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  1. RnR LAMF

    Cat 420f Joystick aux Fault

    Hello everyone Im working on a Cat 420f Backhoe s/n jwj01987 its intermittently throwing voltage codes for the extendahoe/aux switches. They will randomly work sometimes then not, I think I may have a wiring issue but I don't have a schematic, checked all fuses and relays. The codes i'm...
  2. G

    30 ton sprocket puller/pusher

    I have a 30 ton Cat sprocket installer/puller I am looking to sell. Works great has a couple original adapters and a few home made or modified adapters. Located in Washington state. $3000
  3. H

    Cat 320DL ac code’s evaporator

    On a CAT 320DL Would you have to pull the whole system out to clean out the evaporator or is there a easier way getting to it, to see if it’s dirty and or cleaning it? I’m having ac codes e43 e44 e51. I have no cold air and I can assume has something to do with that?
  4. N

    Concerns before my first drive of sitting Cat d6 9u

    Hello everyone. Thank you for sharing your experience. This forum has helped me greatly to get to this point. I bought a property that included a 50's or 60's d6-9u (I am pretty sure). I have gotten the pony, and main engine running and confirmed the hydraulics lift. Woohoo I am running...
  5. R

    CAT 277B skid steer cranks but won't start

    I have a 2006 CAT 277B (CAT0277BCMDH04755) with about 2,000 hours on it. It's always cranked right up and run strong. A couple weeks ago I had been using it for about 10 minutes (wasn't cold outside, probably 50) when it started bogging down on throttle (felt like the tracks were stuck in the...
  6. H

    Excavator 345D L CAT overheating problem

    Hello everyone, I’m new here, so I’ll get straight to the point, I have an excavator 345D L CAT 2012 that is overheating for unknown reasons, so I’m gonna state what I did to solve this issue but nothing worked. 1- full service all filters, oils , coolant, and even in tank filters hyd. 2-...
  7. R

    CAT 277B Panel Lights Not Working

    A few months ago I was having some electrical issues (I was melting batteries and the machine wouldn't start). Long story short, it was a bad alternator. However, during the process of trying to diagnose that issue, my panel lights also kept blowing their fuse. So like an idiot I tried putting...
  8. Andrew G.

    D6C 76A Starter

    Have a customer that has a D6C 76a Dozer, Engine number (7M4400) and housing number (5m7844). He bought the dozer with no starter in it as the previous owners were still working on it. Need help finding the correct PN for starter as he has had no luck with multiple starters, serial number for...
    • Andrew G.
    • Thread
    • 76a cat caterpillar crawler d6c dozer starter
    • Replies: 10
    • Forum: Dozers
  9. D

    Need manuals for old excavator

    I have an E120b cat 1990 the serial number is 7NF05014 I purchased an operation and maintenance manual for it by the serial number and it doesn’t have anything I need or just would like in it. Any pointers on a reliable source for manuals I’d like to have the operation and maintenance manual as...
    • Dante Lomelo
    • Thread
    • cat catapillar e120b excavator manual parts repair service
    • Replies: 1
    • Forum: Excavators
  10. Connor Gardiner

    2020 Cat 299D3XE, Lemon?

    P.S. Machine had already been sent to the dealer which diagnosed it and stated that after being run under (vigorous) testing the machine would not repeat the trouble code and advised machine was fine. I recommended a new DEF Injector be installed into the SCR system. EXTREMELY disappointed with...
  11. J

    D9G Transmission issue

    I recently blew a oil pipe from the bottom of the trans to the oil cooler. Replaced with a hose I had made with the factory pipe ends. Filled the trans back up and now the dozer will move strong for about 50 ft in either direction then the engine labors and it will stop. I have checked for...
    • Jason1297
    • Thread
    • cat caterpillar d9g dozer
    • Replies: 0
    • Forum: Dozers
  12. C

    Heater issues 299D3

    Hello all, need some help. I have a 2020 CAT 299D3 XE that I use primarily for land management/forestry. During the winter I use it to run a CAT Snow Blower. This winter, the heater has been giving me issues. It will at times blow hot/warm, but it will then blow cold with no warning. In can...
  13. D

    Help with E120b Cat auxiliary hydraulic line setup

    I recently purchased an e120b caterpillar excavator I would like to get a hydraulic thumb but I have no auxiliary hook ups so I was wondering if someone can help me out
    • Dante Lomelo
    • Thread
    • attachment auxiliary cat catapillar e120b excavator hose hydraulic thumb
    • Replies: 6
    • Forum: Excavators
  14. C

    Cat 12h no gear, not moving

    Can place unit in any desired gear and it won’t budge. Have codes for trans selector lever and then another for Tran indicator light open circuit. The selector code is stored until activated then I get an active code. I’m guessing it’s the selector lever but needing some reassuring.
  15. simon griffiths

    CAT D4K

    Hi All Does anyone have workshop manual for the C4.4 engine specifically torque settings etc?
  16. J

    Switch controls on Deere Backhoe to Cat controls. Help.

    I am trying to convert my 70D backhoe controls to caterpillar controls. Any help with changing it? ID number CK070D
  17. WesMohler

    Help! Cat D4D SN:84J798 Information and Advice

    I am new to equipment restoration and need help identifying my Cat D4D. (See Pics Below) Original SN: 84J798 At some point, a previous owner stamped a "Z" over the "J" but I am not sure what this means. Need help please. Current SN: 84Z798 A few things I think I know... This cat does not...
    • WesMohler
    • Thread
    • advice cat d4d restoration serial number serial number decoder
    • Replies: 15
    • Forum: Dozers
  18. B

    2006 Cat 277B Electrical Problems

    I bought this machine about 2 months ago and it ran great. About 2 weeks ago I got into it to do some work and it was dead. I hooked my truck up to the battery and the power and guages came on but it just clicked when I tried to start it so I assumed the battery was totally dead. Went ahead and...
  19. S

    Cat 924H 3rd Valve

    Hello! I recently purchased a 2009 cat 924h. When bought, the 3rd valve hydraulic lines were capped off on the boom (I am assuming they were never used). I bought the lines and tubes to route the 3rd valve lines from the boom through the quick attach. I hooked up my Kage hydraulic angle plow to...
  20. Boreal

    CAT 252B3 losing power when below freezing

    I have a 2012 CAT 252B3 with 2,100 hours on it and C3.4 engine. Since our temps have dropped below freezing, I've been having intermittent issues with losing power and smoking. It happened this past Monday when I went out to use it for moving snow. It was about 20*F out and it started fine (I...
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