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hydraulic

  1. G

    Cat 235 hydraulic issues

    Thank you for letting me join, I have a cat 235 excavator I’m not sure of the exact year 64R00978 is the serial #, I recently acquired it from another mine who used it with slow hydraulics for years and they are SLOW unless the machine is ran at 100% throttle then it is still slow but it moves...
    • Gman9700
    • Thread
    • cat cat 235b excavator hydraulic slow controls
    • Replies: 16
    • Forum: Excavators
  2. Mzdiesel

    Komatsu 300lc-7 multi-function slow

    Hey all, I’m looking at a komatsu 300 LC -7, I believe. Serial #A90215. I believe I am dealing with a lot of leakage/ priority issue. The main complaint is that you cannot perform two functions at the same time. If you raise boom and bucket the boom will pretty much stop same for bucket and...
    • Mzdiesel
    • Thread
    • cat dozer excavator help hydraulic komatsu
    • Replies: 6
    • Forum: Excavators
  3. P

    317B excavator stick ram opening up and won’t hold

    Hi all, I’ve got a 317B that we recently replaced cylinder seals on. Before replacement, machine was okay and didn’t have any hydraulic issues apart from external leakages (which necessitated the seal replacements.) All other cylinders were fine after the replacement, but the stick cylinder...
  4. T

    Hitachi ex120-2 hydraulics overheating.

    Hi all, I have a 1994 Hitachi ex120-2 that is running hot on hydraulics after about an hour. No alarms or indicators saying it’s too hot. Checked with a temp gun and it’s around 160°-175°. Oil cooler is cooling the oil difference of about 10-12°. Pilot pump like has surge of chatter, one tick...
    • TLogging
    • Thread
    • hitachi hitachi ex120-2 hydraulic
    • Replies: 43
    • Forum: Excavators
  5. B

    CAT 299D2 No Hydraulic

    Hi all, Serial #: EFD202983 I’ve scoured the message boards and tried everything that I’ve come across, but my machine is still immobile. Out plowing snow a week ago, running good (engine and Hyd) and just out of no where I lost my hydraulics (no loader or track movement). Joysticks both work...
  6. B

    Bobcat X231 lost multiple functions I am at a loss

    Bobcat x231 excavator. Left track, boom and arm functions stopped working completely suddenly at the same time. Right track, bucket, swing, blade, aux, all still working fine. Hydraulic fluid and filter is clean. Hydraulic pilot system, no electronics. Would appreciate any input where to start...
    • Branstor
    • Thread
    • bobcat bobcat x225 bobcat x331 excavator hydraulic x231
    • Replies: 41
    • Forum: Excavators
  7. 1

    Milky hydraulic oil

    So I have this old excavator and it got what I presume water in the hydraulic oil. Anyways like 26 pales and 3 flushes later I finally got clear oil after running the machine. I ran it for a few hours, checked the oil again, still clear I suspected it was my vent cap that got water in there so...
  8. K

    Komatsu pc228 code 306

    How’s it going gents, I have a komatsu pc228, the motor will not start. Acting like it’s under full load from the pump, I have code E306, the feedback potential circuit is abnormal, we tested the solenoids and we’re getting the in between 40-60 ohms of resistance the book requires and they were...
    • korbind96
    • Thread
    • 306 code eletric engine excavator hydraulic komatsu komatsu 228 pump
    • Replies: 2
    • Forum: Excavators
  9. MikeSelly

    Hydraulic Track won’t tighten

    Having issues with our t870 2018 bobcat skidsteer. We got the track back on but the track won’t tighten. The tensioner fitting is less than a year old. Any ideas?
  10. cvjune10

    CAT 299D3 Revs Up Right After Key is Turned To Shutdown Machine

    CAT 299D3 (DY9) slightly revs up and it sounds like the hydraulic fan revs up a little bit right after to turn the key to the off position. I'm going to calibrate the fan today, but beings there is no codes I wondered if this was a normal procedure and what the point of it is. I also have two...
    • cvjune10
    • Thread
    • 299d3 cat electrical hydraulic skid steer
    • Replies: 0
    • Forum: Skid Steers
  11. B

    Volvo EC 160C L Hydraulic power low

    Hello group, I'm new here but have been in the heavy equipment business for 15 years. I'm having trouble with a 2007 Volvo EC 160C L excavator. The first thing I notice is the hydraulics will barely lift the machine tracks off the ground before stalling out. Second thing that is occurring is the...
  12. MarkS1

    Bobcat 323-J controls are jerky...

    Got a 2005 Bobcat 323-J that hasn't been serviced in a long time. The hydraulics leak a little, requiring about a quart or so after 5-10 hours use. My main complaint is the controls seem awfully jerky. They will respond nice and easy at first but just a little too much handle and they jump...
  13. 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
  14. M

    Overheating Issue in a Closed Hydraulic System – Sauer SP23 Pump & Hydraulic Motor

    Hi everyone, I’m experiencing an overheating issue with a closed hydraulic system. The system consists of a Sauer SP23 hydraulic pump and a hydraulic motor, driving a concrete mixer. It operates normally, but it overheats over time. Has anyone encountered a similar issue with a closed hydraulic...
  15. R

    New Holland C337 bucket quick attach issue

    Serial number: NRM453654 New Holland C337 Does anyone have the hydraulic schematic for the bucket quick attach system? Machine will not release bucket, hydraulic lines were messed with from previous repairs before it came to me, and info would be much appreciated.
  16. M

    Liebherr R912 HDS litronic slow hydraulic

    Hello to everyone, I have problem with Liebherr R912, manufacturing year 1997, it work only in emergency mode(manual mode), when in auto mode it is too much slow. Something wrong with current to hydraulic pump regulation. Anyone can help ?
  17. P

    Volvo EW180C issues with arm and bucket not having power

    Hey guys, i just bought an EW180C volvo from 2008. First thing i did was to send the machinery in Volvo dealer for a big service and a control pattern change kit, because i wanted the backhoe pattern as well. The dealer checked pressures and they were in spec. Today, first day of having the...
  18. K

    Jd 444 Hydraulic issues

    How’s it going guys, I have an old 444 loader, it has no steering, won’t go into gear, and the bucket barely lifts at all, last mechanic to touch it replaced the pump, he didn’t even change the filters when he did it. I changed steering filters on it along with the return filter in the hyd tank...
    • korbind96
    • Thread
    • 444 brakes hydraulic hydraulic troubleshooting lift loader pump steering
    • Replies: 26
    • Forum: Wheel Loaders
  19. 264Chief

    Bobcat 743 Spool issue

    Anyone had this issue...? I bought a beat up old Bobcat 743 and it mostly worked as it should. The tilt spool forward seal had a good leak and the boom down pressure seemed off almost like the cylinders were binding up when going down and the float function didn't really work. I decided to...
    • 264Chief
    • Thread
    • 743 bobcat boom foot control hydraulic pedal spool spools
    • Replies: 10
    • Forum: Skid Steers
  20. M

    Kubota KX121-2 hydraulic schematic

    Hello, I'm currently looking at a KX121-2 which hasn't got any of the functions on the levers working. The tracking and blade do work. I've checked the safety switches in armrests and am getting power to the solenoid when the safety lever is down, and off when the lever is lifted up again...
    • MikeRh
    • Thread
    • hydraulic kubota kx121-2 pilot controls schematic
    • Replies: 0
    • Forum: Excavators
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