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Tractor Talk Discussion Forum

water in hydraulic oil system

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weedsabate

02-08-2004 17:31:36




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I have a JD300 with loader and backhoe, cover blew off, boots are rotten on shift levers, rained in a bunch. I have been pulling drain plug and trying to separate water. Not enough. oil is milky. My thoughts were to drain sys. and put in 10 gal. red diesel, run at fast idle and exercise all cylinders, drain and do it again, and bleed brakes. My thinking is that it easier to get water to separate from diesel than oil. Is there any additive to hasten the removal of water>

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Bus Driver

02-09-2004 04:42:51




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 Re: water in hydraulic oil system in reply to weedsabate, 02-08-2004 17:31:36  
If it really is necessary to salvage the oil that is drained from the machine, place it in a clean bucket, cover to keep dust out and let it sit for several days in a place where it will be well below freezing. The water will separate to the bottom and when the water is frozen, the oil can be poured off.



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John

02-10-2004 00:01:22




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 Re: Re: water in hydraulic oil system in reply to Bus Driver, 02-09-2004 04:42:51  
Tell me..... What do I tell my wife when she sees a bucket of oil in her kitchen freezer.
Cause that is the only place around here that is below freezing for more than a hour or two :<)



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david val

02-09-2004 01:06:59




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 Re: water in hydraulic oil system in reply to weedsabate, 02-08-2004 17:31:36  
you should flush the system a few times until flushing oil comes clean, then install new oil and filter(s).
you cold use for flushing any light whight engine or hydraulic oil (the cheapest you can find). if you have a remote use it to help draining oil remains in the system by connecting an open hose to the remote after oil was drained from the bottom, placing the hose in a bucket and operating the scv until oil stops flowing out of the hose. immediately turn engine off. do it on every flushing cycle. replace the filter(s) for the first flush and then again for the new oil fill. when flushing operate all hydraulcs incl. steering rockshaft, all loader funcions and reverser. also drive the tractor and bleed the brakes to replace the brake oil.
water in the oil in this tractor may be deadly for brake linings. check suction screen frequently for signs of brake material after the tractor is put to work. have the brake disks replaced at the first dign of disintergating.
david

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Jerry/MT

02-08-2004 21:25:00




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 Re: water in hydraulic oil system in reply to weedsabate, 02-08-2004 17:31:36  
Don't run the sytem with diesel fuel in it! If you want to flush it with diesel, just put it in and drain it out. Or put clean motor oil in and cycle it. I like the advice the other guys gave you below.



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paul

02-09-2004 08:19:19




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 Re: Re: water in hydraulic oil system in reply to Jerry/MT, 02-08-2004 21:25:00  
I've heard of people 'running the tractor' without operating anything with diesel in the tranny, just to splash it around a bit & flush off the walls. Or using some ATF. These will pull some crud off & disolve it. Only a couple of minutes, and not disurb the hyd system?

I don't know, & I sure wouldn't want to get carried away....

--->Paul



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Bob

02-09-2004 09:42:33




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 Re: Re: Re: water in hydraulic oil system in reply to paul, 02-09-2004 08:19:19  
paul,

I believe the transmission on this unit is also the hydraulic reservoir, and that this is a closed-center system, which means that as soon as the engine is started, the pump would be trying to build up 2250 PSI system pressure with diesel fuel. Not good.



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paul

02-09-2004 12:03:39




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 Re: Re: Re: Re: water in hydraulic oil system in reply to Bob, 02-09-2004 09:42:33  
Yup - JD. I need to read closer. Closed centers are much fussier. You are right.

An open center would not build the damaging pressure. And still not sure I'd do it on that, just what I've read... ;)

--->Paul



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JMS/MN

02-08-2004 20:20:14




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 Re: water in hydraulic oil system in reply to weedsabate, 02-08-2004 17:31:36  
Drain the system and refill with hydraulic oil. If you operate it with diesel fuel in it, you will leave fuel in the cylinders. If necessary, do it again.



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Wayne

02-08-2004 20:06:11




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 Re: water in hydraulic oil system in reply to weedsabate, 02-08-2004 17:31:36  
I have to agree with Bob, using diesel fuel in the hydraulic system isn't a good thing to do. I believe you'd be doing more damage to the system if you did this than the water/oil mix would ever do. The best thing to do is gonna be drain everything and fill with fresh oil, and operate it some. This will let what was left of the old stuff mix in with the new so when you drain it again you'll get most of the mix out. It may take several times of draining and filling the system to get it cleaned out, but do it til the milkiness is gone and your left with good oil and you should be ok. Just my .02

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Bob

02-08-2004 17:58:05




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 Re: water in hydraulic oil system in reply to weedsabate, 02-08-2004 17:31:36  
I think it would be a bad mistake to operate the system with diesel fuel. I would drain it, install new hydraulic oil, (maybe some generic stuff just for flushing), run it and drain it and repeat if necessary. Then, as the final fill, use factory spec. hydraulic fluid. This will cost a little money, but is certainly cheap compared to any breakdown of the hydraulic sytem.

If there are any traces of water left, it will probably be "cooked" out of the oil once hot weather rolls around, and the system is worked hard on a hot day.

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Ol Chief

02-09-2004 20:09:45




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 Re: Re: water in hydraulic oil system in reply to Bob, 02-08-2004 17:58:05  
Funny that I should read this proposal to use a diesel flush.Just this afternoon a local carpenter told me of a jobsite accident in which a fellow was using a hyd. jack which was filled with diesel fuel.I pressume the there was also some air in the jack.It seems that when the load came on the jack a diesel effect occured and the jack exploded.I have no first hand knowledge of this accident but I have seen the results of someone oiling attaching nipple on an oxygen pressure regulator. Bang. Go figure.

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