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hydraulic control valve
Posted: Sun Feb 03, 2013 8:38 pm
by wagonmaster
My hydraulics leak down on both of my 154's. Anyone had any luck rebuilding them ?
Re: hydraulic control valve
Posted: Sun Feb 03, 2013 9:03 pm
by Eugene
I have rebuilt hydraulic control valves. You need to remove the valve, disassemble, inspect to determine bore, spool valve and o-ring condition. Problem is probably a damaged o-ring, but one never knows until the valve is inspected.
Just checked the service manual. Tractor serial number U018709 and below has a circuit relief valve. Might be the problem.
Service manual contains instructions for repairing the control valve.
Re: hydraulic control valve
Posted: Mon Feb 04, 2013 7:33 pm
by BigBill
Are you sure there is no water in your hydraulic system?
Re: hydraulic control valve
Posted: Wed Feb 06, 2013 4:33 am
by SONNY
The mowers on mine go down after a week or so,but I think the lift cylinder has worn piston in them! thanks; sonny
Re: hydraulic control valve
Posted: Wed Feb 06, 2013 9:02 am
by Eugene
The hydraulic system is single action. If you are not losing oil externally, then the leak down is occurring at/in the hydraulic control valve.
Re: hydraulic control valve
Posted: Sun Feb 10, 2013 7:53 pm
by wagonmaster
No water in the system. No external leaks. One tractor leaks down in about 5 min. the other tractor in 5 seconds.