ROCKWELL-C60
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Mine does same thing after lifting a heavy load following with great interest
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.Would be cool to do electric valves for control, thought about doing it that before I bought the NOS valve body, paid $1600 for that . Thanks for info , appreciate it .
Good info.I do the same rope trick lol.
Would be expensive, but have thought on many occasions to convert it to electronic valves so I could use a remote. Gets old climbing on and off constantly when loading a trailer or pulling a motor.
There are no counterbalancing valves on the wreckers. The newer ones yes, but m936 and older no. Blow a hose and they drop like a rock. And you can lower them without power as Mullaney said.
Now my hyrail boom truck has them, and I blew a line on it once with it up in the air while on the track... that was a fun walk back to town to have a hose made, when without one I could have still lowered it and driven the truck down the rails. Instead I would have just recreated the scene from Back to the Future when I got to a power line.
But they do have a benefit as the boom and load didn't come crashing to the ground.
It's called a plunger valve NSN 2590011311940View attachment 832242
Sorry for screwed up picture, I tried fixing . Where it says Boom Lift Cylinders, talks about check valve that holds it from lowering. There is a check valve in the hose of each cylinder on the bottom port . I thought they just cushioned the hydraulic pressure from spikes. Any idea on the check valves???
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