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pto speed

Discussion in 'Country and Rural Living' started by kenpat, Apr 23, 2012.

  1. kenpat

    kenpat New Member

    Apr 25, 2010
    I have a iseki 1502 tractor it has 500 and 1000 speeds for the rear pto, I mow with a woods finish mower 5 foot, which speed should I use.. thanks Ken
  2. tractor beam

    tractor beam ENGLISH SPRINGER SPANIELS Staff Member

    Jan 25, 2010
    Priest River, Idaho
    Welcome to the forum Ken! The mower is designed most likely for the 500+ rpm setting, however, you could use the 1000 rpm setting with reduced engine speed to conserve fuel.

  3. Mickey

    Mickey New Member

    Aug 14, 2010
    Is the low PTO speed 500 or 540 rpm which is a std?

    Not that I'm advocating the use of only the 5x0 rpm but The use of the 1000 rpm will most likely not save on fuel. The only potential savings would be from reduced load on the engine from frictional losses and losses in the alt and water pump between the 2 different engine speeds. The other side is you might even use more fuel depending upon where on the torque curve you are and what the slope of the curve is. Engines are most fuel efficient at peak torque.
  4. rocket

    rocket New Member

    Apr 10, 2012
    I'm thinking if you use 1000 PTO rpms and the next gear up from normal, say 3rd instead of 2nd, but at reduced engine revs, could give some fuel savings.

  5. Country Boy

    Country Boy Bovi-Sapiens

    Mar 18, 2010
    Its going to depend on what shaft the unit comes with. A 540 PTO won't fit on a 1000 and vice versa.
  6. rocket

    rocket New Member

    Apr 10, 2012
    Why would a tractor come with dual speed PTO, if the shaft won't fit both?

    And if that's the case, I'd say there would be adapters around to adapt a 540 to a 1000 shaft.

  7. Country Boy

    Country Boy Bovi-Sapiens

    Mar 18, 2010
    If the PTO is a dual speed model, sometimes you need an adapter, and sometimes you remove the PTO shaft and flip it around and reinsert it (JD does the latter). My 574, 766 and 1066 have two PTO shafts, one for each speed. The shafts are different to keep people from hooking the implement to the wrong speed shaft. Running a 540 unit at 1000 RPM can be dangerous and will likely damage the machine. The 540 shaft is coarse splined, and the 1000 shaft is very fine splined.
  8. rocket

    rocket New Member

    Apr 10, 2012
    Thanks for that Country Boy.

  9. Paul5388

    Paul5388 Registered User

    Oct 8, 2007
    The Woods RM 42 I have says to use the second speed on a Satoh Beaver, which has a 3 speed PTO. I have to install a PTO conversion unit to make the PTO turn the proper direction and provide a 1 3/8" splined shaft commonly used with 540 rpm PTOs. Usually, the 540 rpm speed doesn't provide enough momentum to work well with small HP tractors, they need more momentum to keep things cutting.


    BTW, the Satoh Beaver is only 15 HP, which should be similar to the Iseki's HP rating.