Technical & Reference Section > Tech and Restoration
1982 Shimano 4000 build.
Avro:
Thanks for that. This video is much closer to what I am aiming for in terms of production. It's a challenge really as I am not too good on computers and the like. It is also a way of using the hobby to explore more avenues of interest.
I generally polish by hand, either free-hand or with the aid of blocks. I have a lot of radius blocks and tight corner blocks from model making and they are handy. I do have a small bench grinder with is dedicated to polishing but I rarely use it. I am always fearful of loosing edges and detail.
I have been watching a few videos lately made by clock makers and jewellers to see how they tackle polishing. In particular one of the clock makers takes polishing brass to dizzying heights. It was from this inspiration that I am looking into different grades of paste polishes.
Anyway, thank you for the kind words, much appreciated!
Avro:
I have quite a few sets of pedals, two pairs of Lightnings. two pairs of SR MP130 and a pair of Surefoot II (SR MP120). Some of them are in very poor condition, at least the cages are. I will be having a go at restoring them in the future. One of the pairs of SR MP130's are rather nice, too good to warrant restoration. They are blue also and earmarked for the Shimano 4000.
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Yes they are scratched up on the ends but plenty good enough. Problem is that they are 1/2". My other pair of SR MP130's are also 1/2". Looking at the Surefoot II's (MP120's) they look to have identical bodies to the MP130's but different cages and spindles. The Surefoots are 9/16" and it just so happens that they are earmarked for future build that requires 1/2".
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An opportuinty to kill two birds with one stone.
With the pedals stripped down it was time to compare the spindles:
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Save for the different finish and machining of the threaded ends they will swap just fine. A regrease and reassembly and one step forward.
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Avro:
Time to fit the cranks and a few remaining bits and bobs.
The cranks are fixed to the square-taper axle with Shimano's 'One Key' system, which is so simple and effective. The 'One Key' consists of a chrome threaded end cap, a thin shim, retaining bolt and a thick steel washer. The steel washer sits in the bottom of the recess in the crank where the other fittings go. It has the same OD as the chrome end cap so will not slide inside it. Next goes the bolt, then the shim which fits over the head of the bolt. This shim sits inside the chrome endcap. Next screws in the endcap. The end result is to make the retaining bolt a captive bolt, free to turn but retained inside the crank effectively. The cranks tighten up to the axle in the conventional way. However, when you go to undo the bolt again, as it is captive, it becomes it's own puller and the cranks are easily removed. One key to put them on and the same key to take them off. It must put a fair amount of strain on the bolt threads but it really does work. I think it is neat anyway 8)
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So cranks on, chainwheel on and Izumi chain fitted, easy. Pedals followed.
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The grips are Fuan. I was looking at the picture of the Shimano 4000 at the start of this thread and the lad looks to have Fuan grips, or possibly Oakley, fitted so they are in keeping.
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The silver chain is also a nod to that picture although I can not spare a set of Shimano DX pedals for this build with two other builds demanding them. When new, complete Shimano 4000 and 5000's were specified with KKT Lightnings and I may swap those in once I find time to restore a set. I noticed that the link tothe magazine advert for both the Shimano 4000 and 5000 completes is broken, unfortunately I have not been able to track it down again.
BMX1973:
Lovely. :4_17_5:
Mikku:
Amazing attention to detail! Looking forward to seeing this finished! :4_17_5:
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