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John Deere Tractors Discussion Forum
Show Parts for Model:

JD 710b backhoe hydraulic issue

Author  [Modern View]
Stevessuperduty

11-08-2013 18:16:33
72.185.1.19



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i have a john deere 710b backhoe with no charge oil pressure to main pump at idle but ok flow at operating rpm. hydraulics all work fine if kept at a high rpm but as soon as you idle it down hydraulics begin chattering and the pump starves for oil. I have a manual but honestly it has my head spinning around trying to check 30 different check valve, relief valves...etc. Clean fluid, clean filters, clean pick up screen. Put gauges on charge oil port on pump and 0 at idle and 50-70 at higher rpms. any help would be greatly appreciated.

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Tx Jim

11-09-2013 04:53:24
69.35.160.187



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 Re: JD 710b backhoe hydraulic issue in reply to Stevessuperduty, 11-08-2013 18:16:33  
Welcome to the complex world of closed center hyd's. Have you performed the simple basic things such as changing hyd filters, cleaning trans screen and checked stand-by pressure? After that I would suggest checking for hot spots after operating for a period of time in hyd components with a laser thermometer.



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bowlerman

12-30-2013 22:40:48
68.37.48.212



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 Re: JD 710b backhoe hydraulic issue in reply to Tx Jim, 11-09-2013 04:53:24  
i just bought a 1983 jd 710b and seem to be having the same issue. it seems to be the transmission fluid and hydraulic fluid are the same and mine is low. i hope filling it up and changing filter fixes issue. what fixed your issue?

my pump below radiator make noise if not using hydraulics. at idle hydraulics move but no power, if i rev it up it has power?



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bowlerman

01-15-2014 18:48:14
69.142.46.194



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 Re: JD 710b backhoe hydraulic issue in reply to bowlerman, 12-30-2013 22:40:48  
i have drained the fluid in the transmission which is the hydraulic fluid also and have put a new hydraulic filter in. the pump is making less noise but still chattering. it chatters when running but no hydraulics are in use. when using hydraulics, the pump seems to be quieter or no chattering. at idle i have pressure but all parts of the backhoe just give up trying while the control is fully on? something weird is wrong. it can lift up the whole backhoe at idle when the arm if fully extended but trying to curl the bucket fully extended it gets half way and gives up while i have the control fully on but if i uncurl the bucket it has full power again. same thing with out riggers. has full power sometimes and loses it during stroke? can someone help me narrow this down?

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