Combines CTS Beater speed limitation

[Rod]

I could never get both of my CTS to work with any capacity the way they were set in the book. In canola I found to run the cylinder at 460 - 550 rpm with concave at least half way open. Fit rear concave inserts - leave them in for all crops except corn. Pre-cleaner 2mm, top seive 12mm, bottom seive 2mm, fan 850-860. Wheat: cylinder 780-850, concave 10-12, precleaner 10mm, top seive 16mm, bottom seive 6mm, fan 1200-1250. Barley: cylinder 750-780, concave 10-12, precleaner 10mm, top seive 19mm, bottom seive 7mm, fan 1150-1180. You are right about the overshot beater. They should be running about 850rpm instead of 740. I have swapped the top pulley to the bottom and vice versa. This makes the beater run at 950 which does make a huge differance but you loose to much torque. If you can fit both the driven and the drive pulley of the same diameter this will give you a speed of 850-860. Since you have two machines the same you could pull one pulley of one and fit it to the other and see if this helps out. You may have to cycle the power switch for the computer to recognise the change in speed of the beater.

 

[Darryl]

Could you please explain what the longer intake paddles on the tines areIJ Are they a JD part number or an aftermarket item. I have heard that they have a different design beater you can get, it is shaped like a W, in that it uses 2 v's to split the flow into two streams so that the material flows better into the two tine separators and does not get hung up between the two. Have you had any trouble with backfeeding in canola on your cts2's. In a short dry canola windrow that is 7.6 meters(25') of cut and yielding about 1.23t_ha (22 bushels_acre) I can only do 4.5 kph (2.8 mph) before the combine backfeeds and starts banging away. This is the afternoon speed when it is hot out, in the morning when cooler I can travel 8 kph (5mph) in the same windrow, same field. Any advice would be welcome!

 

[FarmBuddy]

It sounds like the two Vs would form a W similar to the transition impeller used on the lexion rotary separation models. This seems to work very well on the lexions, but they also have the much added advantage of flowing crop under their impeller _ beater. The JD CTS trys to loft it over the top of their beater, which results in a loss of positive flow and control of crop.

 

[Darryl]

I was told that the Cat undershot beater is a patent and the way around it for JD was to go to the overshot beater. It is difficult to take a solid sidways stream and split it into two parallel streams. I am not sure why the overshot beater is not related to cylinder speed. In hard to thresh crops where you have the cylinder running faster it would require a fast beater speed. In very easy to thresh crops like peas and canola it would be nice to have the beater slow down with the cylinder.

 

[FarmBuddy]

The JD CTS overshot beater is synchronized with the cylinder. Output from the threshing cylinder on the left side drives a belt into a small gearcase (quite similar to the 9610 walker drive gearcase) to give a counter rotation and speed reduction. Therefore, if the threshing cylinder speed is changed there is a proportional change in the JD over shot beater speed. I've never researched it real close, but I think the Claas _ Cat v-shape (aka chevron) undershot impeller may have a patented precedence over the JD CTS configuration, which is an alternative, albeit less ideal way to move the crop. The CTS also has the 4" diameter stripper roller to help transition material to the overshot beater. It's driven on the rightside, but I'm not sure how fast that is driven. Overall, the lexion has an advantage with the more positive crop flow achieved with the under beater delivery to the two separation rotors. The lexion as has more separation speed selections, with three belt ratios standard or variable speed as an option.