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hydraulic pump

  1. M

    Unusual erratic noise from hydraulic pumps (Hitachi EX300)

    Hi everyone! We are hearing an unusual noise from the hydraulic pumps of our Hitachi EX300-1. It has twin axial piston pumps. The noise is difficult to describe but it is erratic/random and the pumps sound stressed (Attached is a short video of the pumps making the noise). It does not sound...
    • MKF1
    • Thread
    • cavitation ex300 excavator hitachi hitachi 300 hydraulic pump
    • Replies: 12
    • Forum: Excavators
  2. K

    Antique Case Hydraulic Pump Upgrade

    Hello everyone, Looking for those who are more experience with this sort of thing than I am. My 1963 Case 530 Loader/Backhoe just pushed the seal out of the hydraulic pump: typically a strong indication of a worn out pump as I understand it. Can anybody verify that? Now of course this pump was...
  3. B

    Takeuchi tl130 left track won’t turn

    Hello everyone I am new to this group and will appreciate any help/ advice I can get. So I just purchased a 2007 Takeuchi tl130 that is having issues turning to the right and going straight. When cold it turns right but not perfect. I would say it last about 5 mins before it starts to slow...
  4. K

    John Deere – Hitachi 120 With Rebuilt Pump and No Hydraulic Function

    We recently had our hydraulic pump fail on our John Deere 120 excavator and replaced it with a rebuilt pump. Currently the machine has no hydraulic functions working with the rebuilt pump. Prior to the rebuild, pump 1 was functioning and Pump 2 completely failed. This a dual swash plate piston...
    • KGB
    • Thread
    • excavator faail hitachi 120 hpk055at hydraulic pump john deere 120 no function swash plate
    • Replies: 3
    • Forum: Excavators
  5. P

    320C Hydraulic Pump won’t turn

    Hi all, I’ve got a Japanese 320C excavator serial no. AKH 01848. The machine is working on an earth dam, excavating relatively soft material. It’s been working without an issues, until a couple of days ago when the operator switched the machine off at lunch time. When he tried to start it up...
  6. TSemenuk

    580CK Lost hydraulics while digging

    I was digging a trench and the backhoe wouldn't swing back after dumping the bucket. I tried all controls including the loader and nothing worked. No massive leaks under her and I didn't hear any unusual sounds. Is there any troubleshooting I can do before removing the hydraulic pump from behind...
  7. R

    Champ CB40 hydraulic pump?

    I found a Champ CB40 basket case, got it all back together with 6 cyl chev and granny 4speed. Love it, even my granddaughter is driving it. It has one nagging problem. The only hydraulic pump i had was a pto pump from a dump truck but it is way too big. What size pump should it have (for lift...
  8. M

    Hyundai Robex 200 NLC-3

    Hello, I'm looking for the operating manual of the crawler excavator Hyundai Robex 200 NLC-3 and the catalogue of its spare parts. I buy a r200 nlc-3. It has a problem in its hydraulic pump. I'm not sur if it's its original one. So i'm looking for documentation to found the right informations...
  9. S

    kubota svl75-2 hydraulic pump pickup

    Had an issue with one of our svl's. It wouldn't move 2' without it shutting down. Upon some intense inspection we found the hydraulic tube on the bottom of the high flow bump was cracked around the flange. It isn't the best of design. It's some pretty thin wall tubing that has three tack welds...
  10. G

    JD 490D Main Pump Regulator Spools

    Hello, I've got an old 490d on my farm and it's been having hydraulic issues. The machine bogs down and starts billowing smoke when you try to run it. If the controls stay below half stroke it seems to run a lot better and the rpms keep up the second you call for full stroke it bogs the motor...
    • Grant Eckard
    • Thread
    • excavator hydraulic pump hydraulics sluggish spools
    • Replies: 1
    • Forum: Excavators
  11. Andrew Navarrete

    Komatsu PC200-6 Pump Rebuild Swash plate / Cam Rocker issue

    Hello everyone! Maybe someone can help me out on this one.... I am Re-building the main pump for my Komatsu pc210-6 excavator. Ive ordered everything new from the cradle to the pistons barrel and valve plate. I have an issue with the rear pump cradel and Swash plate not fitting correctly. The...
  12. A

    Slow lift arms bobcat 763 high flow

    Start the bobcat and for the first few how hours the lift arms are slow but working as the day goes on they slower to go up and the tilt cylinder is slow too. Can the hydraulic pump be the problem. If not then what could be causing this. Oil is full. Also can someone tell me the size and bore...
  13. G

    Heat related problem with Komatsu PC35MR-2

    I recently bought a used PC35 with about 3,000 hours on it. I knew that it had this issue when I bought it, and I got an appropriate discount, but now it is time to diagnose and repair. I am very handy, but have zero experience with this kind of hydraulic equipment. The machine works fine...
    • Garrik
    • Thread
    • hydraulic pump komatsu muffler pc35mr relief pressure
    • Replies: 22
    • Forum: Compact Excavators
  14. D

    possible case 580 super m bad hydraulic pump?!?

    I bought the backhoe with weak dipper movement, especially cold. I changed fluid and filter with still no change. Someone told me there could possibly be a suction screen so i took an air hose and blew into the fluid for the possible screen with hopes to maybe knock some crud (if theres even a...
  15. JD410Jersey

    John Deere 410 hydraulic troubles

    Hello ...hope someone can help,I was running my 410 moving dirt had no troubles parked it and went to use it a week later to find my loader had very little to no power to lift the bucket and the the backhoe will move but not very fast ... steering is fine and the machine drives fine... turning...
  16. D

    1990 Linkbelt 3400 CII- hydraulic pump regulator/control settings- NEED HELP

    The right track is weak, the bucket is weak and the boom up is weak. I had the pump rebuilt, it never fixed the issue. I am looking for possibly issues that could be causing this to figure out how to fix it. The outer pump won't maintain pressure. Can't find any system set up through Linkbelt...
  17. Skidud

    Case 1840 hydraulic pump upgrade.

    Does anyone know if I can swap my 1840's hydraulic pump for a 40XT or even a 60XT or 75XT hydraulic pump? They all have a 7/8" 13 spline shaft. The 1840 puts out 15 gpm, the 40XT flows 19 gpm, and the 60/75XT pumps out 21 gpm. The biggest concern I have is the increase in relief pressure from...
    • Skidud
    • Thread
    • 1838 1840 1845 1845c hydraulic pump
    • Replies: 3
    • Forum: Skid Steers
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