My CK20 hst tends to stall on take off

[cdt80]

<font color="blue"> Is it really OK to crank it up to 2800 RPM, and fully load the loader and hoe, with only a few hours on the clock? </font>
This addresses the thought process that a new engine is tight and need to loosen up a bit before you go full throttle. If you actually think about it, that logic doesn't make sense. If the engine is too tight at high rpm then it is too tight at idle. The tolerences don't change from high rpm to low rpm. I stand by my point that the first 5 minutes of an engines life are the critical ones. After that it's just up & down, round & round.
Good operating procedures would include proper warmup times on startup of course (no hard revs for a couple of minutes) and of course wide open with no load for extended periods of time doesn't really make sense either.
Really, not all jobs require full throttle and you don't have to run it that way if you don't need to. But on the jobs that require full throttle-USE IT! Your tractor will thank you in the long run.
Lugging creates excessive heat, poor lubrication, carbon and deposit buildup, poor combustion, stress, the list is endless.
Break it in like you are going to use it.

 

[TractorLegend]

just keep 'er under 100mph in the corners...

 

[markkioti]

I always break in my equipment....... I have many dollars invested in the trucks , cars etc..... There is nothing WRONG with braking something in. Espescially if you own it for 200-300k miles

 

[BigDogues]

I have been running my CK25hst at 2600 rpms when doing loader work. That's where the little red mark is on the tach. I've been careful not to exceed that speed but sometimes the engine bogs if I try to take too large a bite. (My loader skills are getting better every day! /forums/images/graemlins/grin.gif)Are you saying I can run my rpms a little higher than normal operating speed sometimes? Will that help with the engine bogging down?

 

[Bob_Skurka]

B.D. The little mark on the tach is the indicator to show 540 PTO speed. You can theoretically run your engine at any speed for loader work, many people seem to run them around 2000 to 2300 rpm for loader work. It is likely you'll have more horse power at higher RPMs (I'm making that assumption, I never looked at the torque or HP curve for you particular engine), the hydro pump will also be pumping more fluid so everything will work faster. There is no reason to limit your engine speed to the 540pto speed, your engine should easily be able to run at full RPMs all day every day (full RPMs are restricted by a governor, most HST tractors won't run too much faster than whatever it takes to run the PTO at 540). In theory, the higher the RPMs, the less likely you would be to stall, or even slow the engine. In practice you might want to just lower your gear range, just doing that will give you more power.

 

[shadoe]

Maybe I missed it, but did Mark say if anything worked? /forums/images/graemlins/confused.gif /forums/images/graemlins/confused.gif

 

[TractorLegend]

No harm in 2000 plus rpm---gas burners are just off idle at this speed... no worrys mate. Just warm it up before hand. Turns out too much idling no good either. /forums/images/graemlins/shocked.gif

 

[KiotiJohn]

</font><font color="blue" class="small">( Maybe I missed it, but did Mark say if anything worked?
)</font>
I didn't see a response after he said he would try things out some "next" day. I guess it worked better since he didn't come back and say we were WRONG! LOL
John

 

[shadoe]

Good point John. haha /forums/images/graemlins/grin.gif

 

[markkioti]

I got a CK30HST, loader Backhoe Package <font color="orange"> </font>