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  1. Chris_M

    Cat 259D Intermittently Shuts off

    Hi everyone, joined the forum a few months back and this is my first post. Our company has been working on a 2017 Cat 259D that will intermittently shut off, dash stays on. You could run it for a couple hours sometimes and other times 20-30 minutes and it dies, like your turning the key off and...
  2. 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
  3. Mzdiesel

    Linkbelt 250x4

    Can anybody help me out with a Linkbelt 250x4 schematic? I just need to know wiring for fuel transfer/ priming pump. I’m only getting .2v with key on and pump is burned up. I have previously traced wires but this machine is in the way of the pipe crew and I need to repair it fast. I’f you can...
  4. 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
  5. J

    Cat 416c losing drive shortly after driving.

    Hi everyone! Im new to the forum, but i have frequented it a bit over the years. So heres my deal. Ive got a cat 416c (4zn1-up) i got in a non running condition from my in-laws a few weeks ago. It sat for 10 years, but i did start it up 6 years ago but immediately shut it off as the stabalizers...
  6. C

    Cat d4g jumping to right

    Hello everyone, I have a cat d4g lgp. Ser.#tlx00345. 7800hrs I’ve been chasing this issue for a while now. The machine likes jumping to the right, as in the left track speeds up up for a sec and slows down, constantly. If you let it go you’ll just go in circles. And it’s violent. Funny thing...
    • Csocha
    • Thread
    • cat d4g d4g lgp speed sensor
    • Replies: 9
    • Forum: Dozers
  7. H

    CAT D3G XL Final drive leak

    I have 2005 CAT D3G XL , it is seaping oil at housing where the final drive assembly bolts to the dozer. To my understanding there should not even be any type of fluid able to get to this point. Final drive has pressure once ran, and no metal on magnet.
    • Hodevelopment
    • Thread
    • cat caterpillar d3g d4g d5g dozer final drive
    • Replies: 0
    • Forum: Dozers
  8. T

    CAT 304 or Bobcat E48?

    Hey all! Rental fleet owner here. I, by no means, am an operator. The extent of my operating is loading on trailer's and demo'ing for customers. Looking to add 2x 4-ton Mini-Excavator's to my fleet this year. We are in Colorado so pretty hard, dry soil with clay and rock underneath. I have...
  9. Tom Sticpewich

    1977 CAT 930 ENGINE DIAGNOSTICS

    GDay all I don't have any other details as I haven't been to see the loader yet but it is way of in the bush (6 hours drive away) and I want to get some testing procedures for this machine. Engine is missing very badly, apparently water was observed coming out of the exhaust but it had been...
  10. J

    Cat 311B Tracks Won’t Turn when Warm

    I have a 311B Excavator when cold will allows me to turn the tracks but as it gets progressively warmer I lose the ability to turn and only allows me to travel forward and backward. Changed the filters and the oil. Anyone have experience with this type of issue? Would like a direction prior to...
  11. R

    IT28F Hydraulic Fluid in Transmission

    I’m looking at a IT28F that has the hydraulic fluid disappearing from the tank only to show up as an overfilled transmission. I’m thinking it’s going from the pump into the transmission. If that’s the case are there any long term issues with the transmission? I believe Cat calls for their TDTO...
  12. 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...
  13. B

    Cat D8T

    Serial PreFix FMC003 Fault code 2458-2 DPF #1 Differential Pressure Sensor : Erratic, Intermittent, or Incorrect What is the troubleshooting for this code
  14. H

    CAT 242D

    I have a cat 242D with electric coupler that won’t unlock. I thought I had a bad switch but it’s not. I have 12V to the unlock wires only when the unplugged from the motor. With Wires plugged in and lock switch activated I have 12V power at lock wire. -1.9V at unlock. When the motor is...
  15. B

    Cat 305 tracking issue

    I have been having the issue that is very intermittent of when tracking around the machine bogs down to basically a low idle and slows down to a crawl. It’s only when I’m tracking so I was curious if it sounds like a pilot valve? Serial number: H5M02082
  16. J

    Cursed CAT TH560B Wont go into gear unless Stabilizer is moved

    So I am having a hell of a time getting a CAT TH560B (SLG01314) into Gear. So when we bought the machine the hydraulics weren't working neither the transmission, For hydraulics we replaced the valve and its all good to go. Now the transmission would not go into gear, Frame level was...
  17. B

    CAT 950GC derate

    Hello everyone! Have a CAT 950GC loader that derates and flashes the following codes -37 4682-3 1 (doesn’t cause derate) E1044 (causes derate) Without any scan tools it seems to be clogged system somewhere or faulty turbocharger wastegate/regulator. Any input on what it could be possibly and...
  18. E

    CAT 420 Fuel system issues (Gas in fuel tank)

    Good morning, I'm in an interesting situation with a 420 backhoe, a few days ago this machine arrived and one of the yard guys said it ran 'funny'. I went to go drive it and found a number of issues with it. For one, the serpentine belt had ripped and was laying on the ground next to the...
  19. H621

    C15 Acert SDP

    I have a C15 Acert SDP that is really making me scratch my head. It keeps shredding serpentine belts. The ac compressor pulley is slightly forward causing the belt to jump a groove on the fan hub towards the front. Ac compressor, fan hub, idler smooth, idler grooved, tensioner, and belt are...
  20. R

    Cat 972H loader no cut in pressure on hyd fan

    There’s no cut in pressure on the hydraulic fan side with the accelerator pressed down and the fan demand solenoid unplugged. New fan demand solenoid and compensator and fan
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