Re: 1963 ford 4000 hydraulics

souNdguy · Apr 5, 2015

Let's get those Hyde working.

Describe the issue.

Minorg64 · Apr 7, 2015

ok
The issue is 3pt hitch will not raise.
I drained all the old fluid and water that was in the Trans, hudraulic sump and rear end.
Sprayed it all out with diesel and let it drip for 24 hours. Refilled with clean hydraulic oil.
Started the tractor up and bled the pump using the pipe plug on top of the pump.
3 pt still not working. While tractor was running, I looked inside the hydraulic sump by looking into the fill plug and could see the hydraulic oil moving around.
Next I took the cover off of the hydraulic sump and checked the piston inside the cylinder bore. It free and ok. Put back together but 3pt still not working. Seems like no pressure

souNdguy · Apr 7, 2015

Very possible the unloaded valve is stuck, just dumping oil to the sump

Minorg64 · Apr 7, 2015

where is the unload valve and how do I unstick it.
What are the other possibilities of something else being stuck or bad.
Your help is greatly appreciated.

souNdguy · Apr 7, 2015

you will need a service manual as you will be pullingthe top cover and the valve block. get a top cover kit with another gasket and oring set and do all the orings.

There are other minor possibilities, like a blown out oring or bad backpressure working in conjunction with the unloader, not keeping it alive.

unloader valve is likely your cause.

mind you, it's burried treasure..

Minorg64 · Apr 7, 2015

thanks for your help.
Definitely need to get a repair manual

Minorg64 · Apr 14, 2015

ok took the top cover off of the hydraulic sump. Checked the cylinder bore n piston. Everything seemed ok n working. Under the cylinder bore I took off the end caps n pulled out the spring and shaft assembly. No o rings there. Blew out all passages with compressed air n everything was clear.
Put compressed air into the back tube in hydraulic sump n it blew air into the sump. Put compressed air into the front tube and it blew out hydraulic fluid from the front of the pump. Put compressed air into the top of the pump and fluid came out of the front tube that goes into the top cover. So seems like all the tubes n passages r clear. Just no pressure from the pump. Oh after I put it back together n started it up I bled the pump from the top pipe plug.
Still no hydraulics

JMOR · Apr 14, 2015

(quoted from post at 15:42:42 04/14/15) ok took the top cover off of the hydraulic sump. Checked the cylinder bore n piston. Everything seemed ok n working. Under the cylinder bore I took off the end caps n pulled out the spring and shaft assembly. No o rings there. Blew out all passages with compressed air n everything was clear.
Put compressed air into the back tube in hydraulic sump n it blew air into the sump. Put compressed air into the front tube and it blew out hydraulic fluid from the front of the pump. Put compressed air into the top of the pump and fluid came out of the front tube that goes into the top cover. So seems like all the tubes n passages r clear. Just no pressure from the pump. Oh after I put it back together n started it up I bled the pump from the top pipe plug.
Still no hydraulics

nd..............what about the unloader valve that he told you to check?

souNdguy · Apr 14, 2015

If the unloader is stuck in unload position,not will build NO pressure as it is dumping oil to sump.

That's why we keep telling you to check it.

Minorg64 · Apr 14, 2015

i am assuming that the unloade valve is the part that goes under the cylinder bore. It has a spring on one side of it and the other end of it moves in and out as u raise and lower the hand control for the 3 pt hitch.
I checked it and it is not stuck in the bore. It moves freely when u raise and lower the handle for the 3pt hitch.
Also I replaced the cover and started the tractor. With it running I removed the side plate and looked inside with a flashlight. There is no hydraulic moving or leaking from anywhere.

Minorg64 · Apr 14, 2015

i was told by a friend that the tractor is supposed to have some type of hand valve that goes on the top plate of the hydraulic cover. Mine has a plug. No valve. This could be the problem.

JMOR · Apr 14, 2015

(quoted from post at 17:03:09 04/14/15) i was told by a friend that the tractor is supposed to have some type of hand valve that goes on the top plate of the hydraulic cover. Mine has a plug. No valve. This could be the problem.

o

JMOR · Apr 14, 2015

(quoted from post at 16:58:11 04/14/15) i am assuming that the unloade valve is the part that goes under the cylinder bore. It has a spring on one side of it and the other end of it moves in and out as u raise and lower the hand control for the 3 pt hitch.
I checked it and it is not stuck in the bore. It moves freely when u raise and lower the handle for the 3pt hitch.
Also I replaced the cover and started the tractor. With it running I removed the side plate and looked inside with a flashlight. There is no hydraulic moving or leaking from anywhere.

our unloader valve will be very much like this one:

Minorg64 · Apr 14, 2015

ok I recognize that part as the one that I removed from under the cylinder bore. Both ends had plates on them. One end had a spring inside and on the other end was the valve and it was attached to some linkage that attached to the handle to raise and lower the 3pt hitch. That valve is not stuck in the bore. It moves freely.

JMOR · Apr 14, 2015

(quoted from post at 19:02:35 04/14/15) ok I recognize that part as the one that I removed from under the cylinder bore. Both ends had plates on them. One end had a spring inside and on the other end was the valve and it was attached to some linkage that attached to the handle to raise and lower the 3pt hitch. That valve is not stuck in the bore. It moves freely.

orry, Sir, but that unloader valve pictured has no linkage attached to it, nor does it have a spring associated with it.

peachhead · Apr 14, 2015

Maybe a dumb question but are you sure you are not in draft position (draft control horizontal)?

I don't think this is a 3000 diagram but it's generally close, note the position of the unload valve.

[/img]

JMOR · Apr 14, 2015

(quoted from post at 21:39:33 04/14/15) Maybe a dumb question but are you sure you are not in draft position (draft control horizontal)?

I don't think this is a 3000 diagram but it's generally close, note the position of the unload valve.

[/img]

raft or Position, in either, it should still lift. Nice to see my old sketches still getting around.

Minorg64 · Apr 15, 2015

The lever is in position control not draft control. Looks like I was talking about the lever control assembly. Guess I will have to take the cover off again and check for the unloading valve again.

JMOR · Apr 15, 2015

(quoted from post at 08:14:34 04/15/15) The lever is in position control not draft control. Looks like I was talking about the lever control assembly. Guess I will have to take the cover off again and check for the unloading valve again.

on't hesitate to come back while you have it opened up.

Minorg64 · Apr 15, 2015

ok I'm at work right now but hopefully I will be able to get to it this evening. How do I get pics on here to show u guys. Tried copying them from my photos but it won't let me

JMOR · Apr 15, 2015

(quoted from post at 10:07:15 04/15/15) ok I'm at work right now but hopefully I will be able to get to it this evening. How do I get pics on here to show u guys. Tried copying them from my photos but it won't let me

hen you select "reply' or "quote", in order to reply to one of our posts, just scroll down a little & see "upload photo", "select gallery photo" , etc. You need to upload the photo you want to send, then select it to include it in your message/post.

Minorg64 · Apr 15, 2015

ok thanks I will try that. I appreciate ur time

Minorg64 · Apr 15, 2015

Trying with a couple pics that I took yesterday to c if I'm doing it right.
On the top plate right in front of where the seat goes a friend told me that there should be a flow control valve there and that the hydraulics wi not work with the plug in it

JMOR · Apr 15, 2015

(quoted from post at 10:31:56 04/15/15)

Trying with a couple pics that I took yesterday to c if I'm doing it right.
On the top plate right in front of where the seat goes a friend told me that there should be a flow control valve there and that the hydraulics wi not work with the plug in it

our friend is wrong.

peachhead · Apr 15, 2015

The thing in the red square is the flow control valve. It's on the right hand side. (ignore the red circle) The cover in front of your seat is fine, won't have anything to do with it.

JMOR · Apr 15, 2015

(quoted from post at 18:19:01 04/15/15) The thing in the red square is the flow control valve. It's on the right hand side. (ignore the red circle) The cover in front of your seat is fine, won't have anything to do with it.

could be wrong, but your picture is probably a later model than his & thus comparing apples & oranges , since his has no flow control valve as pictured.

peachhead · Apr 15, 2015

[/quote]

Dang, you're right; I forgot this was older. Sorry about that.

JMOR · Apr 15, 2015

(quoted from post at 19:56:01 04/15/15)

could be wrong, but your picture is probably a later model than his & thus comparing apples & oranges , since his has no flow control valve as pictured.[/quote]o problem. Under right circumstances, it could have been valuable info.

Re: 1963 ford 4000 hydraulics

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