Engine RPM's

Ryeder

New member

Equipment
B2650 hsd
Feb 10, 2022
9
1
3
NH
Have an issue I can't figure out. And the answer is probably simple or so I hope.
2018 B2650.
I raise the bucket high and the engine's RPMs lowers. I drop the bucket and the RPMs return to normal. Any ideas?
 

Mitjam

Well-known member

Equipment
M-108, M6-111, Lx3520, Rtv-520 and LandPride implements
Jan 14, 2013
283
298
63
Edmonton, Alberta, Canada
Have an issue I can't figure out. And the answer is probably simple or so I hope.
2018 B2650.
I raise the bucket high and the engine's RPMs lowers. I drop the bucket and the RPMs return to normal. Any ideas?
Sounds like normal operation to me. When your lifting the loader it’s drawing from your hydraulic pump which in turn will put load on your engine especially at lower rpms. If your at end of the rams stroke or full lift there is no where to fluid to go it’s dead heading and you will really notice it then. When you lower it under its own weight the fluid is returning to sump or back to tractor. Which doesn’t require any power. Hope this helps or what you were asking for
 
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Nicksacco

Well-known member

Equipment
Kubota L35 TLB, 2014 RTV-1140CPX
Sep 15, 2021
693
406
63
Bahama, NC
When raising the bucket (loader??) it would be normal to have an rpm drop that recovers when lowered. Especially if your starting at a very low rpm. The pump would drag the engine down a bit.

But from your description not clear of all the details.
 
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Ryeder

New member

Equipment
B2650 hsd
Feb 10, 2022
9
1
3
NH
Sounds like normal operation to me. When your lifting the loader it’s drawing from your hydraulic pump which in turn will put load on your engine especially at lower rpms. If your at end of the rams stroke or full lift there is no where to fluid to go it’s dead heading and you will really notice it then. When you lower it under its own weight the fluid is returning to sump or back to tractor. Which doesn’t require any power. Hope this helps or what you were asking for
Thanks... normal is good.
 
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MapleLeafFarmer

Well-known member

Equipment
Lots incl. B and L kubotas
Dec 2, 2019
668
551
93
E.
Have an issue I can't figure out. And the answer is probably simple or so I hope.
2018 B2650.
I raise the bucket high and the engine's RPMs lowers. I drop the bucket and the RPMs return to normal. Any ideas?
How much weight is in your bucket and what are the starting rpms?

If you are lifting significant weight and starting at lower rpms then this may be normal as your are lugging the engine if change deemed significant.

But if experiencing this with little or no weight and significant rpm you might be experiencing a problem like something bent or binding.


More info needed imo. Including where in the stroke cycle. You are in.
 
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Ryeder

New member

Equipment
B2650 hsd
Feb 10, 2022
9
1
3
NH
How much weight is in your bucket and what are the starting rpms?

If you are lifting significant weight and starting at lower rpms then this may be normal as your are lugging the engine if change deemed significant.

But if experiencing this with little or no weight and significant rpm you might be experiencing a problem like something bent or binding.


More info needed imo. Including where in the stroke cycle. You are in.
Bucket weight has little difference with the RPMs lowering. As far stroke position, RPMs reduce about 2/3 of maximum.