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720 tractor

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Tom

06-25-2003 13:48:23




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Thanks for all your input on this tractor. I went ahead and bought it. She is an electric start with adjustable wide front, three point hitch and fenders. The paint is faded and looks original. The tach shows 1800 hours.

I put a seven foot rotary cutter on her over the weekend and it worked out very well. The engine ran cool on a 90 degree afternoon but I noticed some white smoke, like blow by, coming from the area of the starter. Their was no smell of burning wires and I believe that the smoke is blowing past a seal somewhere. It wasn't excessive, just noticable.

The only leak I can find is where the fan shaft joins to the governor housing. I removed the three bolts holding it together with the intention of using permatex to seal the joint, but I couldn't get the pieces seperated far enough to work in there. Do I need to remove the water pump?

Finally, the PTO brake barely holds the mower stationary. This seemed to improve with more use.

So far I've got $6,500 in the tractor. Do you think that I got screwed?

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Gentle Ben

06-26-2003 08:17:28




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 Re: 720 tractor in reply to Tom, 06-25-2003 13:48:23  
Don't know if you got screwed, but at that price, you're at least into heavy foreplay.



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Another Tom

06-25-2003 19:56:18




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 Re: 720 tractor in reply to Tom, 06-25-2003 13:48:23  
Congratulations on your new tractor. Recommend the following: 1. Get 3 real JD Manuals, Operator, Parts, Repair. 2. Give tractor a good pressure washing, first using engine cleaner in the spray cans (you will need at least 12 cans), let it set and then pressure wash. 3. Change all fluids: coolant (50/50, engine oil/filter, hydrolics, trans, diff, final drives (everything it has) Use high quality lubricants. 4. Change fuel filters. 5. Clean and service air cleaner. Consider all the above as part of your initial cost of the tractor.

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JD70Jim

06-25-2003 17:44:37




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 Re: 720 tractor in reply to Tom, 06-25-2003 13:48:23  
Personally, I think that in order to have a GOOD, fully functioning, mechanically good 720 or 730 you will need to spend about $7500 by the time all is said and done. Buy one for $6500, and find that a set of decals and paint are the ONLY things it will need, and you've done ok. The people who think that by purchasing one in the $3200 range, they've saved a pile of money, are fooling themselves. Unless you can literally STEAL one, you will have more money, eventually, in a cheap tractor than one which you purchased after someone else bought all of the replacement parts and installed them.

it may also be, that if cosmetic repair work is not contemplated, and all that the tractor needs to do is function, you can get by with a lot less money that the $6500-7500 that RESTORED tractors command. If you don't need to get the perfect sheetmetal, don't have to have oem lights, and can get along with 3ph components that don't pass muster, but nevertheless work fine---so be it.

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Bob

06-25-2003 15:19:05




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 Re: 720 tractor in reply to Tom, 06-25-2003 13:48:23  
Smoke you refer to from the area of the starting motor is engine blow-by coming out of the crankcase breather. A reasonable amount is normal.



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Lee 720

10-20-2006 11:00:21




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 Re: Re: 720 tractor in reply to Bob, 06-25-2003 15:19:05  
You spoke of blow by coming out near the starting engine. Does the big engine vent thru the pony? Does it vent out the breather of the pony? I have a 720 D that has blow by on one side something fierce. It was stuck when I got it but it freed up. It had blown a head gasket, that is why it was parked. That one cyl was pretty bad but cleaned up ok, or so I thought. Now it runs but blow by comes out anywhere it can get away. It will fill the pony up with the big engine oil. If I idle it with the big engine filler cap off, it will blow so bad that oil will start spurting out. Guess I should have taken it the rest of the way down while I was replacing the head gasket. I know I know, but I am not normally an idiot.....

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