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hydraulic

  1. C

    CAT 277C No Right Stick Controls - Driver Warning Light Flashing, no Alarm (USMC Equipment)

    Trying to diagnose a Marine Corps skid loader. Driving controls work, bucket controls (right stick) do not, and tool controls (auxiliary controls) seem to work. The driver warning light is flashing, there is no alarm/buzzer. The battalion has a CAT computer but it's out of date so we can't read...
  2. H

    How to bleed air from hydraulic system? - CAT 304

    Hi all, I'm starting a new thread for this issue. The original issue resulted in me removing the main control valve, cleaning it up, and installing new seals: https://www.heavyequipmentforums.com/threads/final-drive-motor-on-one-side-bogging-down-engine-cat-304cr.95940/ It's a 2004 Cat 304cr...
  3. Junkyardmitch

    272c cat skid steer lost all hydraulic function

    Hello, first post so bare with me. 2010 cat 272c wheeled skid loader yard hand was operating it said he heard a quick nose( he could not describe the noise) and lost all hydraulic functions wouldn’t drive move arm bucket ect zero function. After playing with the switches and checking fuses and...
  4. Newbury1289

    JD 544k overheating

    i have a 2018 JD 544k with 777 hr the problem i am having is the cooling fan is not working properly, the fan is running at 200rpm at 100% command, and about 500 rpm at wide open throttle, I tested for power at solenoid I have 26v when running, and tested solenoid, this machine does not have...
  5. A

    580CK Model 33 Loader Lift Seals

    I have been working on my 580CK. Does anyone have experience ordering and replacing the lift cylinder seals? Where did you order your seals from and were they the right size? Thank you for your help.
  6. H

    Final Drive Motor on One Side Bogging Down Engine - Cat 304cr

    I just replaced both final drives on this machine. It solved my issue on one side (caused by a failed final drive) but I'm still having a problem with the other side. Basically, when I engage the final drive on that side, the engine bogs down and the hydraulic pump whines like it's under...
  7. C

    Hitachi 120-2 Won't Swing

    Recently picked up a Hitachi 120-2, previous owner lost swing function during use. He rebuilt swing motor and had local Deere service check pressures, they checked out ok. Unit free swings by hand while all other hydraulic functions work properly (Boom, Travel and Bucket). Could this be a...
    • Chase D.
    • Thread
    • 120-2 hitachi hitachi hydraulic swing
    • Replies: 17
    • Forum: Excavators
  8. H

    Where to Buy Hydraulic Thumb?

    I've been looking for a hydraulic thumb for my Cat 304c. I want the pin-mounted type, not a weld-on. I've exhausted Google search and haven't found anything, new or used. Does anyone have a source for hydraulic thumbs?
  9. S

    CAT 226B TILT RAM NOT HOLDING PRESSURE

    So I was stockpiling some wet sand today and all of a sudden my machine won't hold tilt. It looses pressure even when empty. What can be the issue? My machine is a cat 226b.
  10. T

    1986 c30 roll back tow truck blowing the seals out the hydraulic

    Hey I’ve got a old c30 roll back tow truck. Seems like whenever the bed bottoms out it blows the seal clean out the rear of the hydraulic. We tried repacking it twice and every-time it over pressurized and boom goes the seal and bushing right out the back. Any idea what could be causing this?
    • Tomcat955
    • Thread
    • c30 chevy hydraulic sq body tow trucks
    • Replies: 8
    • Forum: Trucks
  11. T

    1986 c30 roll back tow truck blowing the seals out the hydraulic

    Hey I’ve got a old c30 roll back tow truck. Seems like whenever the bed bottoms out it blows the seal clean out the rear of the hydraulic. We tried repacking it twice and every-time it over pressurized and boom goes the seal and bushing right out the back. Any idea what could be causing this?
    • Tomcat955
    • Thread
    • c30 chevy hydraulic sq body tow trucks
    • Replies: 0
    • Forum: Trucks
  12. R

    Case 580B loose fittings pouring hydro

    Was using the rear bucket on my backhoe and lines starting pouring at the bucket and dipper linkages. A video is posted below. Will this require the fittings to be replaced/whats the best way to go about tighenting down the lines. Cannot reach them with my standard wrench...
  13. G

    Oil lamp + hydraulic «studder»

    Cat 302.5 ca. year 2000. Bought the machine used. 3000 hours. Installed new filters and new oil, both engine and hydraulic. The issue: Hydraulics «studder» real hard, and the oil pressure lamp lights up at the same time the studdering goes on. Seems to change a bit when I change the idling...
    • Govt
    • Thread
    • hydraulic lamp problem shaking
    • Replies: 8
    • Forum: Excavators
  14. Bad billy

    Blown hose at blade

    Blew a hose on my ex75ur hitachi .Blew it right at the blade.Does any one know where the other end of the hose connector goes .Is there a easy way to get at it ?
  15. A

    Case 580SE Hydraulic Backhoe control issue.

    Hi everyone. New here. I have a mystery year late 80s early 90s 580se backhoe with hand swing controls. Every individual control works as it should very strong (boom, stick "dipper", curl) but as soon as I ask for a two controls at once they both slow to a snails pace or dont move at all...
  16. T

    Bobcat s70 bucket curl sticking

    I had an s70 come in with a leak and bucket curl function sticking. The leak was from the bucket curl spool seal. I removed valve and resealed the valve. Did not notice any damage to spool or bore. I put everything back together and the bucket curl function was still sticking. I noticed that the...
  17. C

    Hydraulic loss of power

    Morning all, I have Komatsu PC35R-8 Serial #F21286. The machine has 1100 hours on it, had no issues when I purchased it approx 3 months ago. I does have one leaking cylinder but not critical to operation and not a significant loss. Recently I seam to lose power after the machine is on and hydro...
    • cpmartin1989
    • Thread
    • excavator filter hydraulic komatsu loss of hydraulics loss of power mini pressure
    • Replies: 13
    • Forum: Excavators
  18. R

    Bobcat 337 pilot controls not working

    I have bobcat 337 and the pilot controls work off and on changed the lockout sensor and magnet but no difference. Blade works always. Does any one have a wire diagram for it or suggestions. Thanks
  19. S

    Mini digger wont lift itself on dozer blade

    Hey, I have a 1.5t mini digger, and having trouble with the dozer blade. The mini digger cant lift itself with using only the blade. If i lift the excavator with the arm and then lower the dozer blade, it stay still. Since i now are repairing and changing parts, i want to fix this aswell. I...
    • sandymann
    • Thread
    • blade cylinder diggerblade dozerblade excavator hydraulic issue minidigger pressure weak
    • Replies: 5
    • Forum: Excavators
  20. D

    link belt 210LX adding hyd. thumb

    Recently bought an 03 link belt 210LX excavator to clean up some building sites, groves, and fencelines. It currently has a single function aux hyd system on it now. Wanting to add a hyd thumb if possible, got a quote for 8k just in parts (not inluding thumb) to add a dual function system...
    • Dan Jones
    • Thread
    • hydraulic link belt thumb thumb switch
    • Replies: 9
    • Forum: Excavators
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