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  1. #1
    Bronze Member
    Join Date
    Feb 2005
    Posts
    55
    Location
    Goldendale,Wa
    Tractor
    Jinma 354 fwd

    Default replace hydraulic pump

    I want to replace the hydraulic pump on my Jinma 354 with a E-320 hydraulic pump. Will the increased flow result in a higher pressure on the system
    so that I will have to adjust my relief valve? It is set at 2350psi now and everything works good but a little slooooow.

    Thanks , Jinmared

  2. #2
    Veteran Member Bob Rooks's Avatar
    Join Date
    Feb 2007
    Posts
    2,234
    Location
    Bothell & Silverdale, WA
    Tractor
    Yuchai Bulldozer

    Default Re: replace hydraulic pump

    Quote Originally Posted by jinmared View Post
    I want to replace the hydraulic pump on my Jinma 354 with a E-320 hydraulic pump. Will the increased flow result in a higher pressure on the system so that I will have to adjust my relief valve? It is set at 2350psi now and everything works good but a little slooooow.

    Thanks , Jinmared
    The only effect the higher volume pump will have is that you will reach the relief valve set point much sooner.
    In other words, no, it will have no effect on pressure.
    Yuchai YCT dozer, Mustang 2040 skid steer, Mitsubishi MS035 Mini-Ex, Trimble equipped 7' Dual Dozer, and a LiTW BH7600 back hoe for sale.

  3. #3
    Elite Member RonMar's Avatar
    Join Date
    May 2005
    Posts
    2,733
    Location
    Port Angeles WA
    Tractor
    Jinma 284 delivered 06/28/05

    Default Re: replace hydraulic pump

    Quote Originally Posted by Bob Rooks View Post
    The only effect the higher volume pump will have is that you will reach the relief valve set point much sooner.
    In other words, no, it will have no effect on pressure.
    That is correct, provided that the relief valve is rated to pass the additional flow volume. If it cannot pass the increased flow, the pressure will rise...
    Ron

  4. #4
    Elite Member SPIKER's Avatar
    Join Date
    Jun 2002
    Posts
    4,026
    Location
    Ohio, Jeromesville, Ashland County
    Tractor
    Jinma 284

    Default Re: replace hydraulic pump

    The Increased FLOW will also make things operate FASTER at the same RPM so you may end up having more JERKY movement on a FEL if the valve does not have a good angle on the spool opening.

    Mark
    I may remember why I went to the other end of the shop, I'm just afraid once I get there I'll forget how to get back!

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