74 Ford 3000 3 point hydraulics bleed?

[Chancey77]

First post!!! first off THANKS so much for this site! It has helped me rebuild a 1954 Farmall cub complete engine overhaul and bolt to bolt restoration!
Now last week the guy I work for out me on another project. Resurrect a 74 ford 3000 from the grave it sat in for 12 years(the over grown ditch) and make it live again!!
So I spent the entire week rebuilding the Simms injection pump and making it run again. So now onto the hydraulics now!!!!
There is a check valve that has been stripped out because someone didn't realize it was a 16mm NOT A 5/8 #%^>!?€!!!!!
Is this where I bleed the system??? The book doesn't really help much and I am a smart guy and normally figure things out quickly but this hydraulic system had me baffled a bit...
The tractor had 3150hrs on it and yeah the filter should have been changed 1000hrs ago so I I should start there?? Change fluids and then.....??? I am not a tractor mechanic I build hot rods and bikes and as the Lucas wire system made me feel at home with my British bikes the hydraulics have left me scratching my head!
So.....
Take off the seat and top aux pump system and get down into the hydraulic housing to be the way right??? As I don't see a pan to drop out to get to the filter any easier way....
Not a problem I think..... But where do I bleed the system from???

 

[Chancey77]

Btw... For possible other people with a stripped out bolt...
I just welded on another smaller bolt onto the head so I had something not stripped out to actually put a wrench on just a little help from your neighborhood greaser

 

[Chancey77]

Ok still scratching my head today I have read all the threads here and done all they say to do... No air in the lines pump is working, but still no controls!
I started with draft down and pumped the crap out of the arms in mod position up and get some resistance but after a few minuets of pumpin it just goes easy again....
Anybody???? Please help before I grenade it

 

[Chancey77]

 

[Chancey77]

Well no replies;(
Here is pics of the pump off the tractor. And yes it is heavy! About 160lbs! I can't see any screens anywhere! I tore down the entire thing and blew air through the plastic pump hose and the piston moves freely and pushes up the arms.... Reinstalled and still no fluid is pumping through the piston! Arghhhhhhhh anyone out there???

 

[Soundguy]

pumping hte arms does nada. there is no solid connection from arms to the lift piston.

had this thread been int he old ford section.. I'd have seen it sooner.

Determine if you have hyd flow. pull the plug ont he 3x5 cover on the hyd top cover and crank tractor being ready to shut down quick. if you get oil at that port.. you have pump flow.

now from there. if you have pump flow but now 3pt. check the unloade and backpressure valves. the unlaoder can stick and dump oil to the sump. if BP valve is dead.. there is nothing to activate unloader.

 

[Soundguy]

by the way.. that ain't the PUMP.. the pump is up there in front of your left knee on the engine!

that's the lift cyl and valve body on the underside of the lift cover.

i sugest someone actually get a service manual if you are going to continue to work on this thing.!