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Case Tractors Discussion Forum
Show Parts for Model:

Case O Matic

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orangepower

08-15-2014 18:34:28
173.209.211.158



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Been reading about them online. Never used one before. So it has to be idling when you let out the clutch and start moving? Are COMs not good then for say hay baling or bush hogging when the engine is up at the 540 rpm pto speed and you have to step on the clutch to stop for a moment? Might go look at a 830 COM diesel. Thanks.




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jon f mn

08-16-2014 05:38:13
75.161.175.251



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 Re: Case O Matic in reply to orangepower, 08-15-2014 18:34:28  
Stopping is not an issue, then just throttle down let the clutch out and go. They work great for the jobs you mentioned because when you need to slow down you can go to COM then back up when you want to speed up again. We used our 830 on the baler til dad traded it for a 730 dry clutch. The later models had the inching clutch on them at least in the comfort king models. I don't know the year they changed.

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Graham from New Zealand

08-15-2014 19:08:30
58.96.55.23



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 Re: Case O Matic in reply to orangepower, 08-15-2014 18:34:28  
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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