gearbox 850 |
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Jim Mac
Moderator Group Joined: 14 May 2014 Location: Edinburgh Status: Offline Points: 3202 |
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Posted: 27 Dec 2017 at 13:56 |
i had to pull the gearbox on my T5 again. Lifting the cover was a bit of a prob, took a lot of levering and gentle bashing. at one point the internals started to lift about 1/2inch so i started again.
got cover off and when replacing found tghat the gear selector drum appears to be too high in the box to allow cover to go back on. it seems solid with no lateral movement, i dont want to pul to hard in case i do something else - has it lifted out of its seat ? the Cluster shaft also appears to be high do i need to strip the box out to fix it - anyone know ? jim https://s5.postimg.org/ece5odrhj/gearbox_2.jpg Edited by Jim Mac - 27 Dec 2017 at 15:18 |
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V85 TT Trzvel BMW R45
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DrDon
Falcone Joined: 28 Jul 2017 Location: Scotland Status: Offline Points: 17 |
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Hi Jim Here is a link to a complete rebuild of a 5 speed box which might be of use to you. Don |
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1200Sport Corsa 8V/Daytona 1000/V50
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Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Offline Points: 17641 |
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There is also the gearbox shim rebuild with pictures by Pete Roper in the FAQ section.
Edited by Brian UK - 28 Dec 2017 at 09:53 |
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Brian.
Better 5 minutes late in this world than years early in the next. |
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Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Offline Points: 17641 |
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Error 404, file not found.
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Brian.
Better 5 minutes late in this world than years early in the next. |
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Dave P.
Senior Member Joined: 12 Jan 2015 Location: Northants Status: Offline Points: 5573 |
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TO LIVE OUTSIDE THE LAW YOU MUST BE HONEST.
1971 V7 Special. 1972 850GT. 1970 T120 Bonnie. 2009 500 Bullet. |
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Jim Mac
Moderator Group Joined: 14 May 2014 Location: Edinburgh Status: Offline Points: 3202 |
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Thanks chaps. I had found the pages. Anyone actually stripped a box, or know if there is a simple fix ?
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V85 TT Trzvel BMW R45
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jpc
Senior Member Joined: 06 Oct 2016 Location: Belgium Status: Offline Points: 651 |
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There are probably a few on the forum who've stripped & rebuilt gearboxes, but that doesn't help you
now. The fix if you feel lucky today: 1) Pull out the rod passing through the selector forks (pull & twist gently to overcome the suction from the oil). 2) The forks are now free to be disengaged from the drum (swing them away from the drum). 3) The drum is now free to be jiggled a bit, and should plunk back down into its locating hole. 4) Turn the drum to neutral position (IMPORTANT) by seeing that the knob on its side contacts the neutral idiot light contact blade. 5) Reposition the fork pegs in the drum tracks until they align for the rod as before (tricky). 6) Push the rod back in through the forks & into its hole at the bottom. Done. You can't break anything if you don't use brute force. jp
Edited by jpc - 29 Dec 2017 at 19:51 |
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DrDon
Falcone Joined: 28 Jul 2017 Location: Scotland Status: Offline Points: 17 |
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Hi Jim
Did you remove the detent plunger before you lifted the shift drum. If not it will have sprung into the vacant space below the drum and will now be preventing the drum from fully seating. Don
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1200Sport Corsa 8V/Daytona 1000/V50
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jpc
Senior Member Joined: 06 Oct 2016 Location: Belgium Status: Offline Points: 651 |
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Thanks for spotting that, Don, I forgot about the plunger !
I hope Jim can manage it. jp
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Mike H
Senior Member Joined: 21 May 2014 Location: East Anglia Status: Offline Points: 8733 |
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Doh!
Didn't think of that, but makes sense. |
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"Chicken nuggets don't dance on a Tuesday."
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Jim Mac
Moderator Group Joined: 14 May 2014 Location: Edinburgh Status: Offline Points: 3202 |
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thats what happened, when i lifted the drum the plunger plunged under it, stpping the drum from dropping back down. i will get cover back on tomorrow, too cold to do it at end of day
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V85 TT Trzvel BMW R45
Too old to die young |
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