pushing pin out on a massey backhoe?.

can the backhoe pin be pushed out from either direction? or will one bushing be tighter?

Hi
I worked on a massey the other week for a guy. as long as the relevant fixing hard ware is removed his could come out either way in theory. The problem we found was one or both sides of the pins was seized in the boss. he had tried beating on them with a 2 lb toffee hammer, then heated them with an industrial sized cutting torch, Not your hand held plumbing type torch. His next mistake. after heating the pin moved about an 1/8 inch with the 2lb hammer and stuck pretty solid as it cooled.

What he should of done was heat and cool the area right down with cold water before moving the pin. Thats an old blacksmith trick I was taught many years ago and works for nuts and bolts and other things to. with the heat still present it caused the shaft to gall( burr) up in the bushing as it moved and cooled. That one I had to beat out with a 14lb sledge hammer and it took about 30 mins hard hitting with a big piece of shaft as a punch and more heat and cool. When it finally came out there was a huge amount of rust on the pins, and you could see the scoring on the pin

The next 1 we took off wouldn't move so we heated both bosses and cooled them right down and started with the penetrating oil it popped out pretty easy. the last one we heated a couple times before it came out that was stuck one side only.

The hard part is you may have only one side or both tight and dont know which on a big boom section. The other thing is you can get a step in the pin where the cylinder sits you may get a bit of movement then the cylinder eye drops in the groove, depending on the way the weight sits then you cant beat the pin from the step until you get it to line up nice.

The one thing you wont want to hear is my buddy rebuilt the boom on his track hoe they had about 30 hours heating cooling, and a custom built hydraulic pin pusher with 100 ton capacity to get one pin out. they can be in that tight and he said when it popped it sounded like a large cannon going off.
If the pins burred from previous attempts you got to get that sorted as well the slightest flare on one or both ends of the pin can kinda rivet them in the bosses to, and make life real fun.
Sorry the post long but that covers prety well what you might find in this project.
Regards Robert

Like Robert said there are right and wrong ways to deal with tight pins,,and to add to his post be sure you keep the punch your using "squared" off good, when they get rounded or sorta pointed they will swell the head of the pin more..a rivet effect happens..

Hi
Just thought to add if your working on a stabilizer leg on a center mount backhoe like the 50 A machine The cylinder end pin on the stabilizer leg had to be knocked out from under the machine. I think its a side plate runs partly down the back side of the hole near the tire, and the pin only comes out that way you cant knock it in forward to the front of the machine. it was a fun job being under there and trying to hit the pin out with a punch in that awkward tight space. luckily on that machine the pin was not seized tight.
Regards Robert

My split bushings, which looked like push pins, were worn badly, they fill out. I used hitch pins instead of spending 5 times the amount for factory pins.