The Craftmans Shop > New from Old
It's BIG, Yellow and digs holes! JCB 3CX Project 8 is joining the Tractor Shed
vtsteam:
Time, solvent oil, and pressure is a nearly inevitable shifter. Sounds like a plan! :thumbup:
WeldingRod:
Is this the pin that has a locking tab on it? If so, put a jack or a wrench on it and try to turn it! Maybe even while impacting ;-)
Sent from my SM-G715A using Tapatalk
awemawson:
Yes it has a lock tab of reasonably heavy gauge - 3 or 4 mm.
I've tried driving it round with a big adjustable
I've tried driving it round with a punch and lump hammer
I've tried driving it round with a blunt air impact chisel
I've tried getting under it with a sharp cold chisel and lump hammer
I've tried getting under it with a sharp air chisel
I've tried levering it with a crowbar on the one bit where that's possible
. . .all to no avail . . . that pin is REALLY stuck.
But I do agree with the comments regarding heating to red with OA - I'm sure that would work but I'm not doing it for the aforementioned reasons .
But I did make a new slider bar for the slide hammer this afternoon - I didn't like sliding on the 12 mm - threaded bar - plain bar much better engineering even if it had the same lack of result :bang:
RussellT:
Hi Andrew
If you can't heat it up, how about trying to cool the pin. Could you drop some dry ice into the hole you've drilled. I seem to recall you can get dry ice by discharging a CO2 bottle into a cloth bag.
Russell
Edit: On second thoughts trying to fill the hole probably won't do it, but it should be possible to cool the top of the pin.
awemawson:
Russell, I had considered that, or even the freezer spray used for electronics diagnosis, as I have some of that. But the amount that you can get in the hole is pretty minuscule.
I'm sorry to have to confess BUT I've admitted defeat on this one for the time being - it's taken up far too much of my time and at the end of the day the play in the pin is not a big issue. I've filled the hole with penetrating fluid, capped it with a bolt and put everything back together this morning. When and if I have to do the bearings and seals on the near side hub, which is fairly likely as the offside had to be done, I can then apply significantly more heat without risking to much collateral damage.
Meanwhile I'm back in clean clothes for the first time in days, and the jeans are going in the washing machine !
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