Engine Warm up?
- Thread starter melvinhatcher
- Start date
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thepumpguysc
Elite Member
THATS probably a DEALER question.. That way. when the DPF starts acting up you can say, "Bobby" told me to do it THAT way..
I think that info would be in the owners operating book.??
Personally I would go 3 minutes before moving on w/ the days chores..
What does the machine idle at NOW..
I think the regen will take place no lower than 1800 rpms.. U should keep your machine at or above THAT at all/most of the time..
Its also recommended that it be COOLED before shut down.. Let it idle for another 3 minutes before ending the day.. or just shutting it down for lunch.
You know what I mean..
I think that info would be in the owners operating book.??
Personally I would go 3 minutes before moving on w/ the days chores..
What does the machine idle at NOW..
I think the regen will take place no lower than 1800 rpms.. U should keep your machine at or above THAT at all/most of the time..
Its also recommended that it be COOLED before shut down.. Let it idle for another 3 minutes before ending the day.. or just shutting it down for lunch.
You know what I mean..
RjCorazza
Elite Member
Freep
Silver Member
'Above 32F' includes a pretty wide range of temps! Does Kubota seriously feel that tractors should be warmed up for 10 minutes in the summer time?
I usually go with a flexible 'few minutes', as suggested above, but then I'm fairly new to tractor ownership, so have no experience with failures yet. I want to take care of my tractor, but I don't want to rack up unnecessary hours. Taken literally and prescriptively, it could add a couple hours per week.
I usually go with a flexible 'few minutes', as suggested above, but then I'm fairly new to tractor ownership, so have no experience with failures yet. I want to take care of my tractor, but I don't want to rack up unnecessary hours. Taken literally and prescriptively, it could add a couple hours per week.
OP
melvinhatcher
Bronze Member
My L3301 idle at 900 rpm at start up with the throttle close.
In warm weather I will let it idle at that for two to three minutes then move the throttle up to 1500 rpm for a minute or two while I slowly raise and lower the 3 pt. lift and front end loader.
I generally work the tractor around 1800 - 2000 rpm unless I am doing PTO work or heavy loader work.
After working starts engine speed is never lowered below 1800 rpm generally at 2000 rpm.
RjCorazza
Elite Member
I hear you... I believe the intent of the HST warmup chart is AT 32 deg f the machine should warmup for 10 minutes. I know it says something different. I generally idle for maybe 30 seconds, move the machine outside, then run it at 50% (1500rpm) for another few minutes in anything above freezing.
To Melvin Hatcher,
Don't become too concerned about idling. When you idle a diesel engine with a DPF, the low engine temp produces more soot in the exhaust, which the DPF captures. Obviously, when the DPF reaches near max capacity, it needs to perform a regeneration burn to clear all the soot and start over fresh. So if you idle more, your DPF fills up faster, and you need more DPF regen cycles. More regen cycles is worse for your tractor from a couple of standpoints...much worse fuel economy during a regen, engine oil being diluted by fuel during the regen, and the finite lifespan of your DPF getting a little shorter with each one.
All these things can make one overly worried about how they use the machine. I have a Kubota L2501 (same machine as your 3301 but less horsepower and therefore no DPF). I also have a Kubota MX4800 which is obviously equipped with a DPF. Last fall I needed light for an outdoor project. I let my MX idle for well over an hour just to run headlights and aux lights. No concern whatsoever. Most Kubota owners with a DPF will never put enough hours one their machine to need any sort of DPF service or replacement. And as far as fuel diluting the crankcase oil, DPF tractors have a larger oil capacity than needed.
The Kubota regen process is automatic and seamless. If you are running your RPMs too low when the machine needs to regen, a warning light appears telling you to raise your RPM. The light goes out when they are high enough. I'd just go straight to full throttle. You also get a warning light when a regen is occurring, which goes out when it is finished.
If you need to shut your machine down during a regen, so be it. Don't worry about it. And you can always trigger one manually if need be.
My diesel pickup has a DPF as well, and I idle it as much as I please even though the same issues apply to the pickup as the tractor. If it's hot in the summer or cold in the winter, I idle away.
Just run your machine as if it didn't have a DPF and you are all set. I don't warm my tractors up in the summer, but I do in the winter.
Don't become too concerned about idling. When you idle a diesel engine with a DPF, the low engine temp produces more soot in the exhaust, which the DPF captures. Obviously, when the DPF reaches near max capacity, it needs to perform a regeneration burn to clear all the soot and start over fresh. So if you idle more, your DPF fills up faster, and you need more DPF regen cycles. More regen cycles is worse for your tractor from a couple of standpoints...much worse fuel economy during a regen, engine oil being diluted by fuel during the regen, and the finite lifespan of your DPF getting a little shorter with each one.
All these things can make one overly worried about how they use the machine. I have a Kubota L2501 (same machine as your 3301 but less horsepower and therefore no DPF). I also have a Kubota MX4800 which is obviously equipped with a DPF. Last fall I needed light for an outdoor project. I let my MX idle for well over an hour just to run headlights and aux lights. No concern whatsoever. Most Kubota owners with a DPF will never put enough hours one their machine to need any sort of DPF service or replacement. And as far as fuel diluting the crankcase oil, DPF tractors have a larger oil capacity than needed.
The Kubota regen process is automatic and seamless. If you are running your RPMs too low when the machine needs to regen, a warning light appears telling you to raise your RPM. The light goes out when they are high enough. I'd just go straight to full throttle. You also get a warning light when a regen is occurring, which goes out when it is finished.
If you need to shut your machine down during a regen, so be it. Don't worry about it. And you can always trigger one manually if need be.
My diesel pickup has a DPF as well, and I idle it as much as I please even though the same issues apply to the pickup as the tractor. If it's hot in the summer or cold in the winter, I idle away.
Just run your machine as if it didn't have a DPF and you are all set. I don't warm my tractors up in the summer, but I do in the winter.
Rubicon1000
Member
- Joined
- Feb 7, 2017
- Messages
- 33
- Location
- Indianapolis
- Tractor
- Kubota l2800 4x4 , l3301, bx2670-1, m4900
I usually let the 3301 warm up for a couple minutes and I very seldom run the tach below 2500rpm. Going on 5 years and very little regen cycles.
I have 3 kubotas and I'll let them all but the 3301 idle for a little bit. I don't like the fact that the oil is fuller after a regen. Can't be a good thing but everyone has their own way of doing things.
Dan
I have 3 kubotas and I'll let them all but the 3301 idle for a little bit. I don't like the fact that the oil is fuller after a regen. Can't be a good thing but everyone has their own way of doing things.
Dan
