Deere 1023E Vs. Kubota BX1880

[jgillott]

Ok, still haven't purchased anything. But, talk to me about Yanmar sub compacts. A new dealer in Mt. Pleasant Pa just became a dealer. 10 min from the house and I pass it every day going to work. That's enough to spark my interest.

 

[TFucili]

Yanmar makes good stuff. Avoid gray market stuff, though. When I was a dealer pretty much all Deere compacts were Yanmar. Don't know about today. Resale won't be as good as Deere or Kubota.

 

[MarkEagleUSA]

Not sure what your financial situation is like but www.kubotausa.com has some sweet financing deals going on through the end of June. Their L series "landscaper" package has caught my attention (even if it is more tractor than I need).

 

[NIsaacs]

This little guy showed up today on a D-Max The guy said he is having good luck with it. He said he has been hauling for 13 years, first truck was a new dually Dodge and got rid of it after 700k miles. Second one was another Dodge dually but used, and it was no good, this truck is doing good.

'09 John Deere 4320 with a 48 hp John Deere turbo diesel. It appears to be a common rail with no emissions that I can see. Already did a service on it.

 

[jgillott]

Very nice. Congratulations

 

[TFucili]

Nice! What trans is that? TSS? Is that an 870 to the right?

 

[NIsaacs]

Thanks, guys. 970 4x2 on the right, it has the little Yanmar 1.8l 4 cylinder, 33hp, it has 9600 hours on it. The 4320 has E-Hydro, hydrostatic transmission with 3 ranges.

 

[jgillott]

9600 hours is darn good on that little Yanmar.

 

[NIsaacs]

'09 John Deere 4320 with a 48 hp John Deere turbo diesel. It appears to be a common rail

After taking a good look, I didn't see any high pressure pump or injector lines, so I looked in the parts book. It shows a camshaft driven, single injector pump, per injector. What the heck kind of system is that?

 

[JR]

Yep, one pump per injector driven off the camshaft and timed with a rack. Really old tech for a newer tractor.

 

[Wayne M.]

Aside from the mechanical rack, which is fine in my book, a unit pump setup like this is very popular, even today. Mack E7 Etec used it, and I believe Isuzu still uses it. If you consider this the same idea as a rocker actuated, in head unit injector, then all the Volvo/ Mack, DD series60, and many other engines use this tech right up to today as an alternate to common rail.

 

[NIsaacs]

That's interesting, I had not ever seen one. I am familiar with the Detroit type. It starts instantly, hot or cold, but it seems the rack is relaxed and starts at wide open throttle for a second. That bothers me some. Is that normal?

 

[JR]

My question would be why still use these types of fuel systems? My experience with this type is limited to Deutz 1000 series engines and they had their share of problems. Specifically the pumps wiping out the cam lobes. You had to have a lot of specialty tools just to time the pumps. Alignment dowels, a crank dolly, and a belt tension gauge to tension the timing belt to ensure proper timing right off the top of my head. Maybe the newer systems are less involved but the Deutz was overly complicated for my simple natured mind. IMO, More moving parts equals more failures down the road. I just don't see the benefit of using what I consider an antiquated system.

 

[jgillott]

There is a Standyne pump on mine. Is yours similar?

 

[fest3er]

Is it a MUI (akin to Ford's HEUI)?

 

[Wayne M.]

I don’t know MUI, but Ford, IH, and Cat’s HEUI systems all work the same. It’s engine oil pressure used as a slave to pressurize the fuel and inject it. It was a decent interim technology.
I will dig out my E7 book and snap a few shots. That will explain unit injection pretty well.

 

[Wayne M.]

Below is the Mack E7 cam/ lifter/ Unit pump setup. 4 is a valve lifter, 3 is a rollerized “bucket” that the unit pump, 11 drops into. The unit pump has its own eccentric timed to make the nozzle inject at the proper moment.

Below you can see the #6 unit pump by the turbo down tube, it has 2 wires on it, and basically acts as the rack. There is a line from the pump to crossover tube in the head, that seats into the nozzle much the way our Cummins engines do.

 

[Wayne M.]

That's interesting, I had not ever seen one. I am familiar with the Detroit type. It starts instantly, hot or cold, but it seems the rack is relaxed and starts at wide open throttle for a second. That bothers me some. Is that normal?

It’s probably normal. It’s probably how the governor controls the rack.

 

[TFucili]

Wayne, back when Mack was having lots of cam issues, which I have been told were really caused by the lifters, was it valve lifter related, or unit injector related???

 

[Wayne M.]

Wayne, back when Mack was having lots of cam issues, which I have been told were really caused by the lifters, was it valve lifter related, or unit injector related???

Yes Tom, out of the thousands of E7’s we had, Ive seen and heard of these cams wiping out, and the ones I’ve personally seen were the pump bucket rollers failing. When the pump seizes, the 2 hold down bolts act as a fuse and they snap. I’ve changed a few pumps in my time.