How many hours before rebuild????

[Woodbeef]

I know that this question is dependant on many variables.......

Over on one of the US based boards the deeroids are bragging that JD motors are superior because they seem to go 7-8,000 hrs before needing a rebuild,and that Cat and Cummins seem to need rebuilds at 4-5,000 hours. To me any modern engine should be able to hit at least 10,000 before rebuild with only routine maintenence

I know of a Valmet that has over 16,000 hrs with out a rebuild. I've also heard of Fendt and Steyrs going over 15,000 hrs before rebuilds.

So what do you guys think?

[kenjar]

Those darn deereblinds bragging again!
You are right any modern diesel engine should go 10,000 plus hours before a rebuild.
My neighbor has an IH with 13,000hrs
I have a tractor that I rebuilt and have put over 10,000hrs on
Maintenence is the key.

[leemsutton]

I would have to agree with you guys that maintenance is the key to a long life of machinery.

However maintenance is not what it should be over here. People still tend to sell at about 5000 hrs. Then the new buyer goes through the tractor with a fijne tooth comb and irons out any problems.

I think a machine should be serviced every 250-300 hrs to make it last but if you think about it over 10,000 hrs @ approx £100 per service (including oils etc) that amounts to an amazing £3663 UK pounds!

So is that cheap or is that expensive?

I am ashamed to say it but we had a Case IH 956 XL about 5 yrs ago. We had it for 6 yrs and sold it with 6000 on the clock and the only service it had was its original 250 hrs by the dealer!

No oil change or nothing for its 6 yr life and it never went wrong. Its still going now just down the road although it now is regularly serviced.

So we saved ourselves £2000+ UK pounds by not servicing!

However I am now happy to say that all our equipment is now serviced at 300 hr intervals and we currently have 2 5150's nearing the 3,000 and 4,000 mark repsectively and they are here to stay for a while.

Lee

[[e-mail]]

Those JD guys are dumb. Your'e right about that 10,000 hrs.

We have put 14,800 hrs on a Zetor 4.5 litre 4 cyl engine of a URII tractor, without rebuild. It 'died' suddenly because one of the pistons got stuck. when the engine dropped dead, you could start it and continue work. We got rid of it when the intervals between these "engine-drops" gor closer and closer...
(the badge on that tractor said Ursus C-385A, but the engine make was Zetor)

Did you know we have had JD long ago??

[Laapa]

Hmmm, this post might put me right back in to Deeroid section but I must say the Deeres we've had and missused for 8000h and 10000+something (changed meter a while back) have had wonderfull engines.
Our prevoius long term positive experience with Deere engines was one of the things that made us go green when deciding on a 7710, another reason was our previous experience with red-tractor engines....

[HPP]

It´s dependant on many waiables that´s for sure. It´s of course also a question of what you mean with "rebuild".
I´ve seen Fendts with 17-20.000 hours without rebuilded engines. The danish importer has recently found the first Fendt he ever sold, a 612 from 1976. It has 27.000 H and is said to never having had any repair of either engine or gearbox. He now keeps it in his showroom!
But, I´ve also seen a few Fendts where the the O-rings of the cylinder-linings had to be replaced after about 3-5.000 hours.

[[e-mail]]

morjes!  

my name is mika. im from finland. and my english sucks!


in finland we drive valmet motors over 10000h before rebuilt. 15000h whit out rebuilt is normal.

[[e-mail]]

some records in finland (i heard):

valmet 505 over 30000h!
valmet 805 25000h (rebuilt 12000h)
valmet 8400  17000h
valmet 8550 16000h (drived in 4 years)
valmet 755 14000h (my frend tractor, rebuild 14001h)
fiat 880 15000h
fiat 100-90 15000h
fiat 110-90 30000h
fiat 780  16000h
fiat 1000super 22000h
ursus 1204 17000h (rb 11000h)
deutz dx120 35000h! (rb?h)

[[e-mail]]

Putting lots of hours on a tractor isn't so hard if you make 10 hrs a day. Only "cold hours" make a tractor wear.

I say, when you start an engine and let it run 24 hrs a day without stopping the engine, with good maintenance and no overheating , it will run 50,000 hrs.
(only the fuel dispensers should be changed every 10,000 hrs, i think)

[Si]

A local a farmer has a JD 4955 lovely tractor I went to Quote him to tade it in, noticing only 3,500 hours on the clock, I ask why he was trading it in, why? becouse he had to rebuild it last year!! as for maintaence he has a full time fitter, and is very carefull with his machinery. Yet today I traded in a MF 3095 (I know I been harsh on then before) with 9850hrs. It drove well, and the engine and gearbox were fine, even though I forgot how slow 30kph was!!!
Cheers
Simon

[[e-mail]]

Hi,

Is the engine of that 4955 run in?? i dont think so. If a new engine had carefull first 50 hours, it should be punished to raise them well. ( i think i am quite good at it..)

As a retired employee of our dealer once told me, when in 1984 the Zetor engines with 102 mm bore and four piston rings came out, they kept consuming excess oil at some farmers. The problem was that they did not ran in, because those farmers never let their engines work hard.

The importer used to come over with a dynatester, to punish them on the PTO for three hours with bad fuel and oil with an additive, so that the piston rings HAD to wear, and 'run in' to the cylinder liner.

Does anyone have similar experiences with engines which are not "run in", and keep on using lots of oil?
(when oil goes along the piston rings)


BTW, Does anyone know how to copy video8 tapes to computer AVI or MPG movie??
I have some great tractor punishment:o videos i like to share with you...

[[e-mail]]

Oh yes,

Not every tractor counts the same hours.
some count the analog engine hours, if it runs an hour on 1,500 rpm, it's counted as one engine hour. If it runs at 2,000, it counts more.

Other count digital, and count real clock hours.

Also with the analog clocks, the counted hours are totally depending on the way of counting.

[[e-mail]]

we got a tip on running in our mf 6280. it spent its first 2 hours mixing slurry before being linked up to a 3m rabe 1000rpm power harrow. runs fantastically now with one year and nearly 400 hours gone. our local contractor bought a john deere 6410 just before us and has 3000 hours and the engine blew up!

[Si]

The 4955 block was shot, causing the liners to move a common problem apparently.
Cheers
Simon