I have no lift on my boom cylinders on the backhoe, I bottom out the left stabilizer and the boom will lift. WIthout the left stabilizer bottomed out and try to raise the boom, the boom will lower down. I replaced all the secondary and primary resolvers orings a year ago, I haven't used the machine since I did the orings but everything worked fine. I replaced the primary resolvers in the left stabilizer and the boom valve and still no fix. What else could I be missing here. no other functions appear to be giving any issues. Haven't put a pressure gauge on it working on getting one Serial number 5pc05965
You are right about the resolver valve orings even if they just get hard and dried out they will not work I have had to replace the ones on my 416 a lot,maybe you have a hose that has separated on the inside and it is blocking the fluid