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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

JCB 3C MK II hydraulics problem

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PL

11-05-2005 08:19:21




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I have an old JCB 3C MII with one of a million problems..... ..The most important one right now drawback in digging power. I suspect this may be a lack of hydraulic oil as there is a whiney noise when I used the hydraulics, however I was wondering if maybe the hydraulic filter also needs replacing?

Does anyone have any experience

Thanks




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ajk

11-05-2005 09:29:48




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 Re: JCB in reply to PL, 11-05-2005 08:19:21  
The 3C has one hydraulic filter and one suction strainer,the suction strainer is located inside the hydraulic tank,you have to drain the hydraulic oil and remove the plate on the bottom of the hydraulic tank in front of the R/H side back wheel to get to it,it is a washable strainer and should it be blocked or restricted it would starve the pump of oil,the main filter should be changed every so often as all filters should,its located behind the door on the R/H side,the filter is inside the big cannister with a U bolt around it,that is a throw away type element,when you cleaned the strainer and fit a new filter and try to refill the oil you will find that the oil fills very very slowly that is because the oil is passing through the filter,if you are using clean oil you can speed the filling up by loosening the big nut facing you below the filler neck and remove the spring underneath,screw the bolt back in a few threads,this allows the bypass valve to move off its seat and the oil will flow straight into the tank,fill it up to the mark on the sight guage,do not start the engine without putting the spring back and tightening the nut,also put the filler plug back or the oil will flow out when the engine is started,if you still have no joy come back.
AJ

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PL

11-05-2005 09:40:00




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 Re: JCB in reply to ajk, 11-05-2005 09:29:48  
Thanks will try, believe your a bit of a legend with these machines...

thanks again

Paul



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