Kubota L5240 increase to L5740 hp

[KUBOTARANCH]

I saw a few threads about L5240 & L5740 hp the only difference is maybe a turbo setting. Does anyone know if thats all it is? Any instructions on how to boost it up as the engines are the same. Thanks

 

[TripleR]

I don't remember ever seeing a definitive thread, some claim the difference is due to the 5740 turning more RPM's. I had an L5030 before my L5740 and so far haven't run into anything the 5740 does better power-wise. I would have bought an L5240 or L5740 and don't see the power difference significant; maybe I am missing something.

The M8540 and M9540 are the same tractor and we bought the M8540, never ran into a situation where I have missed the extra HP.

 

[KUBOTARANCH]

I am in the process of buying a Rhino TS12 brush cutter. it needs 35 to 60 pto hp. The 5240 is just near the lower end at 45. Wanted to get more hp out of it, I have steep hills and heavy brush. Your thoughts?

 

[TripleR]

Yeah, you "may" need the extra HP, all I pull with mine is a 6' Land Pride RCR2672, we have hills, but probably not as steep or long as you and hill s sure make a difference. On our M8540 pulling a Woods DS1260, on a really steep section, I will use the foot throttle to boost the RPM's up, it has plenty of power, but the hill will sure be noticeable.

buppies has a L5240 and foremanEtexas pulled a bat wing with his M5040, so you might check with them as to power.

That is a very nice looking cutter.

 

[90cummins]

There are slight differences in the engines, the L5240 is a 145ci engine rated 54hp @ 2600rpm & the l5740 is a 148ci engine rated 59hp @ 2700rpm.
As you said everything else appears the same.
You are talking about a 10% difference at the PTO.
I doubt you will notice the difference or lack of 5hp cutting brush.
But having said that you can certainly turn up the fuel rate to get that 5hp or more if you really feel you need it.

I installed a turbo on my Ford 1720 SSS cut a couple years ago and the results far exceeded my expectations.
If you decide to turn the fuel up install a turbo boost guage first & record the max boost under load before making any adjustments. Then record the max engine rpm under no load.,
Note that there are 2 adjustments 1 is for the fuel rate (torque) and the other is for the max engine rpm. The fuel screw is the one you would want to adjust.
I hope you do turn it up & post results.

 

[Bashlin]

There are slight differences in the engines, the L5240 is a 145ci engine rated 54hp @ 2600rpm & the l5740 is a 148ci engine rated 59hp @ 2700rpm.
As you said everything else appears the same.
You are talking about a 10% difference at the PTO.
I doubt you will notice the difference or lack of 5hp cutting brush.
But having said that you can certainly turn up the fuel rate to get that 5hp or more if you really feel you need it.

Same C.U. 148.5.....Same Motor on the 5040-5240-and 5740. Dealer said they up the RPM's on the higher horsepower, but I'm not exactly sure??

 

[MHarryE]

Look at the Kubota engines web site for the V2403-M-T-E3B engine. It is a very close match for the engine used in the L5740. Power specs are identical to those advertised for the L5740 engine, 59 gross HP at 2700 rpm, etc. If you look at the power curve, note that it drops from 44 kW at 2700 to about 42.5 kW at 2600 or about 57 HP. So it is not as simple as just lowering the top speed. The fueling map is also modified. Can the fuel injection pump be adjusted to the same fuel map? Probably. Is there something else in the engine that changes? Unlikely. Japanese production methods strive for commonality. Is there another component in the power train that is not quite as robust? That is always a possibility. I have an engine used in 2 machines, one at 156 HP and the other at 175 HP. The only difference is the software flashed in the ECM. The higher horsepower engine, however, has one of its three hydrostatic pumps rated for higher capacity than on the lower power version. Run the high power engine with the lower capacity pump and it will have greatly reduced life. That might be a risk you take by buying the lower cost tractor and turning up the wick so to speak. On the other hand, they may be truly identical except for the pump setting and Kubota may be pricing based on power alone raking in more profit from all of us who have a Tim Taylor personality and need more power (I have a L5740). Our engine supplier, another division of the same mother company, does that to us. Our transfer price for the 2 engines I mentioned is significantly different although the engines are identical except for software. It is market based pricing.