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  1. J

    Komatsu D31 Transmission trouble

    A month or two ago my 1985 Komatsu D31p-17 slowly lost pushing power and then stopped died in its tracks. The engine was still running strong it just lost power from the transmission. I read my work shop manual and the trouble shooting section told me to change out the transmission oil filter...
  2. J

    recommended best older small dozer

    My vote is the komatsu D31. Im surprised no one else has chimed in for the Komatsu. To be honisted my D31 is the only dozed I have ever operated so I'm probably not the best one to get advice from. I have to say I really like my 1985 D31.
  3. J

    Alaskan Logging Equipment, Left to Rust

    Man I would love to have one of those old trucks. Especially the one with the low-boy hooked to it. Thanks for sharing.
  4. J

    Komatsu D31 Problems

    I put the new transmission filter and O-rings back on Friday and to my surprise it fixed the problem. My dozer is back up and running strong. Thanks to the guys who replayed to my post with helpful tips. :)
  5. J

    Komatsu D31 Problems

    I pulled the filter that is located inside the transmission and it didn’t look as bad as I was hoping. I ordered a new filter and O-rings and I will be putting it back together this Friday. I hope this fixes the problem but I’m thinking this is going to be a pump problem not a filter clogging issue.
  6. J

    Komatsu D31 Problems

    My dozer is a 4 cylinder engine and John C. is right I have three dip sticks under the seat one for right steering clutch, one for left steering clutch, and one for the transmission. I have been studying my work shop manual the last three days and my first plan of attack is to check my pressures...
  7. J

    Komatsu D31 Problems

    Because the dozer is an older model I never run it longer than 4 hours without stopping and checking my oil levels. I checked all fluids Friday morning before starting work and when I stopped for lunch I let the dozer sit for 20 minutes and checked my fluids again and found my middle dip stick...
  8. J

    Komatsu D31 Problems

    The dozer is a 1985 Komatsu D31p-17. Thanks
  9. J

    Komatsu D31 Problems

    Today my dozer started making a winding nose coming from the transmission area under the seat. Shortly after the nose I lost the ability to turn the dozer and the dozer would not track forward or backward. I turned the engine off and let the dozer sit for about ten minutes and started it up...
  10. J

    Your first piece of equipment owned or operated was?

    Bought and run my first six months ago, it's a 1985 Komatsu D31. Since then I have bought a track hoe, track dump, and stump grinder. This stuff is addiction and my wife is ready to kill me.:D
  11. J

    Who does what?

    I got started in the land service business when I bout 24 acres. I wanted to do all the work my self so I bought a 1985 Komatsu D31 dozer, 1995 Komatsu PC50uu-2 track hoe, 1996 Yanmar CR50-2 Track Dump, and a Stump grinder. I figured since I had the equipment I would do some weekend worrier...
  12. J

    "New guy", could really use some input and advise on buying my first dozer!

    I was in the same boat your in a few months ago buying my first Dozer. It took me seven months to find what I wanted in my price range. I ended up buying a 1985 Kamatsu D31. Hang in there you will find what your looking for.
  13. J

    D85-18 losing tranny oil

    I found my transmission leak today. I pulled my rear skid plate off and could see that the oil was leaking out close to wear the universal joint mounts to the transmission. I pulled universal joint off to get a better look and could see right wear the oil is leaking out. I took a look in my...
  14. J

    D85-18 losing tranny oil

    Hi My Komatsu D31-17P is doing the same thing. I'm loseing about two qt of trany fluid every four hours of run time. I see very little spill on the ground not sure were it's going but hope to find out this weekend.
  15. J

    Finish Grading Tips

    I just bought a 1985 Komatsu D31 and Im haveing the same problem with finish grading. This is all good information. Thanks
  16. J

    Where to buy CAT D7 or Komatsu D85/D135?

    Hi SProck One of my favorite places to look at dozers for sale is on eBay. I will do a search on dozer and then I will have my search list organized from highest cost to lowest cost. I do that so to weed out all of the dozer parts and dozer toys that will show up on my search. Usually the first...
  17. J

    Section for komatsu d20,21 and similar grey market dozers

    New Member Hello I'm a new member I bought my first dozer last week. :) It is a 1985 komatsu D31-P. I have 25 acres that I bought about three years ago and I have a lot of work ahead of me but it should be fun work. Last weekend I started on my two acre dove field in the back of my property...
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