Mahindra 2216 vs Max 28XL

[BentProp]

I have a 2216 gear rated 17.5 pto hp. The 28xl shuttle is rated 23.5 pto hp. Turning a 48" tiller or 4' bush hog, will I see a substantial difference? In other words... would it be worth the upgrade? Also, with the 28xl shuttle, does the pto disengage when changing gears/speed or from forward to reverse? The 2216 is my first tractor so Im still new to all this stuff.
Thanks!

 

[DavesTractor]

The Max28 shuttle has a transmission driven PTO. When you stop the tractor movement, the PTO stops. Tractors were built this way forever and we all got along fine, but there is no doubt that independent PTO is nicer to operate. The Max28 shuttle is the only current Mahindra that does this. All the other gears/shuttles have an independent PTO, and of course all the HST units are independent by nature. As to HP, you will notice the difference for sure. For tilling, I recommend an HST.

 

[knukey]

I'm confused about the engines and power ratings on these units. How come the 2015 and 2216 use the exact same engine (per Tractordata) and have different ratings? My 2015 shows the same PTO hp as the 2216.

Mahindra 2216 Power:
Engine: 22 hp [16.4 kW]
PTO (claimed): 16 hp [11.9 kW] (hydro)
17.5 hp [13.0 kW] (gear)


Mahindra 2015 Power:
Engine: 20 hp [14.9 kW]
PTO (claimed): 17.5 hp [13.0 kW] (gear)
Bore/Stroke: 3.071x3.091 inches [78 x 79 mm]
Power: 20 hp [14.9 kW]
Fuel system: indirect injection
Compression: 22:1
Rated RPMs: 2500
Starter volts: 12

 

[DavesTractor]

This is common in the tractor industry. Any given engine can have it's horsepower manipulated a little by reading it at a little different RPM (makes a huge difference), or by how the factory adjusts the FIP, or by if it has a turbo, or if it has a turbo with intercooler, etc. On the 2015, it is my contention that it did and always has put out 23 engine HP, which is also what we figure the 2216 puts out via our dyno and what the same engine is rated when used in many industrial applications.

The industry does this in some full size utility tractors as well. They might have a 55/65/75 HP tractor series, all with the same basic engine.

Absent a turbo, I like to see larger displacement and slower RPM. Maybe just a personal preference, but it seems to be a better idea to run a bigger diesel a little slower than to scream a little engine to make the HP. Take a Max25, it has 80.4ci/1318cc and is rated at 2500 rpm at 25 HP. A Kubota BX25 is 54ci/898cc and rated at 23HP at 3200rpm. The BX2660 is 61ci/1001cc and is rated at 25.5HP at 3200 rpm. Obviously Kubota makes good stuff and has designed the engines to handle the higher rpm, but I prefer the way Mitsu does it.

 

[79tomato]

Would higher RPM mean more heat generation?

 

[DavesTractor]

Would higher RPM mean more heat generation?

Yes, but of course more cooling could be added to the system to offset that. More noise also, but again you can attenuate that some with mufflers and sound deadening product in the right spots. More wear on water pumps, alternators, hydraulic pumps, etc. All can be engineered to handle higher RPM and you can be sure that Kubota hasn't dropped the ball on this, they build good stuff. But if we can run a little larger engine at a lower RPM, that seems like a good idea to me.

 

[BentProp]

Both 2015 and 2216 have a Mitsubishi S3L 24hp engine. At 2356rpm it produces 17.5hp and turns the pto at 540rpm. 2500rpm produces 20hp. 2750rpm produces 22hp. 3000rpm produces 23.9hp. Assuming it takes a comparable amount of hp to make the wheels on you tractor lose traction and spin (when push/pulling a load) as it does my 2216, they will do equal work. That extra 2hp I have is worthless because I cant use it where I need it - at the pto turning 540rpm. Just means my wheels spin a little faster than yours. Of course this is true only if variables are eliminated... gross tractor weight equal, load equal, etc... It would be nice if these engineers would gear these things to put available hp at the pto instead of having excess hp spinning the wheels doing no work at all. Sure, you can adjust the governor to get 24hp at 3000rpm as the engine is designed to do, but your still getting 17.5hp while turning the pto at 540rpm(2356 engine rpm). As an example, yanmar has a 29hp engine that produces about 25hp at 2350rpm. This engine would give you 25pto hp turning the pto at 540rpm. The rest is just for spinning the tires.

Mack Boring & Parts Company - Reliable Power. Everywhere.
click on the S3L Series Technical Data link.