Forum › Forums › Tractor Operation And Maintenance › koyker 140
- This topic has 22 replies, 4 voices, and was last updated 6 years, 6 months ago by Bob Rooks.
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May 8, 2018 at 5:30 pm #47855
Brought the Jinma home for service and wanted to remove the front end loader, it appears the pins secured by 3/4 in bolts in loader mount are rusted frozen. No amount of penetrating lubricant and banging seems to help. Any suggestions.
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May 9, 2018 at 6:46 am #47857
well there is heat or a long wrench (I use a 600 lbs. 3/4 drive torque wrench it is like over 3 ft. long) what is good about the torque wrench is you can monitor how much force you are putting on the bolt by setting the clicker. Or the old heavy duty impact wrench and hope you do not twist them off. One good thing if they are holding the loader on they should be a hardened bolt .
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May 9, 2018 at 7:32 am #47858
Sorry was not clear enough, it is the pins that are stuck. I got the nuts off the bolts easy but cant drive the pins out
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May 9, 2018 at 8:43 am #47859
ok try to get any load off the pins that you can and heat still can be used and is there enough room and is there something you can hook a 2 jaw gear puller on and use it to push the pins out? Does the joints that the pins are in have grease fittings ? there are tools that force oil thru grease fittings to loosen them up when the grease gets hard so new grease can be added. How many pins are stuck and where are they on the loader?
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May 9, 2018 at 5:16 pm #47860
attached is pic of the problem, 3/4 bolt locks the pin in the bracket. Cannot for the life of me get the pin out.
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May 9, 2018 at 5:26 pm #47861
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May 9, 2018 at 6:19 pm #47863
I am assuming that you are writing about the golden looking pin, how about welding on a eyelet on it putting a hydraulic puller or a cable come along on it. Go to something that will not move with the puller, jam the bucket in the ground set the brake do whatever it takes to get the tractor where it will not move. Tension the pullers as much as you can then heat and beat the pin . A impact hammer might help if you can come up with one. I once pulled off a frozen axle bearing with a backhoe, sometimes you just gotta do things that aint normal.
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May 9, 2018 at 7:20 pm #47864
Like David said earlier, you MUST have ALL the load OFF the pins. If you are sure there is no load on the pins, try an inertia puller (slide hammer). Do you have the loader frame blocked and supported?
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May 10, 2018 at 1:41 am #47866
” try an inertia puller (slide hammer)”. Dang. Been using those for almost 50 years (even moved frame rails on a VW Rabbit with a ten pounder) but never heard the term “inertia puller” B-)
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May 10, 2018 at 7:43 am #47867
There is no stress or load on the pin. The bolt pin combo rattle freely in the bracket. Problem appears to be fusion of the pin inside the head of the bolt. I will explore suggestions.
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May 10, 2018 at 7:53 am #47868
Question about applying heat. The problem area is smack in the middle of the loader bracket. The pin courses through the bolt head. Would I not want to heat the bolt to try and expand it rather than heat the pin?
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May 10, 2018 at 2:00 pm #47869
” try an inertia puller (slide hammer)”. Dang. Been using those for almost 50 years (even moved frame rails on a VW Rabbit with a ten pounder) but never heard the term “inertia puller”
Hahahaha. That is the generic term for that type of tool because that is the type of force being applied. You are used to the colloquial term. I guess I’m just a generic type of guy. :wacko:
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May 10, 2018 at 2:06 pm #47870
Question about applying heat. The problem area is smack in the middle of the loader bracket. The pin courses through the bolt head. Would I not want to heat the bolt to try and expand it rather than heat the pin?
I think I’m getting a better mental picture of it now. The pin actually passes through the bolt head, which is threaded into some other part. No? Have you tried turning the bolt head to relieve the load on the pin?
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May 11, 2018 at 7:47 am #47875
Yes the bolt is captured in the frame of the loader which then slides into the mount attached to the tractor. The pin courses thru both and the bolt head, when the nut is tightened it stress the pin securing it in place. There is currently no tension anywhere in the construct, simply just cannot get the pin to slide out of the bolt head, which I can barely see as it is smack in the middle of the whole apparatus. Additionally the pin is pulled out from the inside (towards the engine) so to use some sort of puller I would have to cut the head of the pin off and possibly render the system in usable if I could not finish the job. So at this point more penetrant, and then heating the treads of the bolt you can see in the picture to try and expand the head some, followed by vigorous pounding with a sledge.
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May 11, 2018 at 3:13 pm #47876
Heat and pounding worked, did bugger the 3/4 threads on one side hopefully can clean up with a die
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May 11, 2018 at 6:31 pm #47877
if you need to before you try a die hit the first thread with a triangular file to give the die a place to start.. and good going on getting it loose.
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May 14, 2018 at 6:22 am #47881
should have wrote earlier that grease would be ok in that joint but never seize would be best so this should not happen again.
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May 14, 2018 at 8:29 am #47882
Thanks I am a frequent and liberal user of anti seize, but do find it lacking in situations like this pin. Constantly exposed to the elements the duration of effectiveness seems diminished. Is there a product more specifically suited for this situation?
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May 14, 2018 at 11:40 am #47884
Is there a product more specifically suited for this situation?
Yes.
http://www.cosmolinedirect.com/cosmoline-weathershed-industrial-grade-spray/
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May 15, 2018 at 6:21 am #47887
you might want to try a aerosol can of dry graphite(not messy) or fifth wheel grease(messy but should hold up)
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May 15, 2018 at 7:37 am #47890
Is there a product more specifically suited for this situation?
Yes. http://www.cosmolinedirect.com/cosmoline-weathershed-industrial-grade-spray/
I’ve had a lifetime of that stuff all over me and my clothes working almost excursively at General Motors dealerships. Their frames and sub-frames are dipped in it, and it’s mixed with black carbon to give it that “black framerail” look.
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May 15, 2018 at 7:41 am #47891
Cosmoline.com who would have ever thought.
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May 15, 2018 at 8:51 am #47892
Is there a product more specifically suited for this situation?
Yes. http://www.cosmolinedirect.com/cosmoline-weathershed-industrial-grade-spray/
I’ve had a lifetime of that stuff all over me and my clothes working almost excursively at General Motors dealerships. Their frames and sub-frames are dipped in it, and it’s mixed with black carbon to give it that “black framerail” look.
You are not alone. Hahahaha. International trucks must have used the same stuff. I also worked for a shop that rebuilt and sold WWll army tank and truck components. Cosmoline was EVERYWHERE!
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