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I have found broken 8mm bolt in drained oil

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Martin Flash

05-24-2006 12:02:27

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David Brown 990 - I have found broken 8mm bolt in drained oil

Hi!
I can have a problem soon...
I have found broken 8mm bolt in drained gearbox/hydraulic oil drain plug (look link below to see the picture).

Link
Link

Does anybody know what can the bolt be from? Is it possible to came from the gearbox or it is from PTO part? By the way the shifting lever for the PTO is free, I mean that when I shift it to neutral it falls down and engage low speed PTO. It is not standing itself into neutral. Can this bolt be from this mechanism? On the second picture you can see the old oil colour from back gearbox/hydraulic system, it looks white! Is it OK or one of the synchro is gone?
Or maybe it is from differential engine?
Sorry for the oil on the floor but I had accident with the bucket:)

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Walt Davies

05-25-2006 09:11:04

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Re: I have found broken 8mm bolt in drained oil in reply to Martin Flash, 05-24-2006 12:02:27

that looks like the bolt that holds the shifter fork inplace. You need to pull the top and look at it and then look for damage to any gears in the system. It must have hit one or two, to get that damage on it.
Walt The theads look like metric they are rounded over not sharp like american standard. Walt
Does it have a hole in head for a wire to hold it in place.

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Martin Flash

05-25-2006 09:19:23

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Re: I have found broken 8mm bolt in drained oil in reply to Walt Davies, 05-25-2006 09:11:04

No, there is no hole in the head. The bolt is of course amecican and it is in inches, but I live in Denmark and we have metric system that is why I set around 8 mm. can you email me a scan from partsbook which bolt it is?
Thanks
Marcin

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richard in nz

05-25-2006 02:59:00

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Re: I have found broken 8mm bolt in drained oil in reply to Martin Flash, 05-24-2006 12:02:27

I don't recall David Browns using metric bolts at all. All English sizes then American but never metric. If this is an M8 bolt it is'nt out of a Brown.

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Matin

05-25-2006 05:58:32

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Re: I have found broken 8mm bolt in drained oil in reply to richard in nz, 05-25-2006 02:59:00

you must be very clever than... is that you that invented David Brown tractors?

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noncompos

05-24-2006 22:12:45

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Re: I have found broken 8mm bolt in drained oil in reply to Martin Flash, 05-24-2006 12:02:27

FWIW:I know nothing of your rig; that being said, the bolt doesn"t look broken (unless it was longer and the oil is obscuring the new break, and also assuming it"s the bolt in the pic on your posting--I couldn"t get the link to come up) BUT something hard sure took a gouge out of it"s head, which looks fresh...if it isn"t broken, it looks like it unscrewed and fell into something moving to get that gouge, something which could also be damaged...and if it isn"t some kind of self-locking bolt, where"s the lock washer or safety wire???

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coke bottle bottoms

05-24-2006 16:19:45

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Re: I have found broken 8mm bolt in drained oil in reply to Martin Flash, 05-24-2006 12:02:27

gee whilikers. thats a big ole pikchure..why i never change oil just makes more work.it like goin to the doctor ya feels half way good when you gets there and poor as a crow when ya departs

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