I'm having a problem with my little d3b that's been a great little machine. I bought it knew it was using transmission fluid, I knowing the guy I purchased it from well and he told me it used it the entire time he owned it. I have always put about a gallon in it every 20 hours. I had plans to work on it this winter when we're done with it for the season but here we are.
Yesterday while using the machine to clear some mud and yank out a stuck tractor it all the sudden wouldn't move in reverse. This happened suddenlyl, I had been using the machine for about an hour then all the sudden no reverse. I put it in 1st and back to neutral a few times and then it would creep in reverse until the engine was under a load. I decided to let it cool down and wait until today to mess with it because it is about 20 degrees warmer out today.
When checking it over today it was a little low on transmission oil but not bad, I topped it off with 30wt motor oil. Reverse will work on flat ground until the engines under a load. Hit a steering break and it stops dead in its tracks. The dozer seems to be working fine in all forward gears. I can bury the blade and it will spin the tracks going forward.
I pulled the metal filter out, some minor crud and a small amount of metal flakes could be found. I cleaned it and reinstalled it. It SEEMS like it's a little better but still not right. Also it seems like the transmission oil is a little foamy / air bubbles when I check it. Just seems like the clutch isn't grabbing good in reverse if I had to guess. I'm more of a "parts changer" than a mechanic but try to do most things on my own. I'm hoping that one of you tell me it's something simple but I'm guessing it's not. Any ideas? I have a manual and it looks like it's time to start checking pressure on the valve bodies?
Yesterday while using the machine to clear some mud and yank out a stuck tractor it all the sudden wouldn't move in reverse. This happened suddenlyl, I had been using the machine for about an hour then all the sudden no reverse. I put it in 1st and back to neutral a few times and then it would creep in reverse until the engine was under a load. I decided to let it cool down and wait until today to mess with it because it is about 20 degrees warmer out today.
When checking it over today it was a little low on transmission oil but not bad, I topped it off with 30wt motor oil. Reverse will work on flat ground until the engines under a load. Hit a steering break and it stops dead in its tracks. The dozer seems to be working fine in all forward gears. I can bury the blade and it will spin the tracks going forward.
I pulled the metal filter out, some minor crud and a small amount of metal flakes could be found. I cleaned it and reinstalled it. It SEEMS like it's a little better but still not right. Also it seems like the transmission oil is a little foamy / air bubbles when I check it. Just seems like the clutch isn't grabbing good in reverse if I had to guess. I'm more of a "parts changer" than a mechanic but try to do most things on my own. I'm hoping that one of you tell me it's something simple but I'm guessing it's not. Any ideas? I have a manual and it looks like it's time to start checking pressure on the valve bodies?
1986 Cat d3b LGP 24y with 3 forward 1 reverse gear, reverse issues!
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