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Boom creeping down when bucket loaded on case c28 excavator lifting no problem, but if i hold lever to try and put enough hydrolic to hold just to keep steady boom drops faster
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I would try putting lift hose on the down side and down hose on the lift side. If it lifts when you push the down control and does not go down when you use the lift control then it may be a spool problem. Always take care to control all forms of energy when removing hoses to prevent harm or *****. I'm not sure if the spool on your loader is pilot controlled or mechanical linkage?? If it is mechanical take a look at all linkage and make sure its moving correctly. If its. Pilot control then the issue may be there also. Good luck and be safe.
You need a new valve block assembly thats all inside the assembly is a restrictor valve to prevent this but on the old plant i worked on 40+ yrs ago it was allk mechanical and repairable but new stuff is predded together and not readly repairable like the old gear from my youth
Not sure would need to have a good look ,but i suspect a safety valve isnt closing properly causing thumping within the hydraulic system which is the vibration you can feel,shouldnt cost a lot to repair providing the faulty valve can be located so return to the dealer as they will have a good idea as yours isnt the first to go wrong iam sure
Like other hydraulic systems, there is probably a procedure for bleeding the lines after loss of most of the fluid.
You may still have air trapped in the system and once it works its way to the cylinder, the cylinder is working with air instead of fluid and the air compresses instead of doing work.
after the idler is pushed all the way back into the frame.try to put some wood blocks under the track to remove all the slack.use the bucket to push as much of the bottom section under the bottom rollers.use a heavy chain and pull up and over the top of the roller.when you get close you can use the drive to walk it the rest of the way.if it still doesnt go you may have to break the track at the master pin. this is usually marked with a small hole drilled in the end of the pin.heat and beat the pin out,break the track.pull track over top rollers and make ends meet on top of the srocket.use a chainfall to pull two halfs together and line them up.drive pin back in and your all set.
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