I Still Hate My Tractor

[Chilly807]

A governor trying to keep rpm up would add fuel & should make more smoke doing it, no? (.. clean burning at most speeds when unloaded? ..)

The governor has two primary functions, one is to measure the engine speed, which a mechanical type does via a set of flyweights. It also moves the fuel rack to correct under speed or over speed conditions. In this context, that means any variation from the set speed. Most diesels run the cleanest at close to full load, higher cylinder temps burn fuel more completely, etc. Low loads tend to build carbon and soot in the combustion chamber.

Sean

 

[kuboman]

The oil cooler for the L5740 will bolt right on to the V2003. It is an oil to coolant heat exchanger the fits behind the oil filter. As for an intercooler as I have understood, anything under 7psi does not generate enough heat to make the cooler worth while. A boost pressure and exhaust temp will be necessary to get maximum benefit from the turbo without cooking the engine.

 

[ericher69]

I have to fill my 330 gal. tank later this month I'll be sure to use ULSD on road. Thanks, Fred

Fred,

Are you currently using ULSD in the tractor?

Your statement a above leads me to believe that you are using some other fuel...

 

[buickanddeere]

It's typical to do that to promote scavenging of the cylinders, since the intake manifold is under pressure any time the engine is loaded. Once the intake opens, air under pressure rushes in and carries spent gases out the open exhaust valve until it closes, after that the cylinder is pressurized until the intake closes.

Sean

Check that intake and exhaust manifold pressure under boost. Cam timing, duration and overlap too. The exhaust manifold will have higher pressure in almost every turbo application. The pressurized intake air does not push exhaust gasses out of the combustion chamber.

 

[kuboman]

Check that intake and exhaust manifold pressure under boost. Cam timing, duration and overlap too. The exhaust manifold will have higher pressure in almost every turbo application. The pressurized intake air does not push exhaust gasses out of the combustion chamber.

Actually it does. That is why an engine designed for a turbo has the valve overlap it does. It also promotes cooling of the exhaust valve.

 

[sd455dan]

A governor trying to keep rpm up would add fuel & should make more smoke doing it, no? (.. clean burning at most speeds when unloaded? ..)

Fred's intake opening event should align with whether factory specs consider cam rotation before the .050" he timed at. Show me 30^ of 'ramp' (take up lash) and/or to get that .050", and Fred's '15^ after' could be someone's '15^ before'. (Cam is ok if so?) Gotta be sure where lobe center is and where it's best measured in crankshaft degrees.

I've seen oil 'coolers' that were just long lines out into the airstream somewhere and back vs finned or thru a core. See the boneyard for odd shaped/sized coolers/cores with various inlet/outlet openings. Inter-cooler volume can add to lag (think Kubo robo-throttle) so he'd want to keep inlet air temps down as compactly as efficiently. IMO it'd be great to have that.

Fred, I was just explaining old-school 'doodlebug' to a young friend. With cab on & hood off the look would be there for ya during all the development/test work, .. and alterations. Would put any bodywork on no matter what/where add-ons do for now. (Didn't really think you'd start choppin' just yet. ) 'Remoting' can add to plumbing but also ease servicing. Can you get going with a cheapo point & shoot digital temp gauge, like if you're rtr & still shopping for a better monitoring setup? (don't know which happens first ..)

He can just tighten the adjuster down to 0 lash and then watch the dial indicator and the moment the rocker starts to move- check the degree wheel

and then re set the lash after finishing- my main point is that the intake valve should open before the piston reaches TDC and from his post it reads as if the cam was installed 26 * retarded.

 

[the old grind]

He can just tighten the adjuster down to 0 lash and then watch the dial indicator and the moment the rocker starts to move- check the degree wheel
..... my main point is that the intake valve should open before the piston reaches TDC and from his post it reads as if the cam was installed 26 * retarded.

Kinda reinforces my point that your 'actual' opening and Fred's point of .050" aren't necessarily the same or perhaps even relevant to each other.. yet. Position in crank degrees is thus subject to either interpretation. Rather than confuse with such details I suggested that finding the lobe center(s) could remove doubt as to whether the cam is 'in time' as it should be. That 'center' would be easy enuf to find, tho' we'd want that spec vs any presumption of which way Kubota actually derives, or defines, their IO event spec.

'Ramp' angles/durations can differ between solid & hydraulic lifter types. How about Fred tests the other timing events as well to see how they too compare to factory info? Maybe that's the way to be sure were on the same page.

 

[buickanddeere]

Actually it does. That is why an engine designed for a turbo has the valve overlap it does. It also promotes cooling of the exhaust valve.

No it don't. How pray tell are is the turbo engine going to run with less exhaust pressure than intake manifold pressure.

 

[Grateful11]

I didn't get it on the first thread about this L3940 not having any power at all and I don't get it on this one either. Our L3940 is used 365 days a year for feeding 50 head of cattle. It's not underpowered, never was from day one and now has over 700 hours on it and it's still not underpowered. I seen it load a 155 bushel manure spreader in under 5 minutes with no lack of power. I've seen it pull a CaseIH 1250 Grinder Mixer in a pinch when nothing else is available at the time. The grinder is normally run behind a 106 PTO HP tractor, you can't feed the grinder like the 106hp tractor but it will do the job. I have a video somewhere of it grinding ear corn. I'm sorry I have wonder if there's not something wrong with this tractor because as far as power ours loses traction long before running out of power. Sure it's not going pull a gigantic hill in High/High without dropping down to High/Low or dropping into Mid range. It's the handiest, most useful tractor on the farm. There's either something wrong with it or it's inexperience from the operator.

"if in Auto-HDS the tractor will shift down to low JUST by hitting the FEL lever."

That right there leads me to think there's something wrong with it. Our son loaded and stacked 725 round bales this year and I would have heard it drop back into LOW from distance if that were happening.

 

[sd455dan]

Kinda reinforces my point that your 'actual' opening and Fred's point of .050" aren't necessarily the same or perhaps even relevant to each other.. yet. Position in crank degrees is thus subject to either interpretation. Rather than confuse with such details I suggested that finding the lobe center(s) could remove doubt as to whether the cam is 'in time' as it should be. That 'center' would be easy enuf to find, tho' we'd want that spec vs any presumption of which way Kubota actually derives, or defines, their IO event spec.

'Ramp' angles/durations can differ between solid & hydraulic lifter types. How about Fred tests the other timing events as well to see how they too compare to factory info? Maybe that's the way to be sure were on the same page.

That sounds even better :thumbsup:

 

[The Fred]

I do have some questions about your Meteor though. We haven't had much snow so you shouldn't of experienced any power loss. Were you loosing power or was it more a case of it just wouldn't throw snow. If it just wasn't throwing snow then you may have an impeller clearance issue. I almost never run at more than 2000ish with my blower. Being a front mount with a mid PTO I should have less HP going to it.

LOL looks like I voided the warranty on the blower too Al. No experience with a snowblower. We had 5 inches Thanksgiving morning. I blew snow and rocks till I was blue in the face.

Are you currently using ULSD in the tractor?

NO, My fuel was bought in 1995, no crap but it works fine in every other Diesel I own. What does ULSD have to do with it?

View attachment 349416

Fred

 

[big bubba]

"NO, My fuel was bought in 1995" !!!!!!!!!!!
& all this time & $ with your expertise using 18yr old fuel? could that alone be the smoking/starting problem? cheers, best of luck

 

[The Fred]

I've tried both doesn't make any difference. Go start a thread about using old fuel.

The dealer knew this before I signed any paperwork.
Fred

 

[aczlan]

NO, My fuel was bought in 1995, no crap but it works fine in every other Diesel I own. What does ULSD have to do with it?

Your engine is a "Interim Tier4" engine is it not? (it appears to be from http://www.kubota.com/product/L40/pdf/gl40_spec.pdf ). If so, Kubota says that "Ultra Low Sulfur Diesel (15 ppm or less)" is required (per: Kubota Service Lubricant Maintenance )
Before you go further, I would try draining the tank and filling it with ULSD to see how it does then.

Aaron Z

 

[The Fred]

Aaron I have already, NO difference.

What makes you the fuel expert? Kubota manual states NO high sulfur fuel to be used with this engine. THEN in maintenance it says 200 hr. oil service interval UNLESS using high sulfur fuel then 100 hr. interval. My fuel is fine. Now we have a forum full of fuel experts.

Aaron do think all parts of the world have ULSD fuel? Highly doubtful.

Ultra-low-sulfur diesel - Wikipedia, the free encyclopedia

Like I said start a fuel thread.

Fred

 

[txdon]

Fred I checked the fuel thread and the biggest issue would be that some of the slime is restricting your fuel filter. You may not be able to see it but the flow is restricted and even though you changed fuel, did you also change the fuel filter? . . . OK I'm leaving and going back to the fuel thread, just my 2 cents in this very interesting thread.

 

[the old grind]

While synthetic oils tend to be molecules of the same length, density, or whatever crude oil is 'cracked' (separated by gravity) into groups of similar molecules that are a blend to some extent in each general category. Heavies become diesel grades, lighter are kero, gas, etc. (source: API)

I drained nasty old gas from a tractor into milk jugs and capped them for disposal. Just as the fizz can dissipate from a plastic soda bottle over time (months) there has been a smell of ether near the jug. I guess it's smaller moleculeswithin the 'blend' can seep thru' the HDPE just as CO2 seeps thru the clear stuff and alter the formula. So, what if the old diesel has lost some lighter components of its blend and rendered it to a lower grade, not thick 'bunker', but say '#3' or so over the years. I doubt sulphur would be the first to be lost, & apparently it's a non-issue here.(?) Sorry to mention fuel, again ...

Could there be something amiss with digital controls somewhere, as when an auto ECM/EEPROM is mismatched to the vehicle, or the install, and needs to be checked out on a high-end analyzer? (Wrong/defective chip, etc) I was taught in college that 'proper diagnosis is the direct way to the right fix'. There are just so many thinks to check out here and we seem to be spinning our wheels to this point. :mur:

Trying not to over-think the possibilities Fred, honest.

 

[Bluegill2]

"NO, My fuel was bought in 1995" !!!!!!!!!!!
& all this time & $ with your expertise using 18yr old fuel? could that alone be the smoking/starting problem? cheers, best of luck

This just gets more interesting everyday!

 

[Bluegill2]

Looks like a post got deleted? I was looking forward to my mickey Ds' gift certificate .

 

[milkman636]

People continually telling you how wrong you are has to get old for any one. From what I've seen here I know that your skillset surpasses mine in this arena.

If you need more info you could try using the private messaging to some of the members that have contributed good info to your thread instead of posting back here to get beat up on.

If you do drop this thread I hope that you will start another thread to show off the completed project after you get her buttoned up.