No I haven't but I will next time. Sounds a good idea.
Last time I repaired one I fitted an `oilite' bush and bored it true in the lathe.
Haven't tried it yet- it'll go in with the stroker crank, next rebuild!
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| Floating Primary Gear Bushes https://ausmini.com/forums/viewtopic.php?f=5&t=6429 |
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| Author: | Christoph [ Sun Apr 17, 2005 11:31 am ] |
| Post subject: | Floating Primary Gear Bushes |
Has anyone tried a fully floating front primary gear bush? They seem less hassle to install and replace than the old type which needs pressing and reaming. |
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| Author: | drmini in aust [ Sun Apr 17, 2005 5:24 pm ] |
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No I haven't but I will next time. Sounds a good idea. Last time I repaired one I fitted an `oilite' bush and bored it true in the lathe. Haven't tried it yet- it'll go in with the stroker crank, next rebuild!
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| Author: | Christoph [ Sun Apr 17, 2005 6:49 pm ] |
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Yeah i thought it sounded pretty nifty... no more pressing and reaming. I bet you had fun setting up the primary gear in the lathe! The only downside is i can only find these fully floating bushes on minispares uk. 16 pounds plus postage? would postage be very much? |
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| Author: | drmini in aust [ Sun Apr 17, 2005 7:24 pm ] |
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Christoph wrote: Yeah i thought it sounded pretty nifty... no more pressing and reaming.
I bet you had fun setting up the primary gear in the lathe! The only downside is i can only find these fully floating bushes on minispares uk. 16 pounds plus postage? would postage be very much? They are only on MiniSpares site because they designed them, not a regular Mini part. Postage... it weighs bugger all, would probably cost around 5 quid or so. More, if they send UPS etc as they often do. Tell `em to mail it..
Setting up primary gear in the lathe was pretty easy with the gear I have. 
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| Author: | justminis [ Sun Apr 17, 2005 8:16 pm ] |
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I use one in my race/sprint mini, no problems. Friend with Nc mini also runs one, also no problems. Both of us found bush needed to be shortened by about 0.040" to work. Otherwise follow the instructions, works a treat. |
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| Author: | Mini Mad [ Sun Apr 17, 2005 9:14 pm ] |
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Anyone care to explain this a bit more? |
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| Author: | drmini in aust [ Sun Apr 17, 2005 9:22 pm ] |
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Mini Mad wrote: Anyone care to explain this a bit more?
Standard 1275 primary gear has steel backed bushes in it, lined with kryptonite  or similar. The front bush wears, partly due to the side load on the gear which tries to make it orbit around the crank as it drives the idler. Fitting new bushes is a PITA as they are pressed in, real tight.
Keith Calver designed this bronze bush to be a slip in fit (once you get the old one out..). If it wears it's easy to replace. 
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| Author: | Mini Mad [ Sun Apr 17, 2005 9:24 pm ] |
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Thankyou muchly
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