Loosening seized bolts

[Fendt516profi]

How will a grinder help? I can cut the heads off the bolts or slice in between the two parts. Neither will loosen the seized threads inside.

Ahhh I thought they were nut and bolt didn't realize that they screwed into a threaded bit of the hitch

 

[Flatlander]

If it will fit in your freezer put it in there over night and get it chilled down low. Then run to the workshop where your gas bottles are waiting and heat the lower section as fast as possible while your strongest friend hit it with a large impact. The temperatures difference might make the difference. Failing that heat it cherry red and leave it to cool slowly.

 

[Ffermer Bach]

I have also found heating and quenching can crack the seized parts, but I would be inclined to heat and use an impact wrench

 

[Dry Rot]

Plusgas every day, alternate heat and cold, and continue to use it. The vibration/movement will loosen it up over time. It's been like that for decades, give it time. No extreme treatment. Harry Ferguson knew what he was doing.

 

[Nearly]

Put it in a bucket of diesel overnight

@masseybreaker on standby?

 

[Courier]

Will heating the threaded drawbar to cherry red weaken it (lose it's temper) ?

 

[Kiwi Pete]

Inductive heating, maybe? Only had to do it once or twice, best gadget I ever shouted myself

 

[masseybreaker]

weld it together its a fine thread and what ever you do you will f-ck the thread

 

[Courier]

Put it in a bucket of diesel overnight

If you are in no rush make that a month...........

 

[ridger]

weld it together its a fine thread and what ever you do you will f-ck the thread

This thread or the drawbars thread

 

[gadzooks]

Winkle out the rust with electricity? Worth a try if no access to decent heat

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(Link above does it very well with loads of decent new equipment, it works equally well rigged up in hick fashion with whatever bits and bobs you can find as long as you use the correct materials (washing soda / ordinary scrap mild steel)

Probably worth soaking it with spray on 'Gunk' first and maybe adding a bit of non foaming detergent to the soda crystals solution to assist the electrolyte getting in between the threads.

Leave it in the tank & switched on for a week. Occasionally tap the bolts with a hammer.

Used this method on some Toyota MR2 Mk1b brake calipers a few years ago & it's pretty effective

Id try oxy torch first though for speed. Maybe even a longish time with a good blowlamp might help

 

[startinghandle]

[QUO

weld it together its a fine thread and what ever you do you will f-ck the thread

you know your stuff .. but can hardened steel be welded satisfactory?
Are the bolt holes right through?

 

[Hilly]

nothing beats bottles

 

[DrWazzock]

Use it as it is but keep slapping plenty of diesel round it. .Sometimes the vibration of use helps slacken it.
Is the piece it bolts into a casting or a forging? I can’t remember. If it’s a forging, slide the drawbar out lay it on its side flat down on an anvil. Hammer the flat sides of the clevis piece hard against the anvil so it increases their length by a thou or two thereby slackening the threaded holes. Give it several very heavy blows then turn it over and do the other side. Don’t use a toffee hammer and make it look a mess. You need a sledge hammer and an assistant. The vibration will also help. Wear goggles and gloves.

 

[Wisconsonian]

Soak it in soapy water overnight, then hit it with an impact both ways to get it loose before taking the bolts out.

If the bolts break off, weld a nut to the broken bolt, let it cool, and the bolt will probably come out easy.

 

[AJR75]

It's a lost cause I'm afraid and you should consider chopping the tractor in for a brand new, top of the range 300Hp++ Fendt/ JD/ New Holland.....

Joking aside... as others have said, the quickest method is to get the part with the threads in it hot, failing that it's a long old process of penetrating oil etc etc or just use as is- suspect the bolt shank/ holes have worn and after all that effort of getting the thing apart, you'll do it up tight only to find that it's back loose in a couple of hours.

 

[evdama]

Patience- cycled with heating ,cooling,rotational shock both ways,and penetration fluid.
Takes a week or so with one or two quick goes a day.
Done this countless times with horticulture machinery.

 

[Mc115reed]

I mean call me thick but surely the easiest option is too put the hitch on the tractor and lock the hitch up..... get a 3/4 inch drive socket (not a multispline) and bar.... then the heaviest thickest longest scaffold bar you can and turn them off easy.... if it still won’t budge get the loader and push the bar round with the loader...

 

[Netherfield]

And then when you've fecked your best 3/4 bar apply some heat and try again.

 

[agrimax]

And ring them off and he's worse off then...