I have a 490 E John Deere which is built by Hitachi, it has around 5200 Hrs. on it. I recently rebuilt the main hydraulic pump with the following new parts - cylinder, pistons, driveshaft, spring, servo piston, and valve plate.
After getting it together and the air out of the lines evrything was working as it should. I went to work it for the 1st time and after 10 minutes the hydraulics would just shut off. I would shut the machine off and restart it and have hydraulics for just a few seconds then stop working.
The engine does not pull down or change the way it is running. It seems to be more of an electrical problem.
When I re-assembled the head I was careful to make sure the valve plate pin was in the angle sensor arm. Is it possible I didnt get it in properly? Or did this need adjusted after rebuilding the pump? I am at a loss and hoping someone on here has an answer. Thanks in advance for any help.
After getting it together and the air out of the lines evrything was working as it should. I went to work it for the 1st time and after 10 minutes the hydraulics would just shut off. I would shut the machine off and restart it and have hydraulics for just a few seconds then stop working.
The engine does not pull down or change the way it is running. It seems to be more of an electrical problem.
When I re-assembled the head I was careful to make sure the valve plate pin was in the angle sensor arm. Is it possible I didnt get it in properly? Or did this need adjusted after rebuilding the pump? I am at a loss and hoping someone on here has an answer. Thanks in advance for any help.