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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

TD8E Enigine Update and Questions

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Uncle

01-18-2007 15:29:18




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I talked to the guy on this TD8E and he said that there was a bearing behind the cam gear that went out and needs replaced. He said new bearings need installed but there is nothing wrong with the lower end.
Why would he pull the main caps off for a cam bearing? He wants $5k for the unit as is.
Brian




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cplatt1

01-18-2007 17:40:28




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 Re: TD8E Enigine Update and Questions in reply to Uncle, 01-18-2007 15:29:18  
Uncle: I own an International 125C tracked loader with the D239 engine. I just rebuilt the motor. $3000 at the machine shop, they straightened and balanced the crank, magnafluxed the block, replaced all bearings (.020 oversize on the crank) and did a complete head job with new valves, seats, and injectors. I purchased a rebuild kit from "Yesterdays" and reassembled the motor, so I"m very familiar with the D239.
The only way to get to the cam for removal is to remove the water pump and then the large front casting which the water pump attaches to. The cam is mounted to a bearing"d flange which is bolted to the block under this large casting.
If your looking at the engine from the front, the cam is located towards the upper left. Also you must remove the left side cover (under the exhaust manifold) so you can access the tappets/lifters that the cam interfaces with. This is after you remove the valve cover and loosen all the rockers. Also someone mentioned an oil balancer in the bottom of the engine. This really is a balancer for the crank. This balancer has two cast iron lobes that interface with a gear that in turn interfaces with a gear on the crank itself. Its really a decent engine (german design) used in both tractors and crawlers. I would recommend purchasing manuals from Jensels if you decide to buy. Its fairly straight forward with manuals in hand. One tricky area is timing the fuel pump. I can supply you with all the details. My motor runs great. CP

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DMont

01-18-2007 15:43:35




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 Re: TD8E Enigine Update and Questions in reply to Uncle, 01-18-2007 15:29:18  
I wish the tractor was in Texas. I would sure like to find on here. The TD8e had wet steering clutches, good transmission, turbo charged engine, 6 way blade and great balance. HOw is the undercarriage, a lot of money can be spent here. One way to get a quick idea of wear is look at the sprocket teeth as you approach the tractor. Are they sharpe--if so the pins and busings are badly worn. Do the pin bosses show scrubing? If they are scrubbed the roller flanges are rubbing and the rollers need replacing. Back to the engine---has he removed it and started disassembly? Be sure to get all the parts if it is apart. You can source engine parts at many tractor salvage yards. MOre info-----
Don

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Dandy Dave

01-21-2007 06:35:24




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 Re: TD8E Enigine Update and Questions in reply to DMont, 01-18-2007 15:43:35  
In these engines it is is necessary to line bore the cam bearings. New cam bearings are sold under size and this work must be done in a machine shop that is equiped for this operation. Also, The ag engine differs from the industrial engine. The DT239 ( Diesel, Turbocharged) used in industrial applications has some differences and is similer to the D239 combine engine. The D239 ag (Not turbocharged) engine has "lighter" parts installed in it. On easy way to tell one from the other is the size of the lifter cover. It is bigger on the DT239. Dave!

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