Hello everyone. this is my first post & I'm sure I'll get some great info here. I am working on a JD 410 & the issues started with the steering not working as smoothly as it used to. At this point if you start to steer in either direction & let go of the steering wheel it will continue to full lock on it's own. Secondly as I was using the hoe last time it started to feel sluggish & weak so I stowed it & when I attempted to raise the bucket to drive it into the shop I had nothing. It took 5 minutes to get it off the ground enough to drive without dragging. We did lose the big hose from the pump to the cooler early this spring & I don't believe the correct fluid was put back in to top it off. Would a standard hydraulic fluid (AW46) cause any of these issues? Finally, if I want to drain all of the fluid out of this unit to put all new & correct fluid back in is there a standard procedure other than loosening the lines on all cylinders? Thank you in advance for any help you can provide. Yes, this is an old military owned piece......
Welcome to HEF Shooter ! Is this the backhoe you have?
Welcome to HEF, shooterlynxmc !
Thank you & Yes sir, although it isn't that pretty anymore. I drained the hydraulic fluid from the trans before lunch. Looks like I have to move the hyd filter & it's housing + the rt rear tire to get at the fitting hiding the screen.
Thank you sir.
Good place to start. Might as well change the hydraulic and transmission filters too. I would check the destroke solenoid on the side of the main hydraulic pump. Make sure it is only getting voltage when cranking. No voltage when running. I would remove it also to see if the O-rings are OK and to hotwire it in the bench to make sure the spool inside moves.
Thank you for that advice sir. Back in the shop this morning and I’ll be digging in further. Where I work if the cost to repair exceeds their estimate of the value of the vehicle/ piece of equipment, it will just be turned in & go sit in a turn in lot until disposal. I’m trying to avoid that.