Page 3 of 4 FirstFirst 1234 LastLast
Results 21 to 30 of 38
  1. #21
    Super Star Member J_J's Avatar
    Join Date
    Sep 2003
    Posts
    18,923
    Location
    JACKSONVILLE, FL
    Tractor
    Power-Trac 1445, KUBOTA B-9200HST

    Default Re: JW-03 Backhoe Problems

    RonMar ,

    Can you post pictures of the check valve and circuit description/diagram. I have never seen this either. I don't really see the need for an input check valve because the fluid from a cyl will exit to the tank port, unless the valve pools are leaking. Perhaps bad cyl seals.

    Just install a hyd gage and trouble shoot the problem.

    Are the hoses to the BH connected correctly. Not reversed?

    The pump would not care if the valve was leaking. It would just have to work against the back pressure.
    J.J.

    When I works, I works hard. When I sits and thinks, I goes to sleep.

    Git er done.

  2. #22
    Super Star Member J_J's Avatar
    Join Date
    Sep 2003
    Posts
    18,923
    Location
    JACKSONVILLE, FL
    Tractor
    Power-Trac 1445, KUBOTA B-9200HST

    Default Re: JW-03 Backhoe Problems

    Just about all loader/BH valves have load checks, to prevent the load from shifting when shifting spools.
    J.J.

    When I works, I works hard. When I sits and thinks, I goes to sleep.

    Git er done.

  3. #23
    Elite Member wdchyd's Avatar
    Join Date
    Apr 2010
    Posts
    2,876
    Location
    Hooksett, NH
    Tractor
    Kubota B2320

    Default Re: JW-03 Backhoe Problems

    Just the fact it's Chinese it could be any number of things going wrong on this hyd system......
    2010 Kubota B2320 FEL & BH65
    If it ain't fixed don't broke it!

    http://www.tractorbynet.com/content/...-month-wdchyd/

  4. #24
    Elite Member RonMar's Avatar
    Join Date
    May 2005
    Posts
    2,871
    Location
    Port Angeles WA
    Tractor
    Jinma 284 delivered 06/28/05

    Default Re: JW-03 Backhoe Problems

    Quote Originally Posted by J_J View Post
    RonMar ,

    Can you post pictures of the check valve and circuit description/diagram. I have never seen this either. I don't really see the need for an input check valve because the fluid from a cyl will exit to the tank port, unless the valve pools are leaking.
    Here you go. I should have looked at this before I started posting on this problem... I drew this diagram a few years back when I got the BH, to get my brain around how it worked. The diagram in the chinglish manual did not represent it very well. I missplaced the location of the check valve in my head(nothing new there. The check valve is not on the valve input, but on the input to the pressure gallery that feeds the spools. In this position it acts as a single load check... If you use one function at a time, the pump has to provide more pressure than the cylinder currently has on it to move(no uncommanded movement).

    Based on this, I believe the OP has a leak in a spool valve, that is allowing pressure to leak past when he activates the boom up command. The fluid takes path of least resistance instead of building enough pressure to lift the boom. This is the same as would happen if you tried to use boom up with another command. This could be a bad seal on a spool, or could be as simple as a spool not centered due to slop in it's linkage to the control handle... Or it could be a leaky relief valve coupled with a leaking check ball... A pressure gauge will tell you more...

    Ron

  5. #25
    New Member
    Join Date
    Aug 2010
    Posts
    23
    Tractor
    John Deere 790

    Default Re: JW-03 Backhoe Problems

    I went ahead and took apart the whole prv and I found a chewed up O ring on one of the pieces. I put a new one on and put it back together and presto, it works. Thanks for all your help guys!
    2007 John Deere 790 with 300 loader, ballast box, and Jinma 3 pt. backhoe.

  6. #26
    Elite Member wdchyd's Avatar
    Join Date
    Apr 2010
    Posts
    2,876
    Location
    Hooksett, NH
    Tractor
    Kubota B2320

    Default Re: JW-03 Backhoe Problems

    Good going CV....job well done......and great schem RonMar, You're da man..
    2010 Kubota B2320 FEL & BH65
    If it ain't fixed don't broke it!

    http://www.tractorbynet.com/content/...-month-wdchyd/

  7. #27
    Gold Member Smalljobs's Avatar
    Join Date
    Mar 2009
    Posts
    324
    Location
    Massachusetts
    Tractor
    Jinma 284

    Default Re: JW-03 Backhoe Problems

    I'm glad to see all this help as well as earlier posts on the JW03. I just self imported, factory direct, a frame mounted unit & spare parts, that will arrive end July. All of this will be a great resource for me!
    Steve Anderson

    Jinma 284LE w/Creeper/Koyker 160 Loader/Markham Toothbar, Frame mounted HWO4X backhoe, 64" John Deere 3 PH Snow blower,3 PH splitter, Bro-Tek thumb, Jinma 8" chipper, Loader mounted Meyer plow

  8. #28
    Super Star Member J_J's Avatar
    Join Date
    Sep 2003
    Posts
    18,923
    Location
    JACKSONVILLE, FL
    Tractor
    Power-Trac 1445, KUBOTA B-9200HST

    Default Re: JW-03 Backhoe Problems

    Seems like back in post #6, I mentioned checking the pressure on the relief valve, and if you would have done this, you would have found the problem earlier.
    J.J.

    When I works, I works hard. When I sits and thinks, I goes to sleep.

    Git er done.

  9. #29
    New Member
    Join Date
    Aug 2010
    Posts
    23
    Tractor
    John Deere 790

    Default Re: JW-03 Backhoe Problems

    Hey guys,
    Another quick question. Where can I find the gaskets that are like rubber coated metal washers that go in between the valve column and the input hoses? I have been everywhere and no one has any idea what they are.
    Thanks
    2007 John Deere 790 with 300 loader, ballast box, and Jinma 3 pt. backhoe.

  10. #30
    Elite Member wdchyd's Avatar
    Join Date
    Apr 2010
    Posts
    2,876
    Location
    Hooksett, NH
    Tractor
    Kubota B2320

    Default Re: JW-03 Backhoe Problems

    Hyd repair shops use them....
    2010 Kubota B2320 FEL & BH65
    If it ain't fixed don't broke it!

    http://www.tractorbynet.com/content/...-month-wdchyd/

Page 3 of 4 FirstFirst 1234 LastLast

Similar Threads

  1. 1050 woods backhoe hydraulic problems
    By robertpberg in forum Hydraulics
    Replies: 25
    Last Post: 07-01-2014, 10:08 AM
  2. Replies: 7
    Last Post: 10-11-2010, 05:39 PM
  3. Backhoe Backhoe teeth - MF 1528 - problems
    By kb2tha in forum Massey Ferguson Owning/Operating
    Replies: 2
    Last Post: 06-01-2010, 07:49 AM
  4. Backhoe Is your backhoe worth it over the long-haul?
    By witel in forum Owning/Operating
    Replies: 115
    Last Post: 03-13-2008, 08:11 PM
  5. 110
    By joecdeere in forum John Deere Buying/Pricing
    Replies: 0
    Last Post: 05-08-2002, 09:34 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
© 2017 TractorByNet.com. TractorByNet is a registered trademark of IMC Digital Universe, Inc. Other trademarks on this page are the property of their respective owners.