Kubota B2650 and B3350 info and hints

[ericdube]

With 13.5 hours on the tach, by B3350 started blinking the "regen light" so I pushed the "auto regen" button. The regen process took longer than I expected, almost half an hour, during which time I ran it at full throttle, 2500 rpm, and used the backhoe. During that first 13.5 hours, I tried to operate at moderate engine speeds and avoided idling for more than a few minutes. Still, to minimize PM in the DPF, it's better to run it at higher power settings . . . while the manual says not to do that during break for the first 50 hours.

I've ordered all the parts and bits from Surplus Sales to install the hydraulic deflector on my B2782 snowblower. Only thing I'll fabricate are the mounts for the cylinder.

bumper

That's really interesting. There must be a smaller DPF on the B-series than on the L60 series. I've got 32 hours on my L4760 already, and I believe my DPF reading is still hasn't reached 40%.

Did you notice any real difference with the operation of the machine during the regen? While I haven't been through a regen on the L60 yet, I didn't notice a difference with Kubota's excavators and I just went through a regen over the weekend with the KX040-4 (took probably less than 20 minutes to complete and I wouldn't have known it was happening if I didn't see the warning message on the operators panel.)

I hope the B3350 is working out for you. That's a great tractor, and I almost bought one myself.

 

[bumperm]

The DPF on the B3350 is a cylinder, flat ends, maybe 7" diameter and 14" long (that's a rough guess). In any case there's not room for anything bigger as the little engine compartment is well packed. Instrumentation is more sparse than on the L4760 - - there's no display of DPE % blockage, just a light and buzzer to advise when regen is needed if the operator has not selected "auto regen".

During and before regen, tractor functionality seemed unchanged. Leading up to the event, the only hint that it would soon be time was the "lag" on starting before the engine smoothed out and ran on all four. This changed from a couple of seconds to 6 or 7 seconds sounding a bit like a radial engine on start up.

bumper

 

[2010drive]

Bumper,

Have you started yours in cold weather yet? I know you store yours at 60 degrees but have you left it outside long enough for a cold start?

About a week ago I started mine in the 30's primed for 5+ seconds throttle halfway and it chugged along for a few seconds and then died, started it back up and it was fine. Same thing happened today at 20 degrees.

 

[2010drive]

Also my floor mat has cutouts for the wire's going into the dash for all but 1 area, is your's like this?

1st pic is drivers side second is passenger side.

 

[bumperm]

My floor mat and wiring look identical to yours.

I finally started my B3350 in the cold, probably around 34 degrees. Mine did exactly as yours, chugged along for 5 or 6 seconds with no indication that it was speeding up to go smooth - - then died. Repeated glow plug warm up again and it chugged for just a few seconds and ran smooth. Frankly, I'm not real happy with this "feature" of the tractor. Also, I tend to run the engine at higher RPMs than one would run a non-DPF equipped tractor so as to avoid loading up the filter so quickly. This is frustrating, as often a lower RPM would be more appropriate for the work at hand.

With the EPA clamping down and heavily fining the "DPF delete" companies that were selling to the diesel truck crowd, I don't suppose anything like that would become available retail. However, it looks like it would be simple enough to do. Machine a flange, have a car muffler place mandrel bend a new pipe, weld on the flange. Result would simply replace DPF. I don't think Kubota uses anything sophisticated like the OBDII compter used on autos. I'm assuming two of the three sensors are differential pressure to measure PM loading, and the other is doubtless a temperature sensor. Just rambling . . . I'll probably leave it be at least until warranty is up.

bumper

 

[Paystar]

I was wondering that myself, if any of the delete manufacturers will jump into the compact tractor market.
Or if the B2650 could be turned up a bit.

 

[bumperm]

While the B2650 and B3350 are "mostly" the same tractor, the engine isn't, as the 33's has four cylinders and a turbocharger against the normally aspirated three cylinders on the 26. I think the block is extended on the 33 as the bore and stroke are the same. I'm guessing the turbo was needed to help force air into the DPF strangled engine. Other minor differences include indicators, switches etc., most of those related to the DPF. The 26 also doesn't have the "parking brake on" warning light like the 33 . . could be wrong on this though.

For the most part, dealers I've talked to are not up to speed on the B3350's nuances. There's also not much of an owner pool or info on-line yet, "2010drive" and myself being the only two owners posting.

No "DPF delete" manufacturer, at least in the US, will likely be foolish enough to jump into the fray after the EPA fined one hapless maker of pickup truck kits $500K and required them to refund money any customers who asked (although I bet there weren't many takers on that offer).

The jets overhead are burning millions of gallons of jet fuel (basically the same a diesel) with no emission controls whatsoever and our misguided government is picking on little tractors.

bumper

 

[2010drive]

Do you think the wires that don't have a cutout for them in the mat are for the third function valve? I believe that is a dealer installed option so that would explain why the factory mat doesn't have cutouts.

I started mine today in the mid 30's, this time it chugged like normal and then went to 1400RPM. I raised the lever to try and lower the RPM's to 1200-1300RPM which is where I usually have it during warm up, but it continued to stay at 1400RPM even with the lever in the idle position. Once it reached 1 (one) bar on the coolant gauge it went back to functioning as normal.

I will do another cold start on Saturday and see if it does it again.

 

[2010drive]

I don't think the DPF removal will be as easy as it seems. I'm guessing it would recognize it's missing the DPF and at least show a warning light, possibly a ruff idle, or even shutting down completely.

It's probably not as complicated as on the trucks but I bet it's not as simple as removing it. I am interested in seeing the results though

 

[Paystar]

Ya Bumperm.....a bunch of them got caught and fined but it hasn't seemed to have slowed them down. They are still openly advertising them in all the magazines. There is even a whole bunch of shops advertising in all the trucking trade magazines to do DPF/EGR removal and ECM programming on class 8 trucks.

Wish I could figure it out on these tractors.....bet I'd have a good cash business going, LOL.