1969 Ford 4000 3 point

I have category 2 on my 3 point. But my lift arm assembly is cat 1. Could I use cat two. The cat 2s are for the 5000 I yet to find them for a 4000. Problem is I keep bending it breaking my cat 1 level arm on the right side pushing backwards with my box blade.
 
Replacing Cat 1 with Cat 2 arms might work, but the next weakest component will then break. If pushing snow, put a plastic pipe over the edge to reduce snagging, and avoid soild objects. Once bent, metal will bend easily even if straightened. Jim
 
Ford put two different styles of lift arms on the 3 cylinder 4000 chassis tractors.
Most of the US built all purpose/ag models came with what I call the crab claw style. These were very heavily built. First photo.
On the Antwerp and Basildon built tractors and the US built Industrial models you will more often see a Much lighter style lift arms which are just straight. Second photo.
Both styles have changeable balls so you can run either cat I or cat II implements.
If you have the lighter style you might swap them out for the crab claw style.
If you are bending the crab claw style you are abusing the heck out of your tractor and definately need to follow Janicholson's advice.

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Okay I do have the crab claw. But thats not what Im talking about. Thought these were called lift arm assembly. These will either bend or break.
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I had both a 65 and a 68 4000(4100) and lift arms were same as the 68 5000(5100). No way would any of those tractors have enough power to bend one of them. had heavy lift arms that you coupd pop out the cat 1 ball and pop in a cat 2 ball. Only the 4100 and 4200 models around here all the large wheels. And every tractor I ever saw had the same arms.
 
Leroy,
I am not as familiar with the 5000 tractors but will lay pretty hefty odds that the 5000 has substantially heavier lift arms than a 4000 does. Some other Ford man will likely weigh in who knows for sure.
Justin,
When comparing photos it's better to take the same angle photo as the other guy did. In this case from the side.
Looks like you have crab claws tho.
In which case I would lighten up a bit.
I had a junk 4000 here that I couldn't get that lower pin out to remove the lift arms.
Took an 8 lb sledge to slug the pin out and broke one of the ears off the trumpet.
They are just cast iron after all and cast doesn't like shock real well.
Not a big deal in my case as I was just going to use the trumpet as a pedestal for my grinder anyway so I cut both ears off the same.


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Okay here is what Im wanting to find out I got it high lighted. How can I keep from bending these. The shaft really doesnt have the strength.
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The 5000's lift arms are somewhat thicker than the crab claw 4000's... and more importantly, they are longer.
 
(quoted from post at 17:35:58 12/14/21) The 5000's lift arms are somewhat thicker than the crab claw 4000's... and more importantly, they are longer.

Another question. Do they make quick connect for the crab claw
 
The factory stabilizer bars fit all three tractors the same, no difference in length. And you could not see where the 5000 was any heavier than the 4000 ones. Just that the stabilizer brackets bolted to the axle different. Any tractors I have ever seen in the models that I had all were made exactly the same. NOW the 4000SU might be different but none of them around here.
 

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