D6c 74a1769

That's a 1965 model.
Fairly decent tractor is a good description.

[quote="Old Magnet"]That's a 1965 model.
Fairly decent tractor is a good description.[/quote]


Good morning sir, sorry for the inconvenience if you are so kind, could you give me some specifications of hydraulic control # 46 I have a pump that tilts some cylinders but it has no force to lift them, I found broken springs in the valve I want to know if this is the root of the problem I leave an image showing the part where the broken springs are and if you can tell me what kind of valves are there. Thank you.

[attachment=54936]InkedHYD 46--1_LI.jpg[/attachment]

What function do these spring and valves do?
[attachment=54937]broken.jpg[/attachment][attachment=54937]broken.jpg[/attachment]

Hi Team,
the springs you show are from the Main System Relief Valve. It is a Pilot operated valve--the small valve opens and causes the bigger valve to then open--to keep it simple.

These old systems work on 1000 PSI system pressure.
Adjust the system pressure by adding/removing shims from under the short cap bolt on the small valve housing/body.

From experience with new springs and using the Parts Book shim stack they normally open at close enough to 1000 PSI.

The spring for the larger valve just makes sure it closes when ever the small valve is closed and is not adjusted.
The pilot valve is used so there is no need for a very large spring on the large valve to keep it closed as these systems are low pressure and high flow and so a large sized relief valve is needed to handle the high oil flow.

Sorry, if you require P/No's, I do not have a Part Book for these units to help further.

Cheers,
Eddie B.