John Deere 410g hydraulics weak when digging deep holes.

I have a 2003 John Deere 410g backhoe that has a hydraulic problem when digging deep holes or ditches. With out riggers down and extenda-hoe out it will lose hydraulic power. if I set the out riggers and bucket down then lift the machine off the ground with the hoe it will only lift a couple feet off the ground and lose power. It acts like it runs out of hydraulic fluid but it isn't. Also when I release the controls after trying to lift the machine higher it will lower a few inches. I was thinking there was some kind of valve inside the hydraulic pump that pops off once it is under so much pressure but I know it shouldn't act like this. Hoping to find some answers here. thanks.

backhoegene said:

if I set the out riggers and bucket down then lift the machine off the ground with the hoe it will only lift a couple feet off the ground and lose power.

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Welcome to HEF backhoegene! Are a new owner of this backhoe? Need a serial number. If your loader bucket is on the ground when trying to lift the machine with the backhoe, it may be normal to drop down. It is perceived to be low on power but actually the boom lower circuit reliefs on Deere backhoes are set at a lower pressure than the system pressure, so when you lift the machine (sometimes even with the front bucket off the ground) it will only lift so far then the pressure required to lift exceeds the relief setting so when you release the lever it settles back down until the relief closes.

As far as not having power with the extendahoe out that may also depend on what you are trying to do with it. I suggest getting someone to thoroughly check the Pump Load Sense pressure, System pressure, circuit relief pressures and Flow limiter adjustment on that machine to make sure it is set up correctly.

Have seen this when a control valve is operated & then the associated ram travels all the way, the operator 'thinks' he allowed the control valve to return to center but maybe the linkage is gummy and it holds the position which then causes the relief to open in the system.....meanwhile the operator perceives a doggy machine.

mg2361 said:

Welcome to HEF backhoegene! Are a new owner of this backhoe? Need a serial number. If your loader bucket is on the ground when trying to lift the machine with the backhoe, it may be normal to drop down. It is perceived to be low on power but actually the boom lower circuit reliefs on Deere backhoes are set at a lower pressure than the system pressure, so when you lift the machine (sometimes even with the front bucket off the ground) it will only lift so far then the pressure required to lift exceeds the relief setting so when you release the lever it settles back down until the relief closes.

As far as not having power with the extendahoe out that may also depend on what you are trying to do with it. I suggest getting someone to thoroughly check the Pump Load Sense pressure, System pressure, circuit relief pressures and Flow limiter adjustment on that machine to make sure it is set up correctly.

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Thank you for replying. Yes I am the new owner of this backhoe. It has been perfect so far except for this problem which may not be a problem at all now according to you. It is a 2003 JD 410g Backhoe serial number 918534. So, in addition to the boom not lowering while lifting the machine in certain positions the bucket will not lift the machine neither the outrigger when the boom is down in a deep hole. One other thing is if I am digging very deep with the extendahoe out and I put downward pressure on the bucket it will actually retract the extenda-hoe. Is this also something to do with the circuit reliefs? I have operated Cat backhoes quite a bit but never a deer so I'm not familiar with how they differ in this way. Also I will see about getting the backhoe looked at by a Deere shop in the future. I just don't want them to tear too far into my wallet if I can possible figure it out myself.
I was reading about older John Deere backhoes on this forum and they say it could be a clogged suction filter in the pump.... but I couldn't find if the newer ones have this. Can you confirm if my model has a suction pump filter? Thanks so much for the reply.

oceanobob said:

Have seen this when a control valve is operated & then the associated ram travels all the way, the operator 'thinks' he allowed the control valve to return to center but maybe the linkage is gummy and it holds the position which then causes the relief to open in the system.....meanwhile the operator perceives a doggy machine.

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Thank you for the reply. I don't think it is gummy linkage because it only does it when the boom is lowered past a certain position.

I think your losing your mechanical advantage . Example do a push up with hands under shoulder then do a push up with hands 5” then 10”out from shoulders.