hydraulic control valve

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wagonmaster
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Zip Code: 14830
Tractors Owned: 108
147
1969 154
1971 154
Location: Corning NY

hydraulic control valve

Postby wagonmaster » Sun Feb 03, 2013 8:38 pm

My hydraulics leak down on both of my 154's. Anyone had any luck rebuilding them ?

Eugene
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Re: hydraulic control valve

Postby Eugene » Sun Feb 03, 2013 9:03 pm

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.
I have an excuse. CRS.

BigBill
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Re: hydraulic control valve

Postby BigBill » Mon Feb 04, 2013 7:33 pm

Are you sure there is no water in your hydraulic system?
I'm technically misunderstood at times i guess its been this way my whole life so why should it change now.

SONNY
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Re: hydraulic control valve

Postby SONNY » Wed Feb 06, 2013 4:33 am

The mowers on mine go down after a week or so,but I think the lift cylinder has worn piston in them! thanks; sonny

Eugene
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Posts: 15056
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Re: hydraulic control valve

Postby Eugene » Wed Feb 06, 2013 9:02 am

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.
I have an excuse. CRS.

wagonmaster
Posts: 14
Joined: Tue May 01, 2012 10:22 pm
Zip Code: 14830
Tractors Owned: 108
147
1969 154
1971 154
Location: Corning NY

Re: hydraulic control valve

Postby wagonmaster » Sun Feb 10, 2013 7:53 pm

No water in the system. No external leaks. One tractor leaks down in about 5 min. the other tractor in 5 seconds.


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