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| clearances https://www.ausmini.com/forums/viewtopic.php?f=2&t=61043 |
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| Author: | 72clubman [ Fri Feb 12, 2010 9:02 pm ] |
| Post subject: | clearances |
what is the effect of too much clearance on idler gear? and too much clearance on primary gear? by too much just say 10thou |
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| Author: | GT mowog [ Fri Feb 12, 2010 9:07 pm ] |
| Post subject: | |
Too much Idler gear clearance (0.010 or so) will make it noisy, particularly at idle. On the Primary Gear, do you mean end clearance or bush-to-shaft clearance? Too much end clearance again will make it noisy and it may weep a bit of oil in to the flywheel and on to the clutch. Too much bush-to-shaft clearance can give clutch shudder and oil on the clutch and possibly oil leaking past the seal. |
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| Author: | drmini in aust [ Fri Feb 12, 2010 9:10 pm ] |
| Post subject: | |
Too much primary gear bush to shaft clearance (front bush worn) will make it noisy too. Easiest way to fix this is fit a floating front bush. No machining needed (once you get the old bush out). Available from Karcraft or Minisport SA. |
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| Author: | 72clubman [ Fri Feb 12, 2010 9:18 pm ] |
| Post subject: | |
i mean end clearance the gap between primary gear and c clip and washer what would you say too tight clearance on both will cause eg under 3 thou? |
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| Author: | drmini in aust [ Fri Feb 12, 2010 9:52 pm ] |
| Post subject: | |
Under .003 on the idler is a real worry. A friend once built a motor which had only .0015" or so clearance cold. When the motor heats up the clearance reduces, he had trouble getting gears. We had to pull it apart and change a thrust washer. Under .003 on the primary gear and you won't get a decent oil film on the bronze thrust washer or into the bushes. Could seize up. |
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