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Veteran Member
It's a volume per revolution, FYI.I have a L39TLB with a Loftness 60" snow blower on the SSQA. Get the motor model number and find the Cu in displacement. You can determine the speed of blower impeller by that displacement and your gpm hydraulic supply. I have up to 9 gpm and at first , mine would not throw the snow very far... but worked. With research, I found Loftness offered it with a smaller motor. So I replaced mine from 4.9 to 3.6 cu inch. Now it rotates faster with same oil flow. Snow blower success is all about impeller speed.
With a smaller displacement, under the same load you'll have a higher pressure. Or, with a limited pressure it'll handle less load. It's a balancing act, between flow and pressure (and that's when you control the pump and motor----you have no control over the pump).
It's analogous to a gear ratio.
For whoever cares.