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John (UK)
10-12-2006 05:16:16
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Re: TE 20 Lift Problem WARNING in reply to DennisPinOhio, 10-08-2006 14:50:09
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Hi Dennis, The length of time that the 15W-30 oil has been in your system, it is unlikely that even supposing that it has an excessive amount of sludge in the bottom that it will have loosened in sufficiently. The Multi-grade oil contains very little detergent, it is not like the oil we use in the Diesel engine which has a much greater amount and I would definitely not use that. Even the GL1 oil now contains some detergent, it is not completely detergent free as it was originally. I don't think you can have run the Hydraulics long enough for the detergent in the 15W-30 to have had much effect, if there is anything floating around it will be from disturbing the sludge The chances of it jamming the Relief Valve are very remote because of the High Pressure involved, if you have cleaned the Reservoir out as you say then I can't really see it causing a problem. It may jam the Control Valve as there is no pressure on the suction end and if there was something floating around in the reservoir that is where it would be. This procedure has been done many times and we have never been told of any problems after cleaning. It is highly unlikely that the oil that is causing the problem and I think you may cause an unnecessary "panic" by posting a warning like that until we know just what is actually causing it. You say that the Kerosene you used for washing it out did not come out very dirty, so again it seems unlikely that there is enough sludge in there to cause a problem. We do get them inches deep in sludge and they still work, it is just the chance that some of this may break off the Reservoir walls and get sucked into the Pump and make the Control Valve stick. Did you put your hand into the Reservoir and physically feel what was in the bottom, a good indication of what the state of the Reservoir is in is to see how much sludge is in the Drain Plug. Any sludge in the Transmission is almost impossible to clean out until such a time that it is overhauled and the Cover removed, in the rear wall of the Transmission there are some holes that allows the oil to pass between the Transmission and the Hydraulic Reservoir, but due to the size of them this also restricts the speed at which it can flow, they are also quite a way above the bottom of the Transmission so any sludge on the Transmission is more likely to stay in there than flow through the restrictor holes, this is why the oil takes so long to level out when you refill it, another reason for these is to prevent oil surge when working on hillsides, without these you would finish up with most of the oil in the Transmission section and leaking through the Main Drive Shaft oil seal into the Clutch Housing. So with the Transmission sludge trapped in there and you have said you cleaned out the Reservoir and Rear Axle there can be very little sludge left in there. Have you checked the Control Valve that it is moving freely in and out of it's Bush, unless it does this it can't control the Pressure. Regards...John
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