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4600 Oil Leak

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Brian in MA

12-03-2007 07:31:35




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I noticed this weekend when I had the 4600 on a trailer that I have a leak out of the cotter pin in the bottom of the tranny. It's engine oil, not tranny fluid. Is there any simple possibility before I jump to the assumption that I have a bad rear main seal? The tractor only has 1,000 hours on it, but before last fall it sat for 10+/- years. I have put almost 100 hours on it since May, but it never leaked before Saturday. Any other thoughts? Are these seals easy to R&R once I have the tractor split and the clutch off? Not looking for another project, but it needs to be fixed.

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wagdriver

12-04-2007 05:55:23




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 Re: 4600 Oil Leak in reply to Brian in MA, 12-03-2007 07:31:35  
Plastic alingment tools can be had cheap from YT!



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mowr

12-03-2007 08:46:45




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 Re: 4600 Oil Leak in reply to Brian in MA, 12-03-2007 07:31:35  
If it's a diesel and by any chance someone put "for gasoline engines" oil in it, try changing it back to oil designed for diesel engines. I know a farmer who had good success with this on his. Your assumption is correct that as long as the weep hole is not plugged, the oil is not at all likely to get on the clutch disc(s).



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RodInNS

12-03-2007 13:55:13




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 Re: 4600 Oil Leak in reply to mowr, 12-03-2007 08:46:45  
While the wrong oil might cause that to happen it's been my observation that most of these engines at least weep at the rear seal. From my observations of those that don't, I don't think one of them has done a proper day's work. They spend their time putzing around on some pretty soft jobs. The ones that leak are always hard workers. I've seen that with mine and a good deal more.
It's normal for them to be tight for a few years or perhaps a thousand hours, but after that they gradually take to weeping and then leaking.

Rod

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Brian in MA

12-03-2007 17:01:52




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 Re: 4600 Oil Leak in reply to RodInNS, 12-03-2007 13:55:13  
I've never noticed a drop from my 5600 and that tractor has been rode hard and put up wet for sure with 5000 hours. Maybe I haven't looked close enough. If a little leak isn't a problem, I'm ok with it. My motto is that with a little oil, it won't rust adn the bolts should come out easier when I need to take it apart.

Thanks for the input.



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RodInNS

12-03-2007 19:05:03




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 Re: 4600 Oil Leak in reply to Brian in MA, 12-03-2007 17:01:52  
Most I see are all wet around the oil pan/adapter plate area and fall into the categories I already mentioned. I spose there's always exceptions, but I can't say that I've seen too many of them...

Rod



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Brian in MA

12-03-2007 09:51:56




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 Re: 4600 Oil Leak in reply to mowr, 12-03-2007 08:46:45  
Rotella 15W40 is what it has had as long as I have had it. I plan to change it this weekend to see if clean oil is any different. Thanks for the suggestion.



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RodInNS

12-03-2007 08:03:24




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 Re: 4600 Oil Leak in reply to Brian in MA, 12-03-2007 07:31:35  
Rear main seal leaks are common on all of Ford's Basildon engines that I've seen. Most are weepers but after some years of lugging they turn to leakers. If it's just a weeper and you don't notice the oil level dropping then I wouldn't worry about it. If it's actually got a good drip to it then it's time to change it. That requires a split and flywheel removal. That shouldn't be a big job on a 4600 without a loader or cab... but if you have either one then it gets more complicated and time consuming. For what it's worth, I've never split one of those tractors simply for a rear seal leak. It's always been for clutch or transmission work and not related to the seal at all. I just change the seal when I'm in there...
Before I got too excited about this I'd check the engine oil and make sure that it's not overfull too...

Rod

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Brian in MA

12-03-2007 08:12:47




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 Re: 4600 Oil Leak in reply to RodInNS, 12-03-2007 08:03:24  
It's not overfull, in fact it's at the add mark on the dipstick. That brings up my next question, it's just dripping, so is there any concern with letting it ride? I assume that since the seal is on the engine side of the flywheel, and leakage sould be slung outward before it gets to the clutch disk, it shouldn't impact operation or saturate the clutch? To keep an eye on the oil level and run it another season shouldn't hurt it? It just appeared, but this is also the off season for the tractor, so if it needs to be done, the next few months would be the best time. No cab or loader, but I still hate to split a tractor until it is necessary. Will I need a clutch alignment tool to put this back together or are these pretty simple to align? Maybe I'll re-assess the leak this weekend and decide. Thanks as always Rod for your input.

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RodInNS

12-03-2007 13:48:54




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 Re: 4600 Oil Leak in reply to Brian in MA, 12-03-2007 08:12:47  
I'd leave it alone if it was mine. I've had a couple now with pretty good leaks and never had any clutch trouble. I've got a couple more that are still leaking. I just make a practice of changing the seal when I have the tractor split anyway. I think that so long as you keep the drain hole clear you won't have any trouble.

If you do get to changing the seal you can likely get by without a fancy alignment tool. The tool is better, but I've made them from sockets and extension bars, electrical tape, wooden dowels and even the transmission input shaft if I happen to have that out for some reason... If all else fails I've even eyeballed the disc on the wear marks on the flywheel. I've yet to but a tool to align a clutch...

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