this helps.

Joel






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 04-07-2014, 19:06 Post: 189985
JParker

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 Tractor Category 1 2 3 Hitch sizes Defined

Thanks for the input.

I went over to friends house Saturday and we got everything hooked up & tilled, but the L3200 definitely can't spread the lower arms as far as the B7800 series. This L3200 has telescoping stabilizers that hit the tire long before the lower arms would. The B series has the turn-buckle style stabilizers, and I think they are mounted closer to the main body, thus reducing the tire interference. This machine also has a backhoe bracket that may have something to do with the connection point location. I added photo 10 in my profile showing the connections. I recommended he replace the standard cotter pin with a pull pin, so the stabilizer can be temporarily removed if necessary for attaching an implement. We also discussed some quick attachment options since that should save about 7" in width, not having to go outside the ends of the pins.






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Discussion Boards > Active Subjects > Messages as Posted > Operating and Attachments Forum

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