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Case Tractors Discussion Forum
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direct drive

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Author 
dk

02-04-2008 20:49:05




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I bought a Case 800 Case-o-matic and it don"t want to go into direct drive. it leaks fluid from the clutch hydro block and won"t hold clutch preasure in direct drive. what is direct drive and how do i go about fixing it?




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R Aiken

02-05-2008 07:20:56




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 Re: direct drive in reply to dk, 02-04-2008 20:49:05  
I had an 830 com that went bad, didn't fix it, was too far gone. I replaced the com with a standard clutch from a 400. Changed the houseing, flywheel, clutch,and preshure plate. Also the foot pedel and linkage, it all bolted right up. This might be better than repairing the com.



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INCase

02-05-2008 05:14:21




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 Re: direct drive in reply to dk, 02-04-2008 20:49:05  
If you have fluid leaking from the clutch valve body (on left side of torque tube with clutch pedal and DDrive lever attached, you"ve got to fix that 1st. Probably a bad seal(s). To answer your question, direct drive locks the torque converter by means of a clutch disc that is hydraulicly activated. This prevents the torque converter from getting too hot when pulling (plowing ect) for a long period of time. It also makes the unit more efficient as the torque converert slips by design and the DDrive does not. BOth the DD and the main clutches are hydraulicly activated. Therefore it is important to have the hydraulics of the Case-o-matic system in good shape. Good seals, good/proper fluid, good pump ect ect. The regular clutch pedal acts like a normal clutch. The Torque converter is always spinning with the engine, and this drives the main clutches. when when you press in the clutch pedal it hydraulically disengages the main clutches. When starting out you always use the torque until the tractor and implement is up to speed then engage the DD to lock in the unit. You should feel a distinct jump when engaging DD. Good luck.

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