Ford 3000 3 point

[civilinjun]

Hey Guys,
I'm new to both your forum, and to tractors. I recently bought a 1975 Ford 3000 to use for cleanup and leveling my property after tornado damage, tree removal. I got it for a good price and put it right to work.
After about 2 1/2-3 hours of dragging a 6' landscape rake I noticed a chattering sound and the hydraulics lifted the rake all the way to the top. It will lower once you kill the engine, but it immediately tops out when you start the engine. I also noticed a leak on the hydraulic pump, which I will be repairing this weekend.I do have a good bit of mechanical experience, just not with tractors. Any suggestions? Sorry for the short book!

Many Thanks,
Steve

 

[souNdguy]

the more info the better.. so don't appologize.

have you checked the condition of the fluid in the rear housing? if the oil is cloudy or contaminated the unloading valve can stick.

civilinjun.. sounds like a CE to me.. same thing I went to school for.

post back and let us know what you find on the oil.

soundguy

 

[civilinjun]

Oil is clean. It was a little low due to the pump leak (steady drip when running). I topped it off last night and got the same result. When you crank the engine, there's a 2-3 second delay, then the lift moves up. After it tops out you can hear a chattering sound from the pump.
I'm thinking it has to be some type of control valve not routing the fluid away from the piston. I guess I'll take the top off one evening and do some investigating. Where's a good place to get gaskets for it and the pump? Or is sealant sufficient for the top plate. That's what someone used on it before.
I'm not sure what you mean by CE. Please elaborate.

Steve

 

[civilinjun]

Nevermind. Found parts section on this site.

 

[souNdguy]

no goop on the top plate.. just use whatever gaskets and orings it wants.. goop causes it's own problems.

I mentioned it earlier.. but it is VERY LIKELY the unloading valve is sticking.. that's the valve that 'routes' all the oil around to where it's suposed to go ( basic non technical description there ).

CE = Civil Engineer ( EE= Electrical, ME= Mechanical.. etc.. )

soundguy

 

[civilinjun]

That's what I figured when I saw the bead around it. "This can't be good." I assume the unloading valve is in the top plate, similar to an automatic transmission valve body. I've been inside a few of those, so this shouldn't be a problem. I'll be studying the schematics in the IT repair manual tonight and will tear down as soon as the rain lets up.
I didn't connect CE with a tractor discussion... Sorry. I also looked around this site and found the needed parts. Thanks for the info.

Steve

 

[souNdguy]

the ce comment came from your handle.. civilinjun phonetically it sounds like civil engin.. etc.

the unload valve will be intrigal to the hyd cyl body that is bolted to the underside of the top plate.. if you have an exploded diagram in your manual you should be able to see it.. etc.

soundguy

 

[civilinjun]

That's a carryover from my drag racing days. Pontiac Lemans with a small block chevy=civilized indian

Many thanks for your help...

 

[souNdguy]

good luck on the unload valve.

soundguy