siezed bucket pin

[guswa]

heres a couple of photo of a pin that i am starting to dislike with a passion:Banghead its had heat ,sledge hammer,20ton pressure and still nothing i gotta feeling its going to get the guts cut out of it hehe.

 

[HarrellBrawner]

it looks like the end you are driving from has [mushroomed]. put a rose bud on this end, get it good and soft. It should reform back to the original O.D. Try to direct all the heat to the pin it self.

 

[joispoi]

Have you soaked it with penetrating oil?

If the end of the pin is not mushroomed, try welding a nut to it - no larger than the pin diameter- and give it hell with a 16 lb sledge.

Another option is to cut the tab that holds it from turning in place and weld a 3-4 foot section of scrap square tube or pipe to it. Get in the seat an plant the end of the bar that you welded to it in the ground then work the dipper back and forth until the pin breaks loose.

If you have a mini with a breaker, you could punch it out without breaking a sweat.

 

[willie59]

I kinda agree with joispoi, pin is probably trash now anyway, cut that retainer plate off opposite end, weld a nut smaller in dia than pin and try knocking it back opposite direction.

 

[RayF]

How loose is the pin in the dogbone bearing? They often hang up on a wear step. You maybe able to jiggle it to the right spot. Other wise what Willie said. Failing that a lance is quick and easy but make sure the operater knows what he's doing otherwise you will be making a line borer rich.

 

[guswa]

Making progress, that one pin is still to come.The dog bone is as loose as,you can slide it from side to side no problems,I reckon your right there is a ridge on the pin and it is a matter of finding that sweet spot.

 

[sheepfoot]

guswa, I sometimes use my 14" partner saw to cut down each side when their is enough room between the part and frame, then you can put it in a press and take the bushing and pin out at the same time and also the other pin peices can be blown out, some 7-9" side grinders will take the cut off blades if you have the adapters but you have to be carefull because you have to take the guard off, is that a 621 loader.

 

[absoluteequipme]

hmmmmm...... I love my exotherm lance , or a burning bar for these situtions.
up until I used one , always used the " heat and beat " method......... $40-$70 worth of lance rod and 30 minutes now. I only sweat from the back blast now . Thanks to the guys that showed me those toys.:notworthy

 

[absoluteequipme]

I've also had luck welding a mfg. " C " frame to the outer dia. , then a couple rose buds and a big porta power ........

 

[caterpillarmech]

Agreed, Air arc is the way to go. Just keep your rod in control or you will building up the EXTRA you cut out.

 

[guswa]

Finally had a win, gouged the end of the pins out and applyed hydrlic force one end and gave it a working over with tha sledgey at the other.

 

[Reel hip]

Finally had a win, gouged the end of the pins out and applyed hydrlic force one end and gave it a working over with tha sledgey at the other.

Glad you got it! Sometimes when something this hard happens there is satisfaction knowing that you won!

 

[guswa]

Glad you got it! Sometimes when something this hard happens there is satisfaction knowing that you won!

Yep was a relief to see the pin come out as this is not really my line of work but have picked up heaps of tips off this web site, my bother inlaws gas axe worked a treat and i made shaw when i was cutting into the pin that i stayed away from the gussit holes.Dont want to give those line borers any work as the pins and bushes are going cost me a heap.

Nar sheepfoot its not a 621 its a 380-1 komastsu.

anyway four pins out five to go,now weres that gas axe.:cool2

 

[guswa]

had to cut another pin out today,thankfully the others come out with ease.

 

[quantum500]

There is another trick that works well that I havent seen mentioned. A sawzall usually will fit between the bushings and cut the pin. Once you break it into three pieces it comes out much easier. I'm still thinking about buying a magnetic drill and a 100 ton hollow shaft puller. One thing about pulling is you can whack the back side of the pin with a big sledge and quadruple the force. The amount of energy available in a well swung hammer is huge but brief, so it's easy to lose that energy from the lack of a solid impact. With a puller attached it tends to solid things up pretty well. Another thing to keep in mind is to make sure you never mushroom the pin from directly hitting it. The best way that I have found to do that and still transfer good force is weld a nut on the pin then put a bolt in the nut 7/8 or bigger recommended. I have a special hammer that gets taken out on these special occasions. It's an old kill hammer I believe that weighs 20lbs or better and it has a piece of pipe welded on for a handle. It is a mean bitting SOB. If you can swing it three times without making yourself cry you aren't swinging hard enough.

 

[Nige]

Thermic lance ........... works every time ......!!

 

[trevor b]

look's like a case of too mutch grease !!!! (left in the gun ) tb

 

[guswa]

a couple of progression photos

 

[DirtHauler]

Thanks for the update!

 

[JDOFMEMI]

It is looking good. I bet it is like new when you are finished.