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  1. #11
    Silver Member erj's Avatar
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    Mar 2008
    Posts
    205
    Location
    Buckley, WA

    Default Re: Jimna low loader lift.

    Here is a picture of the gauge and where it should be located.
    2006 Jinma 284, Coldwater FEL, JW03 Backhoe, 5' Box Blade

  2. #12
    Super Member greg_g's Avatar
    Join Date
    Dec 2003
    Posts
    6,028
    Location
    Western Kentucky
    Tractor
    JD3720 Cab, 300X loader with 4-in-1 bucket

    Default Re: Jimna low loader lift.

    You may also be using hydraulic fluid that is too thick and/or contaminated. Many owners have drained/flushed the horrid stuff that comes with the tractor and replaced it with proper AW32/ISO32 hydraulic fluid.

    //greg//
    USN (Ret)
    Former Chinese tractor owner (x4)
    Current John Deere owner

  3. #13
    Platinum Member
    Join Date
    Nov 2008
    Posts
    802
    Location
    US Virgin Islands
    Tractor
    Jinma JM304

    Default Re: Jimna low loader lift.

    You can get a gauge from Bailey's Pressure Gauges or other hydraulic supply. Or probably from one of the dealers who advertise here. The pressure relief valve is located in the loader control valve. On the old style Jinma control valve it is the larger protuberance on the bottom of the valve block. If you take it apart, be aware that it is under spring pressure and stuff may go flying of you're not watching. Don't mess with it until you have a pressure gauge installed though, and check what the parts manual shows before tearing into it. If in doubt about your abilities, get help from a pro - hydraulics aren't mysterious but they can be dangerous to the uninitiated.

  4. #14
    New Member
    Join Date
    May 2013
    Posts
    8
    Location
    Rigby, ID
    Tractor
    Jimna 284

    Default Re: Jimna low loader lift.

    Thanks, this is great.
    Do you happen to know what size and thread pipe it is?

    My hydraulic fluid is fine, I replaced it.

  5. #15
    Elite Member RonMar's Avatar
    Join Date
    May 2005
    Posts
    2,760
    Location
    Port Angeles WA
    Tractor
    Jinma 284 delivered 06/28/05

    Default Re: Jimna low loader lift.

    Quote Originally Posted by runfastman View Post
    Thanks, this is great.
    Do you happen to know what size and thread pipe it is?

    My hydraulic fluid is fine, I replaced it.
    But what did you replace it with? AW-32 hydraulic oil, or UTF?
    Ron

  6. #16
    New Member
    Join Date
    May 2013
    Posts
    8
    Location
    Rigby, ID
    Tractor
    Jimna 284

    Default Re: Jimna low loader lift.

    Quote Originally Posted by RonMar View Post
    But what did you replace it with? AW-32 hydraulic oil, or UTF?
    "Tractor Hydraulic Fluid". What they guy said at the C-A-L Ranch store.

  7. #17
    Platinum Member
    Join Date
    Nov 2008
    Posts
    802
    Location
    US Virgin Islands
    Tractor
    Jinma JM304

    Default Re: Jimna low loader lift.

    In your location, I think I'd want AW-32 hydraulic fluid instead. I just don't have much faith in those "universal" fluids.

  8. #18
    Veteran Member Bob Rooks's Avatar
    Join Date
    Feb 2007
    Posts
    2,269
    Location
    Bothell & Silverdale, WA
    Tractor
    Yuchai Bulldozer

    Default Re: Jimna low loader lift.

    Quote Originally Posted by runfastman View Post
    "Tractor Hydraulic Fluid". What they guy said at the C-A-L Ranch store.
    And the guy in the ranch store got his lubrication engineering degree where?
    Yuchai 306R dozer, Mustang 2040 skid steer, Mitsubishi MS035 Mini-Ex with four buckets and a rake, Trimble equipped 7' Dual Dozer with twin GCR-2 laser receivers, and a LiTW BH7600 back hoe (sold).

  9. #19
    Super Member greg_g's Avatar
    Join Date
    Dec 2003
    Posts
    6,028
    Location
    Western Kentucky
    Tractor
    JD3720 Cab, 300X loader with 4-in-1 bucket

    Default Re: Jimna low loader lift.

    Quote Originally Posted by runfastman View Post
    "Tractor Hydraulic Fluid". What they guy said at the C-A-L Ranch store.
    That stuff is formulated for common sump tractors where gear boxes and hydraulics share the same fluid. Yours has separate sumps, meaning two different kinds of fluid; gear oil and hydraulic fluid. In your case, THF is too thick for the hydraulics and too thin for the gears. Drain and refill the hydraulics with AW32, If you don't see AW32 locally, ISO32 is the same thing. To be safe, you might also want to drain the gear boxes and differentials as well, and refill them with 80W90 gear oil.

    //greg//
    USN (Ret)
    Former Chinese tractor owner (x4)
    Current John Deere owner

  10. #20
    Elite Member RonMar's Avatar
    Join Date
    May 2005
    Posts
    2,760
    Location
    Port Angeles WA
    Tractor
    Jinma 284 delivered 06/28/05

    Default Re: Jimna low loader lift.

    What Rich, Bob and Greg said. "Tractor Hydraulic Fluid" or "Universal Tractor Fluid" is too thick for a simple hydraulic system. It is closer to 30wt motor oil and is designed for hydrostatic drive transmissions. This is why you get the slow response/need to warm up before the hydraulics all work correctly. Your hydraulic pump was designed to make pressure, not pull suction, and it is way more difficult to pull that thicker fluid thru the feedpipe from the sump than it would be to pull a much thinner AW-32 hydraulic fluid...
    Ron

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