than the unit is leaking and will probably not function properly leading to a violent nose wheel shimmy. Again get an engineer to look at it.
Would you believe I know a CFI who owned a Cessna 150 which had severe nosewheel shimmy. Rather than get the defect rectified (costs dollars) he merely dropped the nosewheel tyre pressure until the tyre looked awful flat (12 psi I think) and the shimmy wasn't as bad.