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hydraulic pump

  1. K

    link belt 330lx main hydraulic pump

    Hi all i am new to the forum but a long time viewer. I am looking at purchasing a link belt 330lx that has a bad main pump. I have installed OEM reman pumps in the past but was wondering if anyone has experience with new aftermarket pumps from websites like fab heavy parts? OEM reman is $18,000...
    • KTH
    • Thread
    • excavator hydraulic pump link-belt
    • Replies: 0
    • Forum: Excavators
  2. J

    TB260 hydraulic pump leaking under load

    Hello, my TB260's hydraulic pump is leaking pretty bad when either the Arm cylinder or slew motor is under load. Here's a little video: https://photos.app.goo.gl/Bu2HsPMw9cy8LsNq5 Hydraulic functions operate normally and with good power. Curious if those with experience say this involves a full...
  3. H

    Hitachi ZX140W-3 Hydraulic pump Noise

    Hello, I received helpful advice here the last time I had a problem so I am back again. I have a Hitachi Zx140W-3 (HPV 118 Hydraulic pump ) the pump is Producing 340 bar of pressure at hydraulic pump 1 and only 260 bar of pressure at Hydraulic pump 2, this is accompanied by a cavitation whine...
    • HitachiEX
    • Thread
    • cavitation hitachi zx140 hpv118 hydraulic pump hydraulic whine noise
    • Replies: 3
    • Forum: Excavators
  4. N

    Hitachi ex220-3 stalling

    Hey guys, my Hitachi ex220-3 is stalled. It will start up amd idle but is bogged down when it revs up it will not go full throttle as it is bogging blowing black smoke everywhere. I have put on a new angle sensor and differential pressure sensor. I also switched the silonouds on the back of the...
  5. J

    pc35mr hydraulic pump rubber coupling installation tips?

    Howdy, I'm installing a new rubber coupling between the flywheel and hydraulic pump. It's one of those rubber rotary shaped couplers. I have the coupling assembled to the splined hub. However, the mounting holes don't line up with the holes on the flywheel. I guess the shape of it has distorted...
  6. H

    Can’t figure out hydraulic pump wiring 14x7 dump trailer

    Just picked up an old worn down dump trailer from my buddy and whoever attempted to fix it last mixed up all the wiring going to the solenoid and motor. I’ve tried a few different configuration and can only get a click out the solenoid when I hit the lower button (won’t do anything when I try to...
    • hserro
    • Thread
    • dump trailer hydraulic pump solenoid
    • Replies: 1
    • Forum: Trailers
  7. 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
  8. 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...
  9. 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...
  10. 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
  11. 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...
  12. 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...
  13. 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...
  14. 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...
  15. 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...
  16. 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
  17. 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...
  18. 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...
  19. 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: 27
    • Forum: Compact Excavators
  20. 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...
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