Recent content by cha9969

I have been trouble shooting hydraulic control valve associated with 1987 L 555. It looks like I'm going to have to replace control valve which was manufactured by Duke who has been purchased by QCC. Does anyone know of alternate source for this valve other than New Holland? Price tag is $1600...

When I removed the control valve it was disassembled and inspected. No apparent damage to spools in the control valve or control valve body. The control valve was placed on hydraulic test stand with bucket cylinder attached and operated at 1500 psi. On the test stand the bucket cylinder worked...

I have put a tee with pressure gauge at the bucket cylinder on each port. I have the same pressure on each side of the cylinder. If I remove one line from the cylinder and plug it while running the cylinder discharge side into a bucket, I can move the cylinder in or out depending on the line. I...

Thanks For the reply: The problem is that the bucket will not tilt in either direction. In trouble shooting process, I have also disconnected the linkage to the control valve and move the spool control valves by hand and bucket will still did not move. I have checked that hoses to bucket...

Thanks for the replies. To date the trouble shooting sequence is as follows. I pulled the control valve and cylinder and took it to hydraulic shop. The cylinder was attached to control valve and operated at 1500 PSI. All operations of valve and cylinder where verified to operate properly. All...

I have a New Holland L 555 (serial # 713285, think 1987 model) that has bucket tilt problem, this model only has one cylinder for the bucket. I have pulled control valve and had it checked at hydraulic shop and it checked OK. I put a pressure gauge in the bucket cylinder hose line on each side...