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: