I have owned many Cases over the years, but never a COM. Jon F MN explained how they work, and how to run them. I should have taken notes while he was talking. Could someone re explain how to operate one. I want to be a guy who loves then, not a guy who does not know how to properly use them, and then hate it. Thanks, Bill
- Thread starter Hoofer B
- Start date
Bill, I own alot of cases but non are com.I have been told that you love them or hate them.Personally I think that alot of dealers didn't explained the com to the new owners very well if it was a used tractor. and if it was case tractor traded in on a different brand of tractor.Alot of those sales people didn't know the system.
Just think of it like an automatic transmission that's attached to gears.
To start rolling on a tractor with a COM you let off the gas push the clutch in and put tractor in desired gear ( gears may grind a little due to COM) Then slowly let out clutch and rev motor speed up ( similar to regular clutch). At this point your transmission is like an automatic car transmission
When tractor reaches 70-80% of desired speed, let off gas just a little and pull back on COM and accelerate again. With COM locked up it becomes a direct drive, gear transmission. The 70-80% might be more or less depending on load being pulled or torque you need from the motor.
It's something that you figure out after a couple uses of the tractor. Each tractor is a little different but that's the way I learned.
That may not make sense reading through but if we were sitting on the tractor it would be somewhat helpful.
To start rolling on a tractor with a COM you let off the gas push the clutch in and put tractor in desired gear ( gears may grind a little due to COM) Then slowly let out clutch and rev motor speed up ( similar to regular clutch). At this point your transmission is like an automatic car transmission
When tractor reaches 70-80% of desired speed, let off gas just a little and pull back on COM and accelerate again. With COM locked up it becomes a direct drive, gear transmission. The 70-80% might be more or less depending on load being pulled or torque you need from the motor.
It's something that you figure out after a couple uses of the tractor. Each tractor is a little different but that's the way I learned.
That may not make sense reading through but if we were sitting on the tractor it would be somewhat helpful.
Bruce from Can.
Well-known Member
- Location
- Woodville, Ontario, Canada
My brother had a 530 Case-O-Matic with a loader. It was very tired old tractor when he bought it. Came from a retired dairy farmer, that had bought it new, and I think it spent it’s working life at the end of the stable cleaner . His tractor was a gas, low profile, and it was like a tank. Rarely would you spin a wheel loading manure with this tractor. We always started this 530 while it was in gear, cause we could never get it to stop grinding the gears if you started it in neutral and then select a gear. Once running and in gear, you could clutch and shift smooth as silk. We found the tractor slow and lethargic to use for anything but a loader job. He sold it after about 10 years, and bought a IH 585 with loader, that way he could load and haul bales with the same tractor. While I understood how the COM worked, I never really liked it much. The Case backhoe industrial tractors had pretty much the same idea.
comfortking
Member
I grew up on an 830 com .Like has been said when you have found the gear you want let the "clutch out at a the lowest idle it will run. then accelerate and let off of it to go to direct much like you would shifting a standard auto. When changing gears stop and let it go to low idle before taking out of gear, then shift. There is a way to grind the edge off the spool so you can let the clutch out and engage it like a clutch tractor. We have an 800 that we mow with and I can ease it in at full throttle. If you have good brakes you can hold them and let the clutch out at a higher idle. I think the com works better in diesel tractors vs gas. With a diesel there is never a reason to kill them as you could with a clutch. I love them.
jon f mn
Well-known Member
When using them on a loader you would never use the lockup. Just use it in come and ease into the load. Also although it is easier on you to let off on the gas when going to direct, in anything below road gear it is not necessary. So if you are doing some tillage work and run low on power just bump the lever down into com to power through, when you are going again just pull it up to lock up and away you go. Just like a power shift. On hard ground in higher gears they do jerk some so it helps to let off the gas a bit like shifting a truck to reduce the jerk.
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