Engine hours before rebuild : New Holland Tractor Review  -- New Holland Tractors Discussion Forum and Review Engine hours before rebuild : New Holland Tractor Review -- New Holland Tractors Discussion Forum

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 12-07-2002, 23:40 Post: 45859
KH
2002-12-07 23:40:39
Post: 45859
 Engine hours before rebuild

Hello, what is an approximate of engine hours beore worrying about an overhaul(TC33D)? Also, what would an approx. cost for this service be? Thanks






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 12-08-2002, 06:29 Post: 45863
TomG

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 Engine hours before rebuild

It depends on maintenance and use and the particular engine. I don't know about TC's but 5,000 - 10,000 hours seems to be around when many people start needing work. Some engines go a lot longer.

I think most owners aren't going to see a rebuild ever unless the tractor is getting commercial or ag use. It is expensive if needed though. Good machine shops can use techniques that may bring worn parts back to spec, but for shorter service lives, than new parts. That can be an alternative to very expensive dealer parts but machining isn't cheap either.

Art and others probably know what comes through their shops and their comments would be more specific than my impressions.






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 12-09-2002, 08:59 Post: 45920
Art White



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 Engine hours before rebuild

Depending on the type of use I'll put the minumum life at 3000 hours for that unit which is on the average 30 years of home owner use. Tom, one of the differences ifn the quality of a rebuild is what specifications you use. Chances are unless you have the right books as well as all the coresponding updates it is hard to get a good job out of anything other than a dealer. We rebuild to factory spec's. Some times we have to get another head because the one we are working with has been milled to much. Or the flywheel has been turned to many times and is not thick enough or it has been turned wrong because of procedures used for turning. We have found that there are three basic ways to rebuild, kind of like the white, black , grey thing. Definitly wrong, maybe it will live, and the right way which is the only way we can afford to do it and put our name on it.






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 12-10-2002, 06:08 Post: 45953
TomG

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 Engine hours before rebuild

Art: I couldn't agree more. Inexpensive generally equals shorter service life and a faster return to maintenance problems.

I did go for an independent shop rebuild on my Ford 1/2-ton for around 2000 $CDN and a remanufactured engine from Ford was $3500 or so. I expect to get 75 - 100,000 km from the engine rather than 200,000 from a factory engine. At the time the body was seriously rusting away and I figured that the cheap rebuild was consistent with how long I expected to keep the truck. Since than I spent about as much as the purchase price redoing the body. Maybe I'll eventually regret not getting a factory engine--especially if new trucks don't return to actually being the 'tough heartland' things they're advertised as.

I think the seriously cheapy techniques used back when labour was very cheap compared to parts are long gone. Mechanics used to do things like knurl piston skirts and hand fit them to tolerances or ream valve guides and knurl the stems rather than buying new valves and guides. Valves with over-sized stems for use when reaming guides back to over-sized rounds may not even be available for many engines. Long gone are such techniques and good thing too because these patch ups didn't last very long.






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 06-15-2010, 12:48 Post: 171556
cbauer



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 Engine hours before rebuild

I wouldn't count on the above replies with New Holland. I have a TC29D and had to have the head remachined at 560 hours. The machine is now back in the shop at 680 hours and has a motor that has scratches in the block from a stuck ring. This has been $6000 dollars of repairs in less than 700 hours and no more than 120 hours since the last time it was at the dealer and new holland wont cover a thing. These motors on the boomers are not rebuildable, since you cannot bore out the block and use oversized pistons because they dont make them. Basically a throw away part at a cost of 2000 dollars just for the block. Stay clear of these blue machines and go green.






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 06-15-2010, 13:40 Post: 171558
auerbach



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 Engine hours before rebuild

Art, a bit off topic, but I've not heard of a flywheel needing turning. Like a brake rotor? Why would a flywheel ever need that?






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 06-15-2010, 21:18 Post: 171568
earthwrks

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 Engine hours before rebuild

Auer just like a rotor, a flywheel sometimes needs to be trued and the surface ground for optimal clutch performance. Rust, warpage, etc. have to be resolved. FWIW, hydros that are clutchless (not all are such as mine) don't have a clutch drive face---they are a hollowed out or dish-shaped flywheel.

Two types of hydro flywheels I know of have either a thin sheetmetal flex plate bolted to the outer perimeter of the flywheel with a splined center coupling the hydro pump slides into. An aside note, the flexplate is rubber-grommet isolated to reduce engine/and competing pump vibrations.

OR

The flywheel has gear teeth cut into the inside surface of flywheel wall. The hydro pump(s) has a gear on it driven by the flywheel. NH skid steers used straight-cut (versus helical) gears which are very noisey--Case on the other hand uses helical-cut and is very quiet.

And I couldn't disagree more about NH engines which for the compacts are made by Shibaura. Mine has 800 flawless hours on it. And those are abusive, demanding commerically-used hours.






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 06-16-2010, 08:37 Post: 171578
Art White



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 Engine hours before rebuild

Quote:
Originally Posted by auerbach | view 171558
Art, a bit off topic, but I've not heard of a flywheel needing turning. Like a brake rotor? Why would a flywheel ever need that?



Many of the clutch discs today in tractors are not the typical car type plates. They use metal in the pads and they can take the metal off a flywheel. Some flywheels between the wear and truing will only live through three clutch jobs before being worn to thin. Step flywheels are turned wrong by many shops as there are set spec's for the difference between the bolt area or flange where the pressure plate bolts on and face where the clutch disc does it's job. This will cut the life of the disc considerably if not kept to proper dimensions.






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 06-16-2010, 08:40 Post: 171579
Art White



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 Engine hours before rebuild

Quote:
Originally Posted by cbauer | view 171556
I wouldn't count on the above replies with New Holland.I have a TC29D and had to have the head remachined at 560 hours.The machine is now back in the shop at 680 hours and has a motor that has scratches in the block from a stuck ring.This has been $6000 dollars of repairs in less than 700 hours and no more than 120 hours since the last time it was at the dealer and new holland wont cover a thing.These motors on the boomers are not rebuildable, since you cannot bore out the block and use oversized pistons because they dont make them.Basically a throw away part at a cost of 2000 dollars just for the block.Stay clear of these blue machines and go green.



Parent bore blocks can be sleeved!!!!!! They do have to removed and taken to a machine shop but it is common to bore them out add a liner and put them back into service with standard bore dimensions.






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 06-16-2010, 09:37 Post: 171584
hardwood

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 Engine hours before rebuild

I used to have a full compliment of machine shop equipment, mills, engine lathes, etc, but have sold all but the lathe and some basic stuff now.
I never was near as good as some guys I knew in the trade, but it was pretty rare that they couldn't rebuild a "Throw away" engine, or most anything for that matter.
There are lots of things that changed in the metals they use now that I never got into but I'll bet the guys that are good at it have kept up.






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