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rbargeron · 10-27-2007, 12:59 PM

Could be air in the sytem - its good to cycle all the cylinders thru full travel after a re-attachment. If that's no help, with the bh bucket lifted a foot or so off the ground and all valves centered, and the machine shut off, disconnect the hydraulic couplers to the backhoe, blocking flow in or out of the control valve. If the boom continues to drop, it would indicate the leak-by is at the piston. If it drops a little but stops, that points to the valve.
Be careful since this would pressurize the exhaust hose - to reconnect the coupler, the pressure would need to be bled off by operating other valves to allow the boom to lower to the ground. Good luck. Dick B.

10-27-2007, 12:59 PM	#2 (permalink)
rbargeron Veteran Member Join Date: May 2000 Location: MA Posts: 1,610	Re: Backhoe boom drooping Could be air in the sytem - its good to cycle all the cylinders thru full travel after a re-attachment. If that's no help, with the bh bucket lifted a foot or so off the ground and all valves centered, and the machine shut off, disconnect the hydraulic couplers to the backhoe, blocking flow in or out of the control valve. If the boom continues to drop, it would indicate the leak-by is at the piston. If it drops a little but stops, that points to the valve. Be careful since this would pressurize the exhaust hose - to reconnect the coupler, the pressure would need to be bled off by operating other valves to allow the boom to lower to the ground. Good luck. Dick B.