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Wayne
06-17-2004 21:08:22
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Re: Re: Re: Re: Detergent Motor Oil for hydraulic in reply to J. Schwiebert, 06-17-2004 18:06:44
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The main thing that was an issue here with the oil was the fact that Komatsu published a manual stating to use a 10w40 motor oil in the hydraulic system of a machine. However when I called Komatsu and asked about it they told me flat out that they didn't recommend using a detergent motor oil in their equipment and that the fact the manual called for it was basically a "translation" problem. Basically it worked out just like I said, if you can't trust the mfg to tell you what oil to use, then you have to make your own decisions, so what do you base them on, past experience or a "expert" opinion.....Since the first dealings with Komatsu I have talked to numerous people that have said a detergent oil will not actually hurt the system per se, and that there are many systems running a detergent oil. The thing is the systems running these these multigrade oils are usually plant based systems that run 24-7 so they stay hot. The problem with running it in a piece of equipment, I have always been told, is the fact that the equipment is usually out in the field, in an already moist environment, and is run and shutdown in a regular cycle so it is constantly getting the system hot and cold, hot and cold. Anybody that has been around equipment out in the field has seen how much water this can cause to accumulate inside a machine. Look at the fuel system and the amount of water that can accumulate in the tank for an example. The hydraulic system is no exception, its just not as likely to draw as much condensation as the fuel. Using a straight "hydraulic oil" with a water dispersive agent allows any water that does get into the system to drop out and hopefully stay in the hydraulic tank where it can be drained off if needed, instead of being carried around into the rest of the system where it will cause the same type of sludge you can find in a car engine. I hear them talking about the detergents being good to remove varnish from spools, etc etc, but in all the years Dad and I have been doing this kind of work neither of us has ever seen a system with varnish on anything unless the machine has either been on fire, or severely overheated in some other way. Like I said years of experience in the field, or an educated "expert" opinion, that's basically the two choices your faced with when you have to make a decision as to what oil to use..... ..Personally I always go with experience and have never had a machine come back with any kind of oil related problems.
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