Sustained RPM's

[thcri]

Re: Sustained RPM\'s

If the tractor is fairly cold when starting I will let at a idle for a few minutes to get the oil going. Then move up to a faster idle.

murph

 

[RalphVa]

Re: Sustained RPM\'s

I've a Benz diesel that's 22 years old this year. We regularly rev it to the limit in 1st and 2nd gears: approx. 4,400 rpm. It's designed to run at maximum rpm all day long. Many do on the German Autobahns or similar roads in Italy and other countries. I know. I've been passed by them, me at about 80 them at about 95.

My 4010 maximum rpm is about 3,000 rpm. Think the 540 rpm PTO is at 2,900 rpm. I have NO problems with running at this speed all the time as long as those screens don't get plugged with debris. On my 4010, there're the outside screen plus another in front of the radiator that need to be cleaned periodically.

Small engined Volvos and Benzes typically go 300,000 miles or so between overhauls. Volvos typically won't even start using oil until around 300,000 or more miles. Some have been overhauled and have seen over 1 million miles. It's not the engine speed (higher in 4 cylinders on cars). It's lack of maintenance that kills them, or driving at too low an engine speed for the load. You can kill an engine quicker by lugging it than by revving it.

If you start your tractor in a garage that never gets below around 50-55 F, you really don't need to idle it that much when cold before proceeding with heavy work. Even if stone cold, I'd only follow the manual's recommendation of about 5 minutes.

Ralph

 

[Soundguy]

Re: Sustained RPM\'s

Let it run. Once it is properly brok in, those long hour runs will be a part of it's regimine.

Take mowing for examply. I set pto rpm on my hand throttle, and then don't slow down till the pasture is mowed.. etc. RPM + power at a given speed. So if you are doing a constant 'power' job like plowing, tilling, mowing, generating power or pumping water, etc.. then that is what you need. If you were using a loader, I'd guess you could set a lower rpm, and then use foot throttle / treadle peadle for speed/power changes.. etc.

Soundguy

 

[normde2001]

Re: Sustained RPM\'s

If this is all true, then one would have to wonder why mechanical hour meters that register 1 hour at 2400 rpm, for instance, only record 1/2 hour at 1200 rpm in the same hour of running, indicating that the engine will last twice as long at 1200 than at 2400. Could it be that they may be on to something?

 

[hobbyfarm]

Re: Sustained RPM\'s

Like Bird said: </font><font color="blue" class="small">( I like to let one idle and cool down a bit before shutting it down, but that's the only time. )</font>

This is especially true if you've got a turbo! Idling gives the turbo a chance to slow down from the six-digit rpm's at high idle to a more reasonable speed before it quits getting oil pressure at shut down. Your turbo will thank you by giving you a long service life! /forums/images/graemlins/smile.gif

 

[DaveInColorado]

Re: Sustained RPM\'s

</font><font color="blue" class="small">( I've a Benz diesel that's 22 years old this year. We regularly rev it to the limit in 1st and 2nd gears: approx. 4,400 rpm. It's designed to run at maximum rpm all day long.

Small engined Volvos and Benzes typically go 300,000 miles or so between overhauls. Volvos typically won't even start using oil until around 300,000 or more miles. Some have been overhauled and have seen over 1 million miles.
Ralph )</font>

I bought a 1980 Mercedes with 160k miles on it a few years ago. Drove it 6k miles for less than a year before I realized the engine was toast - rings and valves shot. Every brand has its lemons.