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| Pete.:
Yeah there's nothing more fun than changing freshly-greased pins and bushes :D |
| awemawson:
So today's job was to remove the old bushes from the dipper, along with the 'banana links' and the 'bucket 'H' frame' This is the general arrangement: |
| awemawson:
First job, drop the bucket - then strip everything off |
| awemawson:
So not too bad really just rather mucky. Now that lot were off I could inspect the various bits that wear. The bush location in the end of the dipper arm was worst being somewhat ovaled, as was the rod eye on the bucket ram to a lesser extent. Long term both these will have to come off and (somehow :bugeye: ) got onto the Bridgeport table and bored oversize for bushes to be loctited in, but to keep the job going forwards, for the time being I turned up a bush for the rod eye that largely lost the wear, and used magic on the dipper end :ddb: Magic in this case being Devcon Titanium loaded epoxy putty. The wear bush is a nylon sleeve, the original having completely vanished !. New one was a reasonable fit except for the outer inch or so where it bellmouthed. I pressed the bush in and packed the Devcon around and into the wear cavity, making sure that the grease passage was still free. I very much doubt it'll last long, but the stuff is rated at 105 Mpa compressive force and specified for building up bearing housings so we'll see :scratch: |
| awemawson:
The Devcon has already set rock hard on my 'control sample' that I left on the bench, but I'll still leave it a full 24 hours before I re-swing the bucket. Pressing the second nylon wear bush into the end of the bucket H frame compressed it enough that it would't pass a 35 mm bucket pin :bang: Fortunately I have a 35 mm reamer, albeit on a 4 MT, so I passed that through the bush with a spanner on the tang - it's still very tight but no doubt a bit of use will sort that out :clap: Then after I'd cleaned up a bit and fed the pigs, fitted that replacement right hand handle complete with it's custom moulded button, and also put the jazzy button tops on the left hand handle |
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