I have a 690C excavator and I lost all control functions. Control valve is working fine and the pump has oil going through it. I was driving up an incline when I lost all functions. I'm thinking that it possibly got air introduced to the pump but everywhere I check there seems to be hydraulic oil in the hoses. Anything in particular that I should be looking for? Thanks
Can you be more specific please I assume you mean moving joysticks and there is no response at all.
Joysticks or pedals for travel. Neither work
Prior to this issue I had the hose that comes off of the accumulator blow a hole in it but I replaced it and ran the excavator for about a half hour digging stumps and everything worked fine.
You are clearing digging stumps first i would check cover under cab to make sure no limbs or roots have pushed bottom cover up possibly hitting pilot shut off valve lever or binding linkage.
I checked the valve and linkage and everything is operating the way it should
I am sending you a parts diagram may are may not be correct SR# but should be close. I would say you replaced hose 1, it could be possibly some foreign material even from new hose entered pressure reducing valve 12 or check valve 26 causing you problems.
Ok I will check into this. I do have oil coming out of hose 1 by the accumulator. After replacing that hose it did seem like there was a few times that it hesitated during operation but it was only a slight hesitation when I was turning the table.
The issue was in the pressure reducing valve. Thank you. Do you know where I can get a replacement filter for it? I seen the one in there is in rough condition
Filter kit AT105419 $44.20 from dear dealer shows available to order. You will also need an O-ring R29936 $4.36. The kit has filter, 2 springs and one O-ring.
Meant Deere dealer.
Ok sounds good. Thanks again
Sending you part number pages to go with diagram.