How did you get the pins out in order to clean them up?
Once I disconnected the levers from the rod, I was able to turn both of the locking pins (wedges). It's been a while since I did this, but after removing enough bolts, I was able to pull the pins up through their attachment mounting frame holes, clean and grease.
It's been long time but still have this problem. I have not had to change attachments so I have not done any more than occasionally drench with PB Blaster but I still have not been able to get the pins out. The dealer told me to bang on the pins from the bottom with a big hammer. I have tried this and also but a piece of scrap flat bar over the bottom of the pin and took an air chisel to it hoping to vibrate it loose but so far no luck. Any suggestions?
Did you remove the bolts on the bobtach that hold the pins in place?
take a small torch to it. if you heat it up some ( im not talking red hot, just some heat to help it move some) you might be able to get it to move. a small mapp or propane tank would work, i do this to old rusted pipe fittings , i heat the fitting then after it cools a bit , i am able to unthread it.
The only bolts I can see are the ones for the handle that are welded to the Bobtach. I have not tried taking of the nuts off the welded bolts that hold the handle on or the roll pins. The dealer told me I would not likely be able to get the roll pins off with the bucket still on.
An air chistle will do little to free the pins. It just doesn't have the force to do much.
I was hoping that the air chisel would vibrate the rust and let the penetrating oil get in a little deeper. Not sure if it did anything at all. I tried heating the pin with a propane torch but that didn't seem to do much either. Just sprayed some more PB on it and figure I'll keep spraying it throughout the week until I run out. I also tried a can of CRC Freeze but that didn't do much either. I really need something solid to hit the bottom of the pin with. I have been using a piece of flat bar stock and a small sledge.
I have had these so tight that the only way to get them out without completely destroying the pins was to use an angle grinder . Slit the bobtach on the front ,from top to bottom (in the middle where the pins are ) and they will knock out without damaging the pins.Then weld up the angle grinder slit.
I actually just shot grease in the fittings. My pins were so tight a sledge hammer would only move them .25 inch or so. I tried heat, and that was what got them to move in the first place. Once I greased them, I worked them for a while, and kept shooting them until the grease was clean coming out.
As long as you can get a small amount of movement, you will get them out. If they move, even just a little you will get grease/oil in to get them free. The hardest part is getting them to start moving!
I can't get grease into the pins and they are not moving when I bang on them. I would be encouraged if I saw some movement. I really don't like the idea of having to split the Bobtach and reweld b/c I currently only have an oxy/acetelyne set up and my welds are pretty ugly. Has anyone tried those light oil injectors that go on the zerk and you hit it with a hammer to inject oil? Northern Tools sells them in their catalog. http://www.northerntool.com/webapp/wcs/stores/servlet/product_6970_200130974_200130974
Personally, I'd braze a hyd fitting to a old grease nipple, make up a hose to your quick couplers and give it some hyd pressure. 2500 psi might do wonders.
It would be nice to hook up the aux couplers to the grease nipples but i really doubt the pressure will be there. Most grease guns can do around 10,000 PSI and our little bobs can only do 2,500-3000 PSI.
Freed at last! I used a giant bold and a sledge hammer to pound out the pins. My brother-in-law helped me pound out the pins. It took a bit of sweat but they now move freely. We pounded for a while and at first it didn't seem to be doing anything but then I noticed that the pin had moved very slightly. I was encouraged and we continued hammering. Sprayed more PB on it as it moved and pumped in some more grease. Hammered the pin back and forth a couple of times and eventually I was able to move it with the handle. Thanks for all the advice and suggestions.
