FT404 Hydraulics Confusion

[traktorz]

Looking at the hydraulic output on this tractor, we find there are five quick connect outlets in total; Two dual-action pairs plus one single connector. In addition there are one plugged output as well, making a grand total of six hydraulic outputs at the rear of the tractor.

Positioned in the drivers seat, we find the two levers, that controls the two dual-action pairs of quick connectors.
But what about the single output quick connector? How to operate and control this one?
And what about the plugged output, how is that supposed to be used and controlled?

From the photos we can see that the leftmost pair of quick connectors are connected via tubes to the joystick controlling the front loader. But we have to lock the leftmost lever (located near the drivers left hip) with a rubber strap in the retracted position, in order to operate the front loader. Maybe a rather primitive workaround, but that's how the the tractor and front loader was setup and delivered.

With the rubber strap locking the leftmost lever, we cannot use the rear three point lift. For that operation, we first need to have the leftmost lever in neutral position, which means temporarily untie the strap.

Furthermore, under a rubber lid, under the drivers seat, there is a valve knob, controlling the lowering speed of the three point lifter. We'll have to examine the function of this, once we have an implement attached.

There's alot more capability of the hydraulics on this newer tractor, compared to our old one, a Ferguson "Grålle" TEA-20B. But also more to learn. The front loader impresses us most, with its self-leveling bucket and smooth joystick control.

Hydraulic control levers at the driver's seat:


Grand total of six hydraulic outputs :


Joystick controlling the front loader:


(2.15.1.5 Adjustment of lowering speed):

[GuglioLS]

To me, it looks like your dealer took a shortcut plumbing the loader into the remote like that. Personally I would re-route the loader plumbing as follows:

Remove the loader hoses from the rear remotes, then take that rubber band off the remote valve - this should restore normal TPH operation

Disconnect the high pressure output from the pump and plumb it directly to the In of the loader valve, then the out of the loader valve goes to the other side of where the output of the pump used to go.

The capped off tube out the back of the tractor is the drain for the hydraulic reservoir.

The lone remote quick connect is what's called a "half remote" it can be used for single action cylinders such as what is sometimes found on dump trailers. That remote is usually operated by the TPH lever. To activate that half remote there is usually a bolt sticking out the left side of the TPH box around the center of the lift box and it must be tightened to activate the half remote, then the TPH lever is used to operate the remote Those half remotes are pretty much useless.

If you decide to re-plumb the hydraulics, make sure to do it right so that the pump does not "dead head". Which meaning the fluid has no place to go and usually results in the pump splitting in two. Always make sure there is a path for the fluid to flow freely from the pump through all the valves then back to the tank.

Larry

[roy697]

Man is that one clean tractor!

[bradblazer]

Lile Larry said (pretty much ).

On my Kama, there is one difference from Larry's routing in that the loader valve comes after the rear remote valve. Your rear remote should have a low pressure return separate from the "power beyond" line going to the 3ph box. You can re-route the power beyond line to the loader valve inlet. Ideally you should get a power beyond adapter for the loader valve (if it doesn't already have one) which separates the low pressure return from the high pressure outlet which gets routed back to the 3ph box.

The advantage of going to the rear remotes first, especially if your loader valve detaches with the loader, is that your pump is always protected by the relief in the rear remote valve. That's part of the reason why it has the separate low pressure return.

Brad