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slow hydraulics

  1. P

    Komatsu PC30UU3 - slow and overheating hydraulics

    Hi all, I’ve got a Komatsu PC30UU-3 Serial No. 13417 mini excavator that has slow and overheating hydraulics. Works fine when it’s cold, but once it’s worked for a couple of hours, will struggle to lift the boom (very slow) and sluggish controls all round. Machine starts up fine and has plenty...
    • Pralhad Birdi
    • Thread
    • excavator komatsu mini excavator overheating slow hydraulics
    • Replies: 1
    • Forum: Excavators
  2. M

    Yanmar Vio3.5-2 Arm - Slow moving hydraulic ram - one direction

    I purchased a Vio35 with 3500hrs. Hydraulics appear strong on all circuits, however the Arm ram is slow ONLY on extension (ie when pulling towards the cab). I first started by checking pump hydraulic pressure on the arm circuit (pump 1) which is at 3000psi (what it should be). The arm psi...
    • MickeyH
    • Thread
    • hydraulic slow hydraulics valve vio35 yanmar
    • Replies: 0
    • Forum: Excavators
  3. allen lafrance

    A25D15718 Dumping slow

    Hi all my A25D15718 dumping really slow However it lifts as usual I would like to know the port to perform a pressure reading and other to solve my problem I also hear the valve limit the flow and I see an adjustment behind the spool but when I unlock nut the screew is loose no resistance as...
  4. T

    Bobcat 442 slow swing but speeds up when right stick is bumped

    My boss purchased a 442 at auction. (I have since learned to Google common issues before letting him bid) Anyways we have been getting some of the kinks worked out of it. One issue is we noticed that at times it is slow to swing but if you bump the right stick while swinging it will swing way...
    • twglue
    • Thread
    • bobcat 442 diagnosis help me hydralics slow hydraulics swing issue swing slow
    • Replies: 0
    • Forum: Compact Excavators
  5. T

    Bobcat 442 issues

    My boss purchased a 442 at auction. (I have since learned to Google common issues before buying certain models) Anyways we have been getting some of the kinks worked out of it. One issue is we noticed that at times it is slow to swivel but if you bump the right stick while swinging it will...
    • twglue
    • Thread
    • bobcat 442 hydraulic slow hydraulics swing
    • Replies: 1
    • Forum: Excavators
  6. R

    Case 580sm outriggers move very slow

    So I have an 07 case 580sm series 2. It’s got pilot controls in the back. Just yesterday my outriggers started moving extremely slow. One of the has a recent rebuild the other is getting one done now. i am looking for ideas of what it could Be. I plan on draining the hydraulic tank and...
  7. M

    Hydraulics slow/weak after cylinder seal change

    Help! Bobcat 337. I changed the boom seals and put it back together, added new fluid to make up what came out of cylinder (about 3 gallons) put it back together. And ran it to get the air out. At first was the usual air in system sounds along with jerky controls then things smoothed out but...
  8. JamesPC35mr-2

    PC35MR-2 2007 Slow functions/ 3500 PSI

    Hi, and thanks for the help in advance. Been on here for a while and this is my first post, hopefully it’s in the correct place. I have a 2007 PC35MR-2, I have owned this machine for 4 years and use it only for personal use. I’ve been dealing with the issue the entire time, and manage my way...
    • JamesPC35mr-2
    • Thread
    • compact excavator excavator komatsu loss of power mini excavator pc35 pc35mr-2 hydraulic track komatsu slow hydraulics weak weak functions
    • Replies: 6
    • Forum: Compact Excavators
  9. D

    D5C XL series III slow blade hydraulics at idle

    Just bought a used D5 that pushes strong. All seems to work, except it won’t even lift the blade at idle. Everything works as it should and blade will even lift machine at 3/4+ throttle. Is there an adjustment for hydraulic speed? It would be nice to be able to move the blade even when the motor...
    • dfester
    • Thread
    • d5c dozer slow hydraulics tracks undercarriage
    • Replies: 3
    • Forum: Dozers
  10. Syleng1

    Hitachi PVC question

    Quick question: Hitachi EX120-2 My hydraulics are getting slow after warm up - previously I asked questions about swing only but now tracks are slowing and eventually the arm and boom movements are getting choppy after run time. 0-20mins all is well 20-30 mins of time loose swing speed 30-35mins...
    • Syleng1
    • Thread
    • ex120-2 slow hydraulics solenoid
    • Replies: 3
    • Forum: Excavators
  11. D

    434E Hydraulics Problem

    I picked up a used 434E a few months ago. It ran great until recently. It was at a job site when all the hydraulics became very slow. Also the travel home was very slow. The engine reaches proper rpm, fluid levels and filters ok. Anyone have an idea what to look for? Is there some ECM...
  12. C

    Case 688 slow hydraulics

    Hello, I just recently bought a case 688 excavator that needed a motor rebuilt and which the dealer indicated it was the pump so I rebuilt the engine and went through the pump which had no sign of issues. After starting it up and running it for 30 minutes I noticed that the whole machine is...
  13. Bobcat Crazy

    Need a little more help Case 90XT (hydraulics)

    Hi All, I finally got her going :D:D:):p! Man that was a long drawn out rebuild :eek: but it was just when I had spare time. The engine runs great and everything seems to work as it should except the speed of the hydraulics. It seems to have plenty of hydraulic power but the bucket goes up and...
  14. H

    Hitachi ZX225us Slow hydraulics

    My zaxis 225us just went slow in 30-1hr just before starting in the morning... Are the two soleniods at the pump controls the load?
    • Havs ke
    • Thread
    • hitachi electrical problems slow hydraulics slow when hot
    • Replies: 1
    • Forum: Excavators
  15. J

    New JD 710 owner needs help. No crowd (dipperstick) power

    I'm new to this forum and to this machine. All functions work well but the dipperstick has very little power. Meaning it will move with no load and the engine pulls down slightly when it does. But but when I have even a half a bucket it will not crowd, even in loose soil. I have checked...
  16. B

    Hitachi zx160 gets slow after 5 minutes of operation.

    Hitachi run good when cold and after about 5 minutes of working the machine the hydraulics slow down. Please help
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