NAA hydraulics

Allen Rush · Aug 2, 2016

I have a Ford Golden Jubilee tractor. Recently I rebuilt the 3 point hydraulics. Tested after installation everything was working properly until the unit ceased to lift. Hydraulic pressure had tanked (was 12 - 1500 PSI) at plug on top of unit. A visual inspection revealed fluid leaking from safety/relief valve on piston lift cylinder. I replaced valve and now have no pressure on gauge. I want to know if I have the proper replacement part (see photos)? The shaft end of the new valve is beveled where the shaft the old one is concave. Does the check ball have to be removed to use new valve? Any information would be appreciated. Thanks

ZANE · Aug 2, 2016

Neither of these valves is for the NAA??? The new one is a new style for the N series tractors.

The old one I have never seen but the NAA valve does not have the spring exposed like the one you say is the old one????

The NAA relief valve has the spring enclosed and no spring on the end.

Zane

Den N Ms · Aug 2, 2016

The valve for a NAA shows a spring #20,bell#19 and a ball #18

souNdguy · Aug 3, 2016

Zane.. are you talking about the relief in the base of the sump?

ZANE · Aug 3, 2016

No the relief valve in an NAA is mounted to the ram cylinder housing and lies horizontally. Looks like the relief valve on a Hundred series.

Zane

Den N Ms · Aug 3, 2016

The one on the right(old) in his pic is the correct valve for a NAA as they are by there self part # NAA984F.The 600 had the change of the valve style with no spring on the end in C9NN925A Valve, Hydraulic Lift Unload, Start Year: 01-JAN-55

NAA hydraulics

Allen Rush

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ZANE

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Den N Ms

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souNdguy

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ZANE

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Den N Ms

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