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Case Tractors Discussion Forum
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David Brown 990 ,Brakes Clutch Question

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Dave2pa

05-12-2007 13:52:57




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hello
working on a 990 selectamatic that has been sitting awhile Clutch is stuck and now we find the right rear tire will NOT turn . does it have Dry Brakes?? how do you access them ?? is there anything else that might have the right rear froze up?? also is the clutch disc recessed in the flywheel?? is so how far??




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richard in nz

05-12-2007 19:43:26




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 Re: David Brown 990 ,Brakes Clutch Question in reply to Dave2pa, 05-12-2007 13:52:57  
Brakes are a normal drum brake on the diff output shafts. Access by removing the reduction assembly. CAUTION on the right hand side engage and tie down the diff lock pedal before pulling the reduction off or the diff lock coupler dog will fall in to the rear end casing and is a sod to retrieve! The cam shafts on these brakes can sieze up where they pass through the casting, give it a good dose of your favorite penitrating spray and work it free.

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Dave2pa

05-13-2007 05:16:17




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 Re: David Brown 990 ,Brakes Clutch Question in reply to richard in nz, 05-12-2007 19:43:26  
the shaft where the brake rod hooks onto does rotate freely ,but there is no spring tension pulling it back from inside ?? are there return springs inside ? there is no tension from inside, does this mean for sure the shoes are seized to the drum??



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Elmer

05-13-2007 06:46:54




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 Re: David Brown 990 ,Brakes Clutch Question in reply to Dave2pa, 05-13-2007 05:16:17  
No, the actuator shaft is seized. Remove both of thet and clean the shaft up and apply anti seize compound. Make sure there is no oil leakage from behind the drum. There is a 3/8 bolt on the top side of the final drive cover that is drilled to allow the case to breath. Make sure it is clear too. Replace the axle seals in the diff housing as well.



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jimont

05-12-2007 14:22:34




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 Re: David Brown 990 ,Brakes Clutch Question in reply to Dave2pa, 05-12-2007 13:52:57  
Dave - Go to www.dbtc.co.uk They were talking about stuck cluches on 990's just this week. You may have to do a search there, but there were many replies from the home of David Browns.



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