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seized up pin

Hoerider11

New Member
Joined
Jan 21, 2020
Messages
2
Location
Los Angeles
Hi all.
580l backhoe, Need to remove the extendehoe cylinder, to repack. The pin on the lower bucket end is seized up, no movement what so ever after several hits of a sledge hammer. Dont want to mushroom the head, any ideas?
 

Delmer

Senior Member
Joined
Jan 3, 2013
Messages
8,865
Location
WI
Could try building a frame and pushing it out with a hydraulic jack. I assume this is a pin for a cylinder inside of the boom, virtually no access? Let us know how it goes and if you need any more ideas. Post a pic for best service.
 

Hoerider11

New Member
Joined
Jan 21, 2020
Messages
2
Location
Los Angeles
Yes Delmer, its the pin that goes thru the cylinder rod end of the extension inside the dipper stick. There are no grease zirks for the part that goes thru, and on the inside i would have thought it would be well lubricated. Any way I will be taking it to the dealer tomorrow. Iam sure they have their methods and I will pay for it dearly.
 

Theweldor

Senior Member
Joined
Feb 17, 2018
Messages
556
Location
Western, NY
Occupation
The Village Idiot
Hi all.
580l backhoe, Need to remove the extendehoe cylinder, to repack. The pin on the lower bucket end is seized up, no movement what so ever after several hits of a sledge hammer. Dont want to mushroom the head, any ideas?




To late for the mushroom part.
 

old and slow

Active Member
Joined
May 31, 2019
Messages
40
Location
Satellite beach
See if you can find somebody with a carbon arc torch, it is not real common, but works well for this. you gauge a hole all the way thru the pin, by the time you finish it is so hot you can drive it out. The material you gauge out gives the pin room to shrink. If it does not come out hot cool it it with water and it will come out. The carbon arc torch is around 500.00 requires at least 300 amp welder and a air compressor. If you can stick weld you will get the hang off it quick
 

56wrench

Senior Member
Joined
Dec 4, 2016
Messages
2,074
Location
alberta
my favorite tool for pin removal is an exothermic torch made by BROCO. pretty hard to beat for blowing the centre out of any pin. excellent for 2 reasons- it works, and any time somebody was bothering me I would pull it out and everybody would leave me the hell alone after the sparks and slag started flying everywhere:D
 

Blocker in MS

Senior Member
Joined
Nov 5, 2019
Messages
781
Location
Mississippi
^^That is definitely the most assured way to get it out. It is amazing what those things will do. They are just pricey enough that not many people will have one sitting around not used though.
 

Delmer

Senior Member
Joined
Jan 3, 2013
Messages
8,865
Location
WI
Oxygen lance, piece of black iron pipe hooked up to oxygen, start it with a cutting torch and push it through ANYTHING.

I've never had the guts to try it. If I had to, I'd set it up so you could observe from a safe distance and feed the pipe from there.
 

DMiller

Senior Member
Joined
Feb 21, 2010
Messages
16,432
Location
Hermann, Missouri
Occupation
Cheap "old" Geezer
Saw the O2 Lances made up and used at a Steel mill to clean melt pot sides in Alton IL. Used pipe straight out of the mill screwed into a gate valve!!
 

highwayghost

Senior Member
Joined
Nov 1, 2019
Messages
315
Location
Pittsburgh, PA
Occupation
Emissions Analyst
I saw guys at the mill using them. They had on those silver 'spaceman' fire retardant suits similar to what you see scientists wearing around volcanoes. The $hit really flies!
 

Nige

Senior Member
Joined
Jun 22, 2011
Messages
28,979
Location
G..G..G..Granville.........!! Fetch your cloth.
So are you guys telling me there is something better than my oxy/acet torch?
Cat do a nice mini-torch. Useful for all sorts of things, especially D10/D11 equalizer bar centre pins where there is limited space for access.
 

Attachments

  • SEHS8923 - 8T-7792 Mini Torch.pdf
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hosspuller

Senior Member
Joined
Aug 27, 2014
Messages
1,869
Location
North Carolina
Cat do a nice mini-torch. Useful for all sorts of things, especially D10/D11 equalizer bar centre pins where there is limited space for access.
Only need a O2 cylinder and a 12 volt battery. :)..Local price is $600 for the torch... Are the rods available outside of CAT ?
 

Welder Dave

Senior Member
Joined
Oct 11, 2014
Messages
12,259
Location
Canada
Arcair Slice torch is an exothermic torch similar to the Broco torch, Cat mini torch and there are other brands as well that work great for cutting through pins. Unless it's a huge pin on a dragline or something huge probably don't need an oxygen lance. Arcair air arc gouging torches are very common but not the best for removing a pin. You have to be too close and all the sparks and slag would be blowing in your face. You also need a good welder and air compressor. An exothermic torch can be run off a 12 volt battery or a welder.



 
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