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pilot pressure

  1. A

    John Deere 490e hydraulic issues

    Having some hydraulic issues with my 490e later serial #. Pilot pump and all hydraulic filters are new. pilot relief and regulated pressure is 720-730 ish and 510-520 ish tested as the book says to. The main problem im having is the hydraulics are jittery when feathering the controls and swing...
    • adamwubben
    • Thread
    • 490e hydraulic issues john deere 490e pilot pressure
    • Replies: 5
    • Forum: Excavators
  2. Chiefdug

    Adjusting proportional valve secondary pressure

    Good evening to all, I have a quick question. Has anyone ever removed either of the relief valve caps on a Hitachi ex120-2 proportional solenoid valve bank. My pressure on the secondary relief of the pilot system is too high, so I need to pull the cap off and remove one or more of the shims...
  3. S

    YANMAR B12 (pilot joystick) - how to get pressure for pilot joystick

    Hello everyone, this is my first post on the forum, so I hope I’ve followed all the rules and written it clearly enough. I’m having trouble with an excavator Yanmar B12 with pilot joysticks. This type should be similar to the B14 and B17, year of manufacture is before 2000. I haven’t been able...
    • slavek
    • Thread
    • pilot joystick pilot pressure yanmar b12 yanmar b14
    • Replies: 3
    • Forum: Excavators
  4. J

    Takeuchi tb135 pilot valve problem

    Hello. Recently i have done a little mentainance. Changed all the hoses for undercariage and swivel joint. And 1 hose for pilot valve and 2nd speed. So the problem is that lefthand pilot valve is not operating ok. Arm lifting works ok, lovering not. It looks like that it needs some time to send...
    • jurac
    • Thread
    • pilot controls pilot pressure tb 135 tb 135 hydraulic issues
    • Replies: 3
    • Forum: Excavators
  5. E

    Hydraulic valve body issue I cant figure why, Nissan n350-2

    One day my nissan n350-2 mini excavator lost maximum power in the boom retract (digging in towards you) function. It had a leak in the cylinder, so I fixed it, no difference. I noticed the pressure on the retract side of the cylinder on a gauge was low, but it had a slight pressure all the time...
    • eddie57
    • Thread
    • excavator hydraulic control valve nissan n350-2 pilot pressure valve willie59
    • Replies: 10
    • Forum: Excavators
  6. R

    No pilot control oil pressure. Help!

    Hello Gents. Brand new to this forum. Thank you to John from "Farmcraft" Youtube channel for the link to this site. I have a 2002 Mustang 3503 mini excavator (Gehl/Wacker Nueson) I recently picked up that needed some tlc to bring her back to life. Long story short, I have no pilot oil pressure...
  7. D

    WA-180 loader transmission issue

    i'm having trouble with the loader the transmission is slightly slipping until its at wot . I have done some pressure testing. we only get around 210 psi at priority port manual says 333 psi. the line feeding it is routed to the brake booster first. i've tested the pressure at the booster when...
    • Dwallace
    • Thread
    • komatsu 180 komatzu pilot pressure transmission transmission control valve
    • Replies: 6
    • Forum: Wheel Loaders
  8. J

    EX120-2 system base pressure too low

    Hey everyone, I am looking for some more brain power with this problem. Machine is a 120-2 with what I believe to be a 120-3 main control valve (mcv). This means it does not have the adjustable pressure regulator on top of the unloading valve like the -2. Its on the bottom instead. According...
    • Jason Klassen
    • Thread
    • cracked control valve dp sensor ex120-2 ex120-3 hitachi internal crack main control vavle pilot pressure pressure unloading valve
    • Replies: 122
    • Forum: Excavators
  9. J

    Hitachi zaxis200LC-3 auxiliary pilot pressure loss

    Hi all! Long time reader, I’ve learned a lot of good info in here. I have an issue that I thought some of the gurus on here might have ideas on with a new to me Hitachi zaxis 200lc -3. Serial# ARH310868. I installed a hydraulic thumb and pilot pedal valve with the appropriate pilot hoses and...
  10. D

    Terex hr16 pilot pressure pump problems

    Greetings, this is my first post. I am having trouble with the pilot controls on my Terex HR16 excavator. I have found the information on this forum most helpful, And I am Thankful you are here! My excavator machine: Terex HR16. Year 2003 Pump installed : Kayaba PSVD2-18e-3. Appears to be...
    • Dbothe
    • Thread
    • gear pump rebuilding joysticks metal shards pilot controls pilot pressure pilot pressure accumulator psvd2-18 pump charge pressure schaeff hr16 terex hr16
    • Replies: 9
    • Forum: Excavators
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