CK 30 RPM's

jimmyj · Mar 30, 2009

The manual for my new CK 30 HST has a statement in it about what RPM's to use for various tasks.

It says basically, "refer to the table below for RPM specifications in various uses"

........then, of course, there is no table in the manual.

I know the rear PTO RPM marker is about 2600 RPM's and I tend to run about 2000 for most tasks with travel or using the FEL after some of you posted some advice for me earlier.

Any other RPM advice out there?

Gittyup · Mar 30, 2009

No majic settings, except when using high RPM implements like mowers, tillers, and chippers. For these run at PTO RPM mark. For other things you can run lower and or vary using the foot throttle. However, on some HST's it is suggested that you always transport at or near full RPM's. I think this might reduce wear on the tranny. Your loader will also cycle faster at high rpm.

contdevelop · Mar 30, 2009

I have the CK30 with the HST also, and my dealer told me to pretty much always operate the tractor with the RPM at the mark on the tach. He said I could cause problems to the hydro if i drive it at a lower RPM.

MichiganIron · Mar 30, 2009

On the HST Tractors, minimum rpm is 2000 to provide the proper charge pressure in the hydrostat. Starving the hydrostat by not producing enough charge pressure it's a good thing for the hst.

jimmyj · Mar 31, 2009

Thanks very much guys. Very helpful.

mauistardog · Mar 31, 2009

Wow, did not know about the minimum 2000 rpm for hst. but I pretty much have mine about that if driving, but drop down to 1800 or 1900 for the backhoe, any higher and I bounce around a little to much.

joe

Highbeam · Mar 31, 2009

I pretty much always run lower like 1800 for most work unless I am in a hurry or need extra power and then run up to 2000. When using the PTO mower, the RPMs are set to PTO540.

I also have never heard of this minimum of 2000RPM. That's pretty rev'd up and noisy.

ToadHill · Apr 1, 2009

I run mine where it sounds "sweet" that's between 1900 and 2100 rpm. If I'm usinf the pto I use the redline but most of the work is done in the sweet spot.

jimmyj · Apr 1, 2009

It is interesting as this goes on - I was doing the same as the last 3 posters. But, MichiganIron is a very knowledgeable dealer so I would not discount that advice for sure. Sad that the manual is missing the darned table.

Yesterday I ran at 2300 RPM and it was still really smooth. I dont' want to mess up the HST although I will be putting the BH on soon and want to see how it feels. (Have never really used it as I just got it before the winter freeze up).

IXLR8 · Apr 1, 2009

Hmm, this is the first I have heard of a 2000rpm min for HST use. I typically run between 1500-1800 as it gets the job done with minimum noise. The only time I run at 2000 or higher is when I want to get somewhere in a hurry and I am using high gear. I don't doubt what MI says, I would like to understand more the why such high rpm is required.