I recently purchased a new L3800 with BH77 backhoe. During breakin I'm keeping the rpm's down below the 2500 range, usually running about 1500 rpm. I've heard others that have their tractors well past break in that they never run past 1500 rpm. What does everyone use for standard day to day rpm? I have HST if that matters. Just don't want to sit there at 2500 rpm running backhoe if it doesn't do any good and wastes gas. But would like to break it in properly as well!
L3800 Operating RPM's
- Thread starter twinnine
- Start date
After the break in is over you can feel safe to run it at the rated rpm's all day every day if you need the power. For propper operation your backhoe is designed to be used at the rated rpm's on the tractor. This is how I do mine. If I'm in a tight spot and need the backhoe to be a little slower and a bit more forgiving I lower my engine speed. At 1500 everything will work but it will be very slow and weak. In hard digging you can forget it. I just regulate the rpm's according to each situation I'm in. We had a diesel water pump were I worked and would pump water out of the creek in the dry part of the summer. It had a Kubota diesel on it and turned 2150 rpm. At times it ran 24/7 and only got shut off to service the engine and then fired back up. I have seen it run for 2 or 3 months straight. Unless you happened to buy a lemon just keep the tractor serviced and run it. You won't hurt the engine running at high rpm's. If anything, it harder on a diesel to lug it than it is to run as hard as it will turn.
thanks dog! By "rated" operating speed, I'm assuming you mean 2600 or the PTO operating speed marked on the tach. I have almost 15 hours on it now so will bump it up some next time I'm out and see how I make out. I try to vary it within a couple hundred rpm's anyways during the first 50 but maybe it's time to up it to 2000-2200 range and keep varying it and put it through some short bursts of real work.
thanks again!
thanks again!
The PTO speed is what I meant. I don't turn mine over that anyway. I figure if that's where it builds the power to run the PTO then that's all the power I need. The biggest thing that will hurt a diesel is lugging it. With 15 hrs on yours I think it would be fine to raise it on up some. Try to keep from shock loading it and you should be fine. I always have liked to break mine in doing something where it could maintain a constant rpm for a longer period of time. Mowing or bushhogging in light material is a good choice.
You'll be at the fun 50 point where you get to drain everything. Just don't be surprised at what you see come out of your baby. It will be nasty and make you feel like you're panning gold when you see all that shiny metal flake in the oil. The front end on all mine has been shocking.
You'll be at the fun 50 point where you get to drain everything. Just don't be surprised at what you see come out of your baby. It will be nasty and make you feel like you're panning gold when you see all that shiny metal flake in the oil. The front end on all mine has been shocking.
Twinnine,
I was pretty concerned when I read my manual and said to avoid heavy work for the first 50 hrs and like you kept the RPM's to the min for the first 10 or so hrs and have been working it a little harder with each hour since doing basic loader and scraping work. I can tell you one thing though after using the MMM for the first time this weekend and bringing the RPM's up to the PTO mark of 2600 it runs even better now. I was so quiet an smooth it was unreal! The mower at that speed was almost silent too, I cant tell you how impressed I was with the whole afternoon mowing the grass.
Bulldog is bang on, these things are made to run for long periods and deliver all the way there. He should know he's had a few.
Enjoy the new toy~!
M.
I was pretty concerned when I read my manual and said to avoid heavy work for the first 50 hrs and like you kept the RPM's to the min for the first 10 or so hrs and have been working it a little harder with each hour since doing basic loader and scraping work. I can tell you one thing though after using the MMM for the first time this weekend and bringing the RPM's up to the PTO mark of 2600 it runs even better now. I was so quiet an smooth it was unreal! The mower at that speed was almost silent too, I cant tell you how impressed I was with the whole afternoon mowing the grass.
Bulldog is bang on, these things are made to run for long periods and deliver all the way there. He should know he's had a few.
Enjoy the new toy~!
M.
Thanks to the both of you for clue'n me in! I'll start to increase the revs a bit and put some consistent load on the beast hoping it will open up the power a bit and break in properly!