Lift Capacity 4010 versus 4020

I see a 4020 and 4320 both have a 3 point lift capacity (24" rearward) of 3750 lbf. How does a 4010 compare to that?

thanks,
 

I think since 3 pt hitch & rockshaft are similar with same stand-by pressure but 4010 has smaller rockshaft piston seal(3.185 OD) while 4020 has piston seal(3.502 OD) therefore 4020 will lift more weight but how much I don 't know
 
Using your diameters the area of the 4010 piston would be 17% less than that of the 4020. If everything else in the system is equal (basically pressure and geometry) this same
reduction in piston area in theory should carry through to the lift force to give a value of 3100 lbs for the 4010. What we don't know is what the limiting factor is for the
3750 lbs rating the OP shows for the 4020. If it was limited by something other than pure lifting force, such as fore/aft stability, then the math won't tell us the whole story.
 

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