Hydraulic pumps in relation to wheel motors?

Discussion in 'Lawn Mowing' started by dozerdogue, Nov 23, 2006.

  1. dozerdogue

    dozerdogue LawnSite Member
    from CT
    Messages: 113

    My question is what are the advantages and or disadvantages to having larger pumps? For example my Grasshopper 428D has hydrogear 21L pumps but I have no idea how my parker wheel motors are rated. I assume the bigger the pump the more power they draw on the engine. What is the determining factor for speed and torque. Someone please explain the correlation between the pumps and wheel motors. Also if anyone knows what size are my wheel motors?
  2. ed2hess

    ed2hess LawnSite Fanatic
    Messages: 14,555

    I would not assume that just because the pump is bigger that it requires more power. I would guess that if you have a big pump you can pull bigger hills faster and that would require more power but the pumps should run cooler. I don't know if you can have one pump for two drive motors but if you have a bearing failure it is better to have sperate hydro systems in case debris gets loose. I guess big stuff cost more money, is that what you are worried about?

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