AT-6 Chino

Fuel selector gearbox

April 26, 2008 10:44 pm

This gadget is what I call the “Fuel Selector Gearbox.” I’m sure it has a more correct nomenclature in the parts manual, but I’m too lazy to look it up at the moment.

The ends of the two sticks fit into the fuel selector controls, one in each cockpit. As you rotate the fuel selectors, the sticks rotate via a set of gears in the housing on the lower left of the first photo. his keeps the two fuel selector controls synchronized. Finally, the output of the gearbox (the forked looking part) rotates another rod that is connected to the actual valve located inside the wing center section. Stay tuned and we’ll get this thing disassembled so you can see the inside of the gearbox. 

Fuel selector gearbox

Fuel selector gearbox

Fuel selector gearbox

 

OK, here we are two weekends later! I wire wheeled the paint and corrosion off of the steel shafts, etched them and painted the shafts silver. In the meantime, Bill chemically stripped the aluminum housing then etched, alodined and painted it.

Here it is with the shafts in place in the housing, waiting for me to add some grease to lube the gears and then bolt the two halves of the housing back together. 

Gearbox

 

And here is the finished product! Note how Bill has sanded and clearcoated the micarta block to refinish it. I had to remove the safetied taper pin and pull the U-Joint off to remove the micarta block for refinishing and to paint the rod.

Gearbox

 

Here is a closeup of the assembled housing with new bolt, nuts and washers installed to pretty it up.

Gearbox

 

And the finished assembly…

Gearbox