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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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SPRAG CLUTCH

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Scott Nichols

12-06-2007 03:29:06




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WHEN YOU REFER TO THE SPRAG CLUCTH ON HERE ARE YOU TALKING ABOUT THE CLUTCK PACK BETWEEN THE BELL HOUSINNG AND THE GEAR BOX ON THE FRONT OF THE REAR END I WAS TAKING MY 770 APART YESTERDAY AND NOTICED THERE SEEMS TO BE ONLY ONE SHIM BETWEEN THE PLATES DOES THIS MEAN THAT SOMEONE HAS ADJUSTED IT THE PAST OR SOMEONE TRIED TO ADJUST IT DID NOT UNDERSTAND HOW TO ADJUST IT I HAVE THE ADJUSTMENT ON IT THE MANAUAL AND THE BEST I CAN TELL IT IS NOT SUPOSSED TO HAVE LESS THAN THREE SHIMS UNDER EACH SET OF BOLTS DOES ANYONE KNOW ANYTHING DIFFERENT

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ADB-IA

12-06-2007 06:45:45




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 Re: SPRAG CLUTCH in reply to Scott Nichols, 12-06-2007 03:29:06  
The clutch pack you are referring to is the direct drive clutch. It is a friction clutch and the shims are to adjust it for normal wear. As the clutch discs wear you need to remove shims to keep the clutch from slipping. There isn"t a minimum number - just keep all three sets the same. The sprag clutch (low side clutch) is located behind this clutch on the output shaft. It is an over-riding clutch that alows the shaft to turn faster than the hub but not slower. It is driven through a gear reduction from the front shaft. When the direct drive clutch is engaged the output shaft is turning faster than the sprag clutch but when the direct drive clutch is disengaged the sprags in the low side clutch engage and turn the output shaft at the reduced speed. Hope that made sense. ADB_IA

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