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komatsu

  1. 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: 22
    • Forum: Compact Excavators
  2. KomatsuMiner

    The Benefits Of Using One Brand Instead Of Multi-Brands For The Mining Fleet

    Hello There I suppose to prepare a rich presentation on The Benefits Of Using One Brand Instead Of Multi-Brands For The Mining Fleet (e.g. to deal only with Caterpillar for your machinery, or Komatsu). After days of searching, I couldn`t find anything presentable. Could you please lead me...
  3. M

    Komatsu pc35 mr2

    Komatsu pc35 mr2, has weak drive motors after operating about ten minutes. This can be corrected by tilting either joy stick right or left, for some reason this throws full power to the drive motors while traming the machine, this makes be believe the drive motors are fine, hydraulic pump has...
  4. H

    Cummins 855 coolant foaming

    Hi all, We have a Komatsu 85-18 bulldozer with a cummins 855 engine. The engine has recently started foaming up the coolant (we use fleetguard rust inhibitor and rainwater) out of the radiator cap and over the bonnet after approx 15min of operation. A ridiculous amount of foam comes out and can...
  5. B

    Komatsu PC90 Overheating Issue

    Hello everyone, I have a Komatsu PC90 that overheats after about an hour of use. I have changed all cooling related parts such as new radiator, thermostat, cleaned between radiator and oil cooler, inspected fan and foam seals around fan. Nothing has not improved it. I can run without issues if...
  6. Andrew Navarrete

    Komatsu PC210LC-6E Very Slow Hydraulics

    Hello, I just recently purchased a beater of a machine. It s a Komatsu Excavator PC210LC-6E with a 6BT cummins. When I firsted picked it up it was working fine a little slow but it worked. Now she barely moves has no power to dig push spin or walk. I had a mechanic take a look and we measured...
  7. D

    PC128uu-1 hydraulics gone haywire

    Hello all, new to the forum, but just wondering if I might be able to get some diagnosis help? I have very specific symptoms that I'm hoping someone smarter than me will be able to pinpoint straight away... I have a Komatsu 2000 model PC128uu-1 which out of the blue stopped working properly at...
  8. S

    Komatsu PC75UU-2 Injection Pump Timing

    My 1994 PC75UU-2, Serial number 8310, Engine Model # 4D95L-1, was belching black smoke and spilling fuel into the crankcase. Air filter was clean. Started well, ran well, but smoked under even a light load. Injectors were just rebuilt. Decided it was the Injection Pump. Took it off, sent it away...
    • Smedlow
    • Thread
    • injection pump komatsu pc75uu-2
    • Replies: 4
    • Forum: Excavators
  9. J

    Komatsu PC75uu-2 pump parts

    I just picked up an older Komatsu PC75uu-2. The previous owner said it needs pump work. Took it home and sure enough, I got 2,200 psi on 1 valve manifold block and 0 psi on the second valve manifold block. The third manifold block comes off the gear pump at the end of the piston pump and that...
    • Jon Bradtke
    • Thread
    • excavator excavator pump komatsu pc75 pc75uu-2 pump parts
    • Replies: 24
    • Forum: Excavators
  10. Karabaja

    Komatzu D115AX-6

    Hello, is there anyone who had a problem with pistons in proportional valves? (they got stuck as soon as machine reaches its working temperature)
    • Karabaja
    • Thread
    • d115ax-6 komatsu proportional valve
    • Replies: 0
    • Forum: Dozers
  11. gem1971

    Komatsu PC350 not starting

    Got a pc350 it just wont start the next day after operation. Had already send the fuel pump and injector check by calibration center still wont start. Its shorts that rail pressure is much higher with the rail pressure command. Any idea what would be the other cause of the problem.
  12. M

    Komatsu PC220-5 no power and stalls

    Hello all, I recently resurrected a late 80's pc220-5 serial number 35321. Machine has a magnet on it for most of its life, so i had to find a bucket cyl to make it a digger again. I found a used cylinder off of a pc200 and put that on it. I'm having some issues that i can not figure out, maybe...
  13. S

    Komatsu PC200-3 does nothing with turn of key

    Good morning folks. Looking for some help regarding my PC200 Komatsu excavator. I was running it yesterday and it was operating fine, broke for lunch and when I returned to the machine and turned the key nothing happened. No clicks no nothing. Tested battery and putting out over 24, tested wires...
  14. Seans problems

    2005 pc-40mr 2 broken dipper arm

    I'm looking for a dipper arm for the titled mini excavator. I was set to sell this thing and one of the guys zigged when he should have zagged. any help would be great, thank you.
  15. PbBelly

    Komatsu Excavator hydraulic issue

    My cousin is running a Komatsu PC138 USLC-2EO excavator ser# 2078 Product ID # KMTPCO44T044T01002078. He bought it 10+ years ago with 1,700 hours on it. From day one it has had a problem not steering when tramming once the machine is thoroughly warmed up. It works fine for the first couple of...
    • PbBelly
    • Thread
    • excavator hydraulic pressure problem komatsu pc138
    • Replies: 31
    • Forum: Excavators
  16. S

    No hydraulics on pc75uu

    first the alarm would sound and lock-out the hydraulics if the bucket got too close to cab, now it fires up no problem, but no hydraulics at all (boom,blade, track,etc.) I have checked the fuses, tried the toggle at the fuse box, the toggle under the seat(right-leg), all fluids are good, no...
  17. M

    Komatsu PC300-LC3 - won't swing, and identifying a few parts

    Hi all, Round one (near total loss of hydraulic power) turned out to be an easy fix of just a clogged strainer thanks to y'alls help, so really hoping I get lucky a second time while I continue trying to sort out this old beast. 1) When I move the stick to swing the cab around, I can hear the...
  18. J

    Snow: Komatsu SK05 vs TCM 315 Bobcat vs Toyota Jobsun 6 2SDK6

    Hello everyone! JackSpareO here! I'm currently looking for an after-market Skid Steer, and have narrowed down my choices to these 3 readily available units. The reason I'm purchasing one of these machines is to remove a copious amount of snow in the winter. I'll have a few weeks at best to...
  19. R

    Komatsu pc200-8 wont start need help

    Hi there i just finish overhaul my komatsu pc200-8 and showing e15 ca428. I have clean out all the cabel and sockets i also have a newly service injectors all 6 of them, cant figure out where this error comming from. Thanks
    • Ritzzz
    • Thread
    • engine excavator komatsu komatsu pc200
    • Replies: 2
    • Forum: Excavators
  20. R

    Komatsu D-155AX-3

    Looking for someone to help me find where I can get a HMT controller tested. Went through trouble shooting guide and concluded that the HMT controller is bad but will cost $4300 and would like to get it tested before expending this money.
    • Russell Ludwig
    • Thread
    • d155ax dozer electrical help komatsu wiring
    • Replies: 2
    • Forum: Dozers
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