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Case Tractors Discussion Forum
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Re: Case O Matic

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Graham from New Zealand

08-15-2014 19:08:30

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I have a 1962 530 Case-O-Matic and used it for years on forage harvesters and balers and all you do is get machine up to somewhere near speed, cut the throttle and let out the "clutch" pedal and throttle up again. No trouble. I have a 1966 830 which
replaced 530 on same job but has standard clutch. However I did have occasion to use another 830 fitted with Case-O-Matic on the forage harvester and found the clutch could be engaged at PTO speed. Upon looking at the parts and Service books it appears the valve spool has a helix (I think that is the term) machined in it so that the oil is not cut off in an instant but has a "leak path" so the tractor moves off without a jerk at PTO speed, so cutting the throttle is not necessary. Have others found this, I wonder? The Case-O-Matic, if you work with it and not against is a great drive and was just ahead of it's time. Never gave a moment's bother and after many thousands of hours has never been repaired and is still going, but I did keep the oil and filters well serviced.

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