My ck25 HST stalling !

DK35vince · Jan 20, 2005

( Vince,
I didn't crank up the rpm's at the time. What would be considered 'full throttle' at a safe level for a ck25. )

Full throttle.
Push that throttle lever as far as it will go. No need to run it there all the time, but if you need more power don't be afraid to crank it up. The engine has a governer to keep it from overreving.

DK35vince · Jan 20, 2005

( Keep in my when your tractor starts to run out of power ease up on the hst pedal just a bit and recover the lost rpms )

The reason I wondered if Kevin was pushing a little to heavy on the hydro peddle was because the tractor was running out of power enough to stall.
Backing off the hydro peddle to keep the RPM's up usually prevents any stalling.

Steve_Miller · Jan 20, 2005

Kevin,
I would speculate that with the traction you will get from the bare pavement you are probably straining the hydraulics as you don't have it up to full RPM's thus the combination of the load of the drive train and the engine trying to overcome that load plus the relief valve in the system is just too much at that RPM. As Vince pointed out don't be afraid to run it wide open, its governed so it will not over rev and hurt anything. As Wallace pointed out on an HST ease up on the pedal for more power as it cuts down on hydraulic flow and will allow for more power to the drive system. A throttle pedal sort of works in reverse of an HST pedal, with a throttle pedal, the further you push the more fuel is fed to the engine producing more RPM's (power), with the HST pedal the further you push it the more you load up the engine (hydraulic load), the drive system is wanting to speed up, thus loading up even harder. Let us know how your making out. I'm assuming your out plowing now as the storm ended here 4 hours ago, I just got done, got a few snow banks almost 8 feet high now. Will try to post some pictures tommorrow.

Steve

KiotiKevin · Jan 21, 2005

Thanks guys for the feedback.
To anyone out there who is just buying a tractor or has just bought one - this thread is a prime example of the very reason why 'Tractorbynet.com' and the people who contribute is so important in the everyday enjoyment of my CK25. Who would ever think otherwise ! I'll keep you posted.

Steve- we only got a couple of inches here on the eastern shore of Cape Breton. Sounds like you guys got nailed.
Kevin

KiotiJohn · Jan 22, 2005

Kevin, one thing I wanted to say to you is about using the FEL.
It takes a little practice to get loading the bucket up just right without causing a lug down of the engine.
I think you'll find that if you start moving into the pile with the bucket cutting edge aimed slightly down, and start your rollback as you enter the pile and also start bringing it up all the while varying the forward motion with the treadle pedal will go a long way to getting you a good bucket load and not dragging down the engine.
You'll also find that many times, you'll rollback some, get some load, drop the cutting edge back down again, dig some more the same way until you have it loaded full.
If you simply push into the pile with the pedal pushed all the way down and try to just lift right up, you may find the engine under strain, or may hit the relief pressure.
It's just a matter of experimentation as to how much pedal and how much loader movement you need.
I find that I often am doing F/R actions, working the joystick in all kinds of directions until I've gotten a good bucket load. There's no need to EVER push the clutch in to relieve the engine strain, just back a little, go to neutral, or move the loader bucket to relieve the resistance it's encountering.
Also, always make sure in that very cold weather that you let the tractor warm up for 15 minutes. Let the clutch out so that fluid traverses the system and gets warmed up, because cold hydro fluid can cause pump damage.
You'll get better and better at it quickly.
Remember that the HST pedal is more like a gear than a gas pedal. The more you push the pedal, the more it equates to having a gear drive in HIGH gear, less torque. John

KiotiKevin · Jan 22, 2005

It's just a matter of experimentation as to how much pedal and how much loader movement you need.

It's funny you should mention that because that is exactly what I was doing yesterday. We are supposed to get another 8 inches of snow on Sunday so I'll give it another try before I let the dealer's mechanic adjust the HST valve. He is supposed to send one to have a look at it next week. I even forgot about the floating bucket thing when scraping the driveway yesterday. I guess I'm learning something new every day thanks to you guys. Thanks John

Kevin

readytogo · Jan 26, 2005

I had the same problem with my Ck 30 when doing heavy FEL work. ~ Upped the rpm's and problem solved!
This is a GREAT site!
Had about 6 inches of light snow over the weekend ~ {was hoping for more! /forums/images/graemlins/mad.gif] Had a great time moving it around. /forums/images/graemlins/grin.gif

Luremaker · Jan 27, 2005

I would think that most if not all Canadian diesel has some kind of antigel in it because I have been using regular diesel from the local service station with out any additives and I have had no problems starting or running my tactor. We just went through a cold spell where the temps never went above -18 to -32 degrees C (1 to 25 below degrees F) for almost 2 weeks. Even on cold mornings when I forgot to turn on the block heater timer the tractor started right away! I park my tractor in my unheated pole shed.