Deere recommends CJ4 15W40, but I can't see any reason that 10W30 wont work.Used John Deere plus 50 engine hydraulic oil. Changed and cleaned the suction screen and changed hydraulic filter. Disconnected the line from the pump to the tank return and suction filter and found reverse flow. Not supposed to have happened according to JD service support. They had determined flow would be traveling to the suction filter and hyd filter and returning to the pump via bottom outlet back to the pump. Made since to me but something is obviously misleading. They thought by starting the unit with line disconnected, I could tell if oil had air at or after the pump. They are going to look into there information to determine the directional flow and get back with me. I know I am missing something simple here.
Yes. This is correct. Another side topic, the pneumatic accumulators serve what purpose and do they need to be serviced or recharged? I ended up taking off the main feed #2 from the bottom of the reservoir to the pump and found the bottom side of that line wet with oil. It does have a few scuff marks and the flat oring on the clamped pump end appears to be very dry and quite compressed. I will make up a new line tomorrow. Whether or not this is the issue I am not sure. The other lines that I have replaced, all had very small pinhole leaks. Crossing my fingers. Please offer suggestions.
This I found today to be true. The tech at the JD service department was misinformed. I did take the main suction line from bottom of resevoir to pump feed off and found it to dry cracks throughout it's length. Will replace with new today to see if this will fix this issue. Thank you for the continued support !!
. Replaced what appeared to be weathered and cracked line from resevoir to pump inlet #2 pictured above. What next ? Pump pressure checks ?
This ? Is air in the oil. This is where all my foam is coming from. Wanted to send video but was unable.
