Small hydraulic gear: Listen & Download Small hydraulic gear .mp3 Error! Change your browser, please! ⇓ Download Mechanical sounds ⚠ Foot pump inflating a mattress ⚠ Kick the bike speed switch ⚠ Chain, chain hoist ⚠ Hydraulic mechanism, on, off ⚠ Drawbridge raise chains ⚠ Hand winch ⚠ Small hydraulic gear ⚠ Drawbridge, lower chains ⚠ Bicycle hand pump ⚠ ★★★★★