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John Deere Tractors Discussion Forum
Show Parts for Model:

Re: 4240 hydralic issue?

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Tim S

11-11-2012 09:22:54
75.49.2.215



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You can pick up a good 5,000psi gauge for about $35 screw a fitting on it and you have one..dealer service call plus an hour or so $$$$,,if you were closer you could borrow mine I have 4 or 5 of them ,,loan out to the neighbors a lot...




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travz500

11-11-2012 09:26:04
76.7.23.114



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 Re: 4240 hydralic issue? in reply to Tim S, 11-11-2012 09:22:54  
well ok i may just do that then is there a certain kind of gauge? like something tractor supply or orchelins would have? then just hook it up to the remotes in back?
thanks guys will do this week and try it out was afraid i may have a hydralic pump going out or something



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DEEREMEYER1

11-11-2012 11:32:07
71.50.25.139



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 Re: 4240 hydralic issue? in reply to travz500, 11-11-2012 09:26:04  
Just a regular 2 1/4 inch or so pressure gauge will work fine. Spend a few extra bucks and get a good liquid-filled one and use bushings to thread it into a standard SCV hose tip. Of course the preferred way to check standby pressure is at the priority valve on the RH side of the tractor with a jumper hose and DR quick-connect. The pressure adjustment is at the hydraulic pump itself, so if you're plugged in at the side, you can watch the gauge while you adjust the stroke-control valve instead of needing a helper to watch the gauge at the rear. If you do plug into an SCV, while you're at it, you can check to see if any of your SCVs are leaking up or down. Plug the gauge in like normal with the lever in neutral. If there is pressure at the gauge, the pressure side of the valve is leaking. Stroke the lever to put pressure to the gauge and then return the lever to neutral and if the pressure drops off rapidly, you have a return leak. You'll have to repeat the procedure for both couplers in each SCV since there are two pressure valves and two return valves per SCV.

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