Backhoe Backhoe Pin Wear

[wallace]

One other thought for ya.....If you can get the lower pin out stick a rod up through it and put a bottle jack on the rod and jack it up..even if you have to leave pressure on it over night with PB blaster soaking it.
I have found better stuff than PB Blaster.
It is called FLUID FILM.
By the way what model backhoe are you working on?

 

[mx5guy]

I have a Kioti backhoe and from description of this problem I seem to have same upper zerk is real hard to grease, have to manipulate arm side to side, apply down pressure to get it greased, could the zerk be a problem?

 

[JoelD]

Rick gave an excellent idea with the pin and bottle jack.

From experience with lots of stuck stuff, nothing seems to work as well as a strong sledge and a bunch of swinging and swearing and swinging and panting and swinging and some more swearing and then a little more swearing for good measure.

I've wailed on some brake rotors and drums and hammered the weeee out of my pickle fork, but in the end, most things will come loose.

A picture of the stuck pin would be helpful.

I've heard of portable hydraulic type presses for dozer track pins and the like, one of those would be helpful in a situation like this. I wonder if you could rig something up with a bottle jack and thick steel???

Joel

 

[IslandTractor]

From experience with lots of stuck stuff, nothing seems to work as well as a strong sledge and a bunch of swinging and swearing and swinging and panting and swinging and some more swearing and then a little more swearing for good measure.

Been there done that. One caveat, if possible protect the end of the pin that contains the zerk. I mashed one of my BH bucket pins with a sledge trying to get it in or ?out and mushroomed the end just enough that the grease nipple would no longer fit into the zerk recess. I just used a die grinder to widen it but it would have been better to use a wooden block to protect that vulnerable spot while I was whammin and bammin.

 

[BXTotal]

Thanks for all the great ideas.

I had the same thought about the bottle jack. I will give this a try. I am pretty nervous about whaling on the pin with a hammer. The actuating cylinder are so close. Sooner or later I would take one out.

The top of the pin is exposed enough to get a pipe wrench on it. What do folks think about trying to twist it out ? The risk here is that the pipe wrench will deform the protruding part of the pin. On the plus side, not likely to damage the flange.

I also wondered about using a short hydraulic ram resting on the lower flange driving up against the upper pin. This would allow me to apply more force than the weight of the tractor would allow at the risk of bending a flange.

For those that have asked, the backhoe is a KB2365. The manual shows the pin as PN BH09-0113. Two versions are shown. One is 38mm dia & 96mm long. At some point, the length was changed to 108mm long.

Any thoughts on why the lower pin has no exit hole for grease ?

 

[IslandTractor]

Rick is very familiar with the KB2365.

I owned one and never had trouble with any of the zerks not taking grease. I have to assume there is some problem with the pins you have but Rick would be better to give you a definitive answer.

 

[JoelD]

Don't forget eye protection when hammering on steel with steel.

I see no problem with the pipe wrench and a twist would probably do wonders. You'll be replacing the pin so who cares about hurting it.

I replace my pins at intervals as a maintenance item, I've got new pins in the basement.

If you twist it out you can always find something else to beat the snot out of with a hammer.

Good luck.

Pictures please if you can.

Joel

 

[wade simpson]

I repair submarines in my day job. If it is possible I would try to drill the center of the pin out with the biggest bit I could use(start small). I have seen pins frozen (welded) by rust expansion almost fall out when the center was drilled out. If that doesn't get the pin moving at least you can start dremelling the pin away from the inside until there is almost nothing left. Hammers are great tools but they can really mess up a job like this, if used at the wrong time. Heat is any mechanix best friend but it can seriously weaken steel if it gets too hot.

Good luck

 

[JoelD]

I repair submarines in my day job. If it is possible I would try to drill the center of the pin out with the biggest bit I could use(start small). I have seen pins frozen (welded) by rust expansion almost fall out when the center was drilled out. If that doesn't get the pin moving at least you can start dremelling the pin away from the inside until there is almost nothing left. Hammers are great tools but they can really mess up a job like this, if used at the wrong time. Heat is any mechanix best friend but it can seriously weaken steel if it gets too hot.

Good luck

Excellent points, particularly on the heat, easy to forget the number it can do on metal.

Joel

 

[Reg]

SOMETIMES you just can't get a good enough swing at it, but you have good access from the head end.
If this is the case weld a 5/8 fine thread bolt on it head to head, then thread the slide hammer onto that bolt and SUCK it out.

My slide hammer bits are all 5/8 fine, I think most are, but use whatever thread standard your slide hammer uses