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