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excavator

  1. Columbo

    Cat 311B excavator questions

    To follow up on my first thread: https://www.heavyequipmentforums.com/threads/help-newbie-pick-a-used-excavator.92686/ with the assistance of the community here I purchased a Cat 311B excavator. I’d like to use this thread to ask questions about this machine specifically. For reference the...
    • Columbo
    • Thread
    • cat 311 cat 311b excavator
    • Replies: 62
    • Forum: Excavators
  2. Jimothy

    Frozen stuff in tracks

    How do you guys get frozen material out from inside of tracks, we had some guys leave it too long and now there’s globs of clay sand rocks snow and branches frozen in solid balls inside the tracks. Can only get small tools inside the track frame they’ve already damaged undercarriage so don’t...
  3. C

    Case controls question

    We got a 1996 Case 9050B a few months ago, it’s been pretty good to us but The last time I got in it none of the controls would work. I put the arm rest down, put the lever down, and pressed the control unlock button and that usually makes everything work just fine but today the lock on the...
  4. C

    General Maintenance Questions

    Morning everyone ... question is in regards to a mini ex I purchased. Model PC35R-8, Serial # F21286 I purchased the operation manual. I am a little confused as all the other machines I have, "old equipment" calls for just generic hydro oil. This is calling for SAE10W ... the company I bought...
  5. Jimothy

    Excavator spatial awareness

    Just wondering if anyone has tips for moving in tight spaces like expensive stuff everywhere and close to your counter weight/ blindside I’ve had a couple hours on dozer but usually when stuff goes crazy on site I have to jump into other equipment and this is one of my biggest concerns with...
  6. Y

    Kobelco SK120 MKV

    I have an issue with my Kobelco SK-120 mark 5 excavator. The alarm is going off for everything in the machine. The screen indicates oil, water hydraulic etc. Is there a solution to this issue or does anyone know what to look at?
  7. tharindudimi

    DECAL DIMENSIONS OF KOMATSU PC 210 LC 8

    Dear Members, can someone get me the height and width of the KOMATSU Logo at the back weight plate of the excavator. Other information such as the original colour code and lettering size could be of much help. cheers,
    • tharindudimi
    • Thread
    • decal kit decals excavator komatsu pc 210 stickers
    • Replies: 1
    • Forum: Excavators
  8. O

    Komatsu PC200 Lc-8 hydraulic hoses keep bursting

    Working with my pc200 with 10k hours and multiple different hydraulic hoses bursting one after another. Not sure if this is normal due to high time or a problem with the hydraulic system. First hose was on top of the boom, oil started leaking from a metal elbow connected to the hoses. Removed...
    • Operator John
    • Thread
    • excavator hose bursting hose failure hydraulic hydraulic hose hydraulic leak komatsu komatsu 200
    • Replies: 11
    • Forum: Excavators
  9. H621

    Swing motor oil

    Hey there, I'm working on a yanmar vio 20 and got a new swing motor. My question is do I need to fill it with oil, or is it lubricated by the oil flowing through it? There is no dipstick and only a couple small plugs on the side.
    • H621
    • Thread
    • excavator mini motor oil swing vio yanmar
    • Replies: 5
    • Forum: Excavators
  10. Jake Erickson

    Komatsu 220-6

    Hello all, I’ve read a bunch of past posts. I recently bought a 220-6 and they advertised it had low horsepower. When I got it home it seemed to work pretty well. Until about 1/2 hour then I notice a significant drop in power, changed filters, checked banjo bolt and screen. New fuel line...
  11. erick93

    PC200LC Valve Assembly 723-47-29100

    Hi to all of my fellow heavy machinery experts and aficionados I'm on a quest to find a Valve Assembly with the part number 723-47-29100 for a Komatsu PC200 LC-8MO. Mine was damage by machine burr (attached images of the damage). I've been searching on boneyards for a used one cause a new one...
    • erick93
    • Thread
    • boneyard burr excavator komatsu pc200 salvage yard valve assembly
    • Replies: 4
    • Forum: Excavators
  12. Y

    Kobelco SK120 MKV Battery Relay

    Hi there, I have a Kobelco SK-120 MKV and I need to put a new battery relay. Anyone knows how to wire the Battery Relay or has a wiring diagram? Thank you.
  13. N

    Hitachi EX120 joystick/thumb wiring issue

    Looking for help and/or possibly a wiring diagram or schematic for a hitachi ex-120-3? Had it tore apart for another repair and now the thumb will not open or close. Both open and closed buttons on the joystick have continuity when pressed, but doesn’t seem to have power to the circuit. I can...
    • NutTech123
    • Thread
    • ex120 excavator hitachi 120-3 hitachi electrical problems
    • Replies: 2
    • Forum: Excavators
  14. 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
  15. W

    Komastu pc200-7

    Ok I have a 2001 komastu pc-7. You can start it up. Sounds great. Can operate at a low rpm and does fine. But once you you idle at a higher rpm. have a power loss, and white smokes like crazy, but will not do it unless it’s at a higher rpm. Any help will be appreciated. Thanks in advance
  16. J

    I have a yanmar and i cant get to this part so i can plug in the new hose

    ive never worked on any heavy equipment so its good to start somewhere i think. Only the first two pictures, that part i got a close up on is the one thats hard to get to. this one which is revealed when i take the top off is easy to get to Does anyone know how i could go about getting to this...
  17. Graham D

    Kobelco K905Alc

    Hello All! I have a 198_*(or 90s not sure the year) Kobelco K905Alc Excavator. I have been in the process of cleaning it up, Runs/Starts right up and the arm/bucket hydraulics function. It has around 6,000 hours of operation on it. I have very limited info about my machine and am trying to sell...
  18. R

    Case 888 EX slow crank no start

    i believe machine is 1985 case 888 5.9 cummins serial number CGG0015457 customer put new starter, cables, lift pump unit seems to crank slow, suspect hyd pump causing drag. i am unfamiliar with unit and looking for info, is there a load sensing line on pump that a stuck valve could be...
  19. J

    Case 688 Hydraulic Issue

    Hi, I read through the threads and saw nothing like the problem that I'm having. I have a 89 Case 688 excavator that I bought used with hydraulic issues. The previous owner was tracking across a field when the unit just shut off. It lost electric power. He found a bad circuit and ran a hot wire...
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