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hydraulic

  1. Q

    Hitachi ex120-3 cavitation/aeration

    Hello all, looking for some help diagnosing my old beater. In the past few hours of use, the machine will whine like it's out of fluid under heavy load, particularly when swinging, but eventually with any function. Power is about 1/2 what it was before issue. The hydro tank is very bubbly after...
    • qwertylad
    • Thread
    • cavitation ex120-3 hitachi hydraulic
    • Replies: 5
    • Forum: Excavators
  2. A

    Need Help with Komatsu PC55 **Possible Hydraulic Issue**

    I have a Komatsu PC55-MR3 that I purchased from China and got it shipped here in Calgary, Canada. The machine was dropped at a Komatsu dealership and they filled up the machine with fluids and diesel and performed the following work: Filled hydraulic fluid, engine oil & coolant Change the...
    • Amjad.kamal
    • Thread
    • hydraulic komatsu mini excavator pc55mr-3
    • Replies: 21
    • Forum: Excavators
  3. Z

    Issue in electric hydraulic pump system

    One hypothesis is that there is air in the line but there may be a larger story at play. Please see the full length of this 60 second video. A few details: -the issue does not present when initially running the pump, but presents after making 10-15 presses -I checked the hydraulic reservoir...
  4. T

    CAT257B. Does not want to turn when it warms up. lift arm cylinders leaking down while running.

    I have a 2005 CAT257B. The lift arm cylinders will leak down fast while running the machine. You have to hold back on the joystick to keep it up. If you turn the machine off it does not leak down. I have repacked the cylinders and it still does it. Also, when the machine warms up it does not...
  5. A

    JD 160C LC Hydraulic Noise

    Good day everyone! We've got a 160C LC, ~8000hrs on it, that's recently tarted having a very loud hydraulic whining, sounds like the main pump is cavitating. I'm certain it is because as the unit runs the oil gets foamy and in the sight glass and starts to get louder and louder. The unit never...
    • AAVDTECH
    • Thread
    • excavator hydraulic hydraulic oil john deere john deere 160clc john deere 160lc
    • Replies: 6
    • Forum: Excavators
  6. N

    New family member - 1966 Austin Western Super 300

    Hi folks, I recently acquired a 1966 Austin Western Super 300 that is in pretty nice shape apart from one hydraulic leak. Serial number is V366-10630. I also recently enjoyed browsing through Dwan Hall's restoration of his AW grader - extremely impressive! My first two questions for this...
    • np.mdbr
    • Thread
    • austin western grader hydraulic manuals super 300
    • Replies: 9
    • Forum: Motor Graders
  7. B

    D4C hydraulic oil cooler failed 5th time

    I have a 2001 Caterpillar D4C hystat LGP. I am in the process of replacing the hydraulic oil cooler for the 5th time since I bought it in 2008. All of the coolers have failed in the same area. (bottom right corner). The parts department at my local caterpillar dealership is telling me that’s the...
    • blanchb
    • Thread
    • cooler d4c hydraulic hydraulic cooler
    • Replies: 9
    • Forum: Dozers
  8. C

    Cat 950F Hydraulic overflow

    I work for a snow removal company. We have an older Cat 950F. Yesterday, we discovered Hydraulic oil leaking out of the filler cap after lunch. We let it cool, still overflowing. I didn't notice any obvious aeration or any off-color in the fluid. Is there something that could cause an overfill...
  9. T

    1980 New Holland L775 Skid steer slow cranking issues

    Hello I have owned this machine for about a year. It is a 1980 New Holland L775 with a 4 cyl duetz deisel engine. I had been having an issue on and off where I was dealing with a slow cranking issue. I have replaced battery cables and terminals. One of the first times this happened was when i...
    • thatgumwrap
    • Thread
    • electrical hydraulic new holland new holland l7750 skid steer
    • Replies: 4
    • Forum: Skid Steers
  10. M

    Kubota KX80-4 Thumb cylinder drops

    Aloha and thanks for checking this post out. I hope that someone will be able to give me a good lead to fix my hydraulic issue. I was operating my 2018 machine yesterday and all of a sudden the thumb fell down while I was using the bucket. It didn't slam down, but gradually fell making the...
  11. R

    Bleed Hydraulics 257b3 Caterpillar

    Just recently did work on my skid steer and lost a lot of hydraulic fluid. Can someone point me in the right direction to bleeding the lines? I filled reservoir with hydraulic fluid already. Cat 257b3
  12. T

    210LE - hydraulic leak / e brake issues

    I am new to tractor ownership so forgive me if these are stupid questions. I’ve had this hydraulic leak for what looks to be a valve for the front bucket. I took photos to the dealership and they just recommend o rings. The issue is I can’t seem to get the valve part off. Is there a trick...
  13. D

    Kawasaki pump regulator installation

    Hello I have a daewoo excavator with Kawasaki dual pumps, I need to replace seals where the face of the regulator meets the pump, Service manual says to unbolt regulator and install in reverse process, picture shows the lever coming out the end. When I pull the regulator off, do I need to align...
  14. T

    Jcb 260 bucket tilt cylinder broken rod

    Hey everyone after looking and looking I am not able to find any part numbers or anything. I have 2013 jcb 260 skid steer. The bucket tilt cylinder has a broken rod. I have a guy who can possibly build me a new one. Just wondering if I can buy a new or used cylinder. He is a few weeks out...
  15. T

    48 VDC hydraulic system. Looking for parts source

    Hello all, I am searching for a source for 48VDC 15W coils for a hydraulic stem valve. The coils on the machine are Sterling Hydraulics but I guess they've gone out of business. I think the bore is 13MM and the shaft length is about 40MM. I can order valves from a parts supplier, but I only need...
  16. Bad billy

    Ex75ur final drive problems

    Blew my cone seal on my final drive .Is there an inline filter on the return lines?put another drive in and the same thing happened after 30 minutes ,so I have problem of the drive not releasing the pressure.Has any one have any input?Need to find hydraulic schematics on the Hitachi ex75ur ?Any...
    • Bad billy
    • Thread
    • final drives help hitachi hydraulic
    • Replies: 2
    • Forum: Excavators
  17. J

    mile marker hydraulic winch disassembly help

    Hey all, so I have some internal damage in the gearbox of my mile marker 12000 lb hydraulic winch. I'm trying to get the thing apart but not having much luck with it. They sent me a parts stackup, attached below. I've tried whacking the drum off with a deadblow, and using a gear puller, to no...
    • John V
    • Thread
    • hydraulic repair winch
    • Replies: 4
    • Forum: Trailers
  18. D

    Help with E120b Cat auxiliary hydraulic line setup

    I recently purchased an e120b caterpillar excavator I would like to get a hydraulic thumb but I have no auxiliary hook ups so I was wondering if someone can help me out
    • Dante Lomelo
    • Thread
    • attachment auxiliary cat catapillar e120b excavator hose hydraulic thumb
    • Replies: 6
    • Forum: Excavators
  19. 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...
  20. JeffMiniSkid

    Vermeer S650TX, options for drive motor replacement

    Hi group, I am new to this forum so I apologize if this is in the wrong location etc. The hydraulic drive motor for the track is out on one side and the quote for replacement I'm getting from Vermeer just isn't doable (around $4500). I'm curious if anyone has done a similar job and what my...
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