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Old 05-19-2017, 08:24 AM   #1
fenster441952
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Lost Hydraulic lift

Hello to all..
I'm a 73 yr. old tractor rookie. I bought a 1952 NAA Ford tractor 2 years ago I have learned to drive it and use a brush hog. This spring I changed engine oil and filter..Transmission fluid..Hydraulic fluid, and differential fluid. A few days ago my son inlaw plowed his garden and I brush hoged a 1 acre field.. hydraulic lift worked great.
3 days ago my I decided to plow my own garden. Here is where my rookie mistake was made (I think). I lowered the
plow to a shallow setting..and started the first pass.. all was going good, but for some reason I stopped the tractor and failed to lift the plow before I exited the garden.. My hydraulics failed to lift the plow. I removed the plow. when I engaged the 3 point hitch it rose high, then fell quickly down. When it had weight on it it could not lift. Now it will stay when raised but bounces up and down 3 inches or so. Lower it down half way it stops and starts the bounce again. I don't see any loss of fluid.
Any suggestions possible remedies advice.. will be deeply appreciated!! Thanks Ray


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Old 05-19-2017, 09:48 AM   #2
rwilly
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That sounds like internal leakage to me


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Old 05-19-2017, 11:58 AM   #3
sixbales
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Howdy Ray, welcome to the tractor forum.

Sounds to me like your pump has lost pressure capability. See item #3 on attached pump diagram. Pump priming/Pressure test port. You can install a 3000 psi pressure gauge in this port to check the pump. Pressure should be 2000+ psi. You will need an adapter to
fit the pressure gauge threads to the port threads.

Have you checked the hydraulic fluid level?

Plug #17 on the diagram is a filler port for priming the pump if it has lost prime.

How long between bounces on the lift arms? These are normally referred to as "hiccups" and reflect internal leakage. My tractor hiccups about every 30 seconds with a 1050 Lb.
mower load on it. Most if not all lifts leak down to some degree......we live with this phenomena until we can no longer tolerate it.
File Type: pdf nh-60168-12379-60168-666000.pdf (172.2 KB, 4 views)

Last edited by sixbales; 05-19-2017 at 10:24 PM. Reason: Forgot attachment
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Old 05-19-2017, 02:06 PM   #4
fenster441952
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hydraulic leak

Thank You for info.! My friend is a car mechanic.. with the right info.. he will help me
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