Guys,

Can someone tell me what the two items in the pics are? I cannot figure out how to use them or really what they are use for. I know they go with a retract system but what are their function.?

A better picture of the label would help. What does it say besides "Sonictronics" (the manufacturer)?

Dr.1

Looks like Hydra-Locks; converts pnuematic retracts to use oil instead of air to move the retract pistons. It's supposed to have a much smoother movement than regular air retracts. I believe they are no longer being produced.

They are Hydro-lock. made by sonictronics. I didn't know what they were used for. Do you know how the are hooked up with the retracts.

I have instructions somewhere.they will have to be filled with oil at one end atf was recomended as long as it did not affect the seals in the retracts.

Add from march 1980 model aviation. I would not be surprised if this is the product that Sonictronics may have later produced. One note this type of conversion would i suspect would not be functional with spring/air types such as the Springairs or the Robart copy of the Springair.

John

I don't have the instructions. Here is a notional view of how they are used.

Hydra-locks I still have the instructions on how to use them. I can copy them for you if your interested? Vic G.

Try contacting http://sonictronics.com/xcart/customer/home.php