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valve

  1. J

    Komatsu, c30-1 which

    There’s an issue because we’re not getting any return oil on the hydraulic steering pilot control circut. The other pump is working fine for the gear pump . So my best guess is that there’s something backing up one of those valves for the travel . Everything works it just won’t move . It builds...
  2. C

    PC35 Hydro safety valve

    Morning all, looking at the drawings of this machine it looks like it is called the safety valve. There is pretty much no info I have been able to find. Whenever I type something in I get a main pressure relief valve which is not the same thing from my understanding. I am curious what this valve...
  3. H

    How to Determine Spool Orientation in Hydraulic Valve (Rebuilding Main Control Valve)

    I'm rebuilding the main control valve in my Cat 304CR (NAD00987) and I'm having trouble determining which way to install the spools. Some of the spools look like they're the same on each end -- others are clearly meant to be installed in a particular orientation. All of the spools have a...
  4. E

    Case 1845c weak drive motor.

    I have a 95 1845c with originally weak drive motors on one side. The guy I bought it from had a machine that had bad drive motors and he swapped the motors fixing his and now the machine I have is weak. Sold it because it had been in a fire and needed alot hoses and stuff etc. So with that in...
    • Ewayne_R
    • Thread
    • 1845c case drive motor pump side spool tandem valve weak
    • Replies: 4
    • Forum: Skid Steers
  5. S

    auxzilery valve

    How can I add an electric solnoid valve to keep the auxzilery valve by the use of a electric switch? This is on a 1994 Newholland LX565 skid steer.
  6. B

    Cat Excavator 312 1997 Hydraulic Hose Diagram

    Hello, Does anyone have a manual of the caterpillar excavator 312 hydraulic hose system? I have a 1997 model and recently just cleaned out all my hydraulic lines. I had marked everything properly, but the markings on 4 of the hoses wore off from the oil. After hooking everything back up, my...
    • Billy Doug
    • Thread
    • caterpillar diagram excavator 312 excavator 312 1997 hydraulic flush hydraulic hose hydraulic hose diagram manuals valve
    • Replies: 14
    • Forum: Excavators
  7. Skidud

    Case 1840 lift cylinder issue

    When trying to back blade using down pressure, my 1840 (4000 hrs) lift cylinders will occasionally "bounce", as in retract and then spring back. It also acts up when I tilt forward and apply down pressure with the tilt cylinders as well. If I don't apply down pressure with the lift cylinders...
    • Skidud
    • Thread
    • 1840 cylinders hydraulics valve
    • Replies: 0
    • Forum: Skid Steers
  8. CaptSkinny

    JLG 450A - valve ID

    I bought a JLG 450A that I think has some valves in the wrong position, or an incorrect valve installed. But the JLG part numbers in the manual don't match the numbers printed on the valves, which are Hydraforce part numbers (JLG's manufacturer for the OEM values), so I can't verify that they're...
  9. J

    2005 John Deere 410G - No Forward, Goes reverse in neutral and Reverse

    My 2005 JD 410G back hoe stopped going forward. I moved it about 50 feet and it ran strong and accelerated normally. I stopped and put it in neutral and turned the e-brake on. I then turned the e-brake off and shifted into forward and nothing happened. It also goes in reverse when I have it in...
  10. GregoryJohnston77

    case580D valve guide removal and depth.

    Hey Guys I have a case 580d first off. Okay my issue is I live in a small town, we have no machine shop. I've taken out valve guides of many gasers, I've never done a backhoe engine. It's the 207D in a late 80s case 580D. My #1. question is am I safe to press them out myself? I know in cast...
  11. D

    T300 spool valve sticking after replacing seal

    Hello to everyone and thank you in advance for any help you provide. I do most of my own wrench turning and do the best that I can with the self taught knowledge I have to keep my equipment running and my business operating. The machine in question is a 2002 bobcat T300 that runs and operates...
  12. schreib

    grapple jaw falls back down. Help.

    ASV, HT80, diesel 4 cyl. 80 HP Track loader: I have what I believe are two related problems. 1) When using my grapple the upper jaw floats back down after opening and I have to keep tweaking it back open and 2) just bought a snow plow and find I have to keep tweaking it back into position when...
  13. J

    939C bucket valve sticking

    Hi all, got a CAT 939 here. When you raise the bucket, if you pull far enough on the joystick (not much), it locks in like the float mechanism does. It will do it when curling the bucket too. I'm not sure what the pilot pressure is as I don't have a gauge to read it but I'm really starting to...
    • jack.riley29
    • Thread
    • 939 939c bucket cat sticking valve
    • Replies: 2
    • Forum: Dozers
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