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990A David Brown 67/68 model

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M Miles

09-07-2007 13:08:27

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Does anybody know the torc on the head bolts and rod bolts for my 990A David Brown Tractor 1967/68 model

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davebr

09-07-2007 18:51:46

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Re: 990A David Brown 67/68 model in reply to M Miles, 09-07-2007 13:08:27

The torque specs for the head are 90lbs in a sequence of 30, 60, 90. The big end bearing nuts are 50.

The head has a sequence that should be followed. I will number them from the diagram. The line of bolts on the right side if sitting on the tractor from the front are 17, 11, 3, 9, 18, the next row (two bolts) 4, 7 the next row 15, 1, 14. Those two row could be considered as one row but they are offset a bit. If looking as one row it would be 15, 4, 1, 7, 14, the next row two bolts is 6 5, the last row is 19, 13, 8, 2, 10, 12, 16.

hope this helps

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davebr

09-07-2007 14:46:56

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Re: 990A David Brown 67/68 model in reply to M Miles, 09-07-2007 13:08:27

When I get home I'll look at my manuals and post it if nobody else does. it will be a couple of hours though.

Dave Brown

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