No movement in lift cylinder

[J_J]

Hydraulic Control Valves | Hydraulic Flow Control Valve | Flomatic Corporation

PSI Hydraulic Fuses

 

[wdchyd]

Are these still available? Can I run it without the valve?

Thanks, kirk

the valve is a safety.....it can be bypassed to troubleshoot....in my experience it is rare that those can go wrong, but anything is possible in hydraulics....especially if someone messed with it

You can always add another in the future but they are rated in gpm so some investigation would be needed to figure out which flow valve would work or use an adjustable flow control

Did you disconnect that upper hose yet while trying to lift?...what happened?

 

[Augustine Ndam]

How does the hydraulic fluid propel the piston of the fork lifter?

 

[Augustine Ndam]

Do you sale hydraulic pumps that one can use in the construction of compressors, litters?

 

[Kirk-NJ]

Thanks for all the help.

Kirk

 

[Kirk-NJ]

the valve is a safety.....it can be bypassed to troubleshoot....in my experience it is rare that those can go wrong, but anything is possible in hydraulics....especially if someone messed with it

You can always add another in the future but they are rated in gpm so some investigation would be needed to figure out which flow valve would work or use an adjustable flow control

Did you disconnect that upper hose yet while trying to lift?...what happened?

Yes I disconnect the top hose when lifting and nothing came out.
I suspect the retainer clip end broke off and is lodged in the valve somewhere, you can see this in my photo.
Might not be able to get to it for a while cause I'm starting to get busy with other things.
I'll check the pump for GPM. if it doesn't have it on there I think the 4000 backhoe used the same one and someone might know on that.

kirk

 

[john_bud]

The thingy you showed is (I think) a device to limit fluid flow in one direction (down). It's there to limit the speed of drop in case of a hose rupture also to keep a max weight load from coming down uncontrolled. On the 4000 hd industrials it's a cup in a cylinder.

The pump should be about 25gpm at 1700 rpm. (From memory)

Here's what I would do in your place;

1- remove the hose from the cylinder (end in a clean bucket) and verify there is strong flow. Push out a couple gallons. That will determine if they control is good or not. It should dump 2 gallons in about 12 seconds at idle (550 rpm). Kill the engine at 2 gal.

If the flow is restricted, take the control valve segments apart and find out why. I suspect the control valve. It uses o-rings and square edge rings. Common and easy to find in a hydraulic store (brick or digital). Look online at fnh website for the part breakdown. Look at the check ball too. Could be the issue.

2- inspect the fluid for water (milky), particles, chunks of seals or packing. The debris will help id what failed. Pour the fluid back through a funnel, filter debris with a clean old tshirt.

3- inspect the cylinder inlet for blockage.

4- take apart the cylinder and repack / reseal. If there is debris, you should probably take apart the rest of the cylinders or the will probably also fail. And the tank and lines should be flushed / cleaned. Pita!

 

[Kirk-NJ]

Thanks John. I've gotten busy getting ready to plant. Might be a while before I get back to it.