- Mar 5, 2004
I was looking over Kubota engine specs and found the torque and horsepower charts interesting. My 773 has the V2003TE engine making a peak HP of 56 with a torque of 106 ft.lbs. at 2800 RPM. The max engine torque of 121 ft.lbs. is made at ~1700 RPMs at 38 HP. I normally run the engine at 2650-2700 RPM to help conserve fuel and reduce engine wear, but could probably run at 2550-2600 RPM without much loss of performance.
The V3300TE engine used in larger machines makes a peak HP of 83 HP and ~170 ft.lbs. of torque at 2600 RPM. Max engine torque of ~210 ft.lbs. of torque is made at ~1575 RPM at ~58 HP.
I know the hydraulic pump most likely makes the most power (flow and pressure) available from the highest RPMs possible, but the engine should work best at it's peak torque RPM (most force available to do the work). It looks like pressure and power from the hydraulic pump have linear increases, which correspond directly to increased RPM. Since the skidsteer loaders are hydrostatic drive and have hydraulic attachments, they would benefit most from increased flow and pressure of the higher RPM.
What RPMs does everyone else run their machine at? If lower than max RPMs, please state how much lower because each engine has a different max RPM.
Do you think running at lower RPMs will decrease wear on your engine and extend the life?
Is it OK to run at max engine RPMs all the time?