The Craftmans Shop > New from Old
Resurrection of a CFEI 100 KVA Induction Furnace
djc:
--- Quote from: Pete. on April 13, 2020, 12:38:46 PM ---What I would do is measure the hole diameter in the key slots. Get a bolt about 150mm long with a shank that fits closely in the hole and cut the sides off the head so it can drop in and turn through 90 deg. Get a piece of box section steel maybe 6 foot long and drill it over-sized for the bolt to allow a bit of wiggle. Measure the distance from the key slot to the edge frame and weld a chunk of flat bar on the box section such that the bar acts as a fulcrum bearing on the frame. Now pop the box section over the bolt and run a nut down it, and start bouncing on the far end to lever the cover up.
--- End quote ---
All of the above except the last sentence. Weld two chunks of bar to it so they bear on the projections of the frame on both sides and then use the nuts on the bolts to wind up the cover like a giant bearing puller. Once the bolts are in the cover slots strut them apart with a piece of timber.
Will_D:
Are there any visible signs of weldinding? Or is it just rusted in tights?
Welds should be easily visible!
awemawson:
I'd initially thought that it had been welded, but my various attempts over the last few days to open it have now convinced me it is a combination of tight packed clay and rust .
I suspect these covers fit in a taper fashion - I've been working away at the junction but it's pretty solid. I'd hoped that the Kango treatment would at least have broken the bond, but apparently not.
My fear is that a trimmed bolt head in the slots may end up just pulling some the the cover round the slots out as it'll be exerting far more force than intended. Hence still scratching away at what gap there is.
Pete.:
I have seen covers with burst key holes before Andrew. Usually on private property because a utility would get them changed.
vintageandclassicrepairs:
Hi Andrew,
What about making a fire sat on the lid? the heat would expand the cover more so than the frame
It might be enough to break the joint free
John
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