Hey guys. Loving my new machine but I can't find any info on RPMs. I used it for the 1st time yesterday grading our community road and there is a pretty big hill on the road. I was pulling the dirt at about 15-1700 RPM but it really struggled going up the hill. I did find when I bumped it up to 2k things improved greatly. So I figured I was just operating it under where I should have and straining the whole driveline. I like to take really good care of my stuff, so is there safe range to run these motors? I notice there is no marked redline or anything on the tach but don't want to assume anything and I don't like to run my motors hard...but really dont know what "hard" is for this motor. Thanks!
Quick little question about my new TC35D
- Thread starter raw23062
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lhfarm
Veteran Member
Operating a hydro was a very different experience for me when I got my TC40DA. I think I even posted here about it being under powered. I was running the engine at too low an RPM and found when I ran the engine at the higher speed it had all the power I needed.
Someone will give you a more technical answer, but don't fear running the engine all the time at the higher RPM. That is part of the design.
Someone will give you a more technical answer, but don't fear running the engine all the time at the higher RPM. That is part of the design.
5picker
Bronze Member
I found the operating experience on my TC33D a bit different from other machines I had run when I first got it too. I tended to use a lower gear range with the engine RPM's lower to get my work accomplished. Like you, I thought I probably shouldn't be pushing the RPM's.
I've since come to find I can do just about anything I want by simply giving it more throttle. They're pretty bullet proof and designed to run.
I've since come to find I can do just about anything I want by simply giving it more throttle. They're pretty bullet proof and designed to run.
jinman
Rest in Peace
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I don't know if you are using an angle blade or boxblade for grading, but you surely need to be in Lo range. Lo-rabbit will work for most grading tasks, but if using a boxblade that gets full of gravel, you might find a downshift to Lo-turtle is really helpful. Keep the rpm above 2000 anytime you are blading. If you need more power, feel free to push it up to 2500-2600 rpm. Your peak hp is achieved at around 2600 rpm. You should also see a small green "540" light in the lower right-hand portion of your instrument panel. If you go above 2700 rpm, the 540 light goes out and a red 600 light appears. These lights are just to help keep you in 540 PTO range if you have a cutter or some other PTO implement attached. As far as over-revving the engine, I don't think you can do that without going 2800 rpm. Your governor should fully protect you from ever over-revving your engine.
PERFECT! Thats the info I was looking for. Im using a box grader and was at around 1600=1700 rpm....just taking it to 2000-2100 made a huge difference. Cant wait to see how it acts around 2500! Just FYI, I was absolutely in low range. Thanks guys!
roadhawk
Silver Member
On my TC40D I rarely do anything under about 1600 RPMs and that's usually only when using the FEL to dig fresh hard dirt, or just driving around looking at things and not working. While a diesel makes good torque at a low range of RPM, one of the worst things you can do to any diesel it to let it lug at too low an RPM. Give it some revs and let it do its thing.
