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Show Parts for Model:

Replacing 821 lower lift arm pin

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Author  [Modern View]

03-06-2018 05:56:42

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My 821 backhoe had a sub-frame that mounted at

several points including the lower lift arm pins.

I did not plan on using the FEL and Hoe anymore, and

since the 821 came without a 3 point I wound up cutting

the one pin with a cut off saw. I left about 11/4 "


Now I am installing the hydraulics and I would

like to replace the PIN. No luck budging it with large jawed pipe
wrench. What options do I have?

Further damage whats left and weld a large NUT on the end?

Don't think heat will work? will it?

Weld 1 1/2 sleeve for the larger cat lift arm, and change ball on original arm?

Cut "V" and butt weld new style lift pin, since I still have 1"

left most stress will be carried to the old pin.


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03-07-2018 03:44:10

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 Re: Replacing 821 lower lift arm pin in reply to corvetttteguy, 03-06-2018 05:56:42  

That is a good consideration.

I'll try to schedule it in when winter finally lets go.

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03-06-2018 08:53:33

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 Re: Replacing 821 lower lift arm pin in reply to corvetttteguy, 03-06-2018 05:56:42  
Quoting Removed, click Modern View to see

Since that is the last thing I want to do my only

option working from the outside is to but weld
a TSC lower lift pin on the end of my cut - off

lift pin and count on the strength of the remaining

pin to hold the 3 point in place.

I can always take apart the rear end in the future

should the need arise.

Thanks for the info. I thought the pin just

screwed into a set of casting threads. [img]

What is left

Sleeve to use a guide to true end for welding [img] /photos/12301.jpg[/img]

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Greg NE

03-06-2018 17:00:19

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 Re: Replacing 821 lower lift arm pin in reply to corvetttteguy, 03-06-2018 08:53:33  
Pulling the trumpet is not that hard, especially if you have a hoist like a cherry picker for pulling engines. Remove the tire, pull the brake linkage pin, drain the rear end and one gasket to buy. I would be really worried about that welded pin breaking when you're using the three point and the implement your using getting caught on the tire and pulling it up on top of you. That can happen in a split second and may not end well for the driver in the seat! Not trying to preach, just don't want to hear about another bad accident. Just my opinion, Greg NE

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Ultradog MN

03-06-2018 07:36:09

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 Re: Replacing 821 lower lift arm pin in reply to corvetttteguy, 03-06-2018 05:56:42  
You'll have to pull the trumpet. There is a large castelated nut - with cotter pin, on the inside. I doubt you'll get the old one out any other way.

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