engine hatch lifting pistons or drive screw?

[sawdustdad]

That "grinding" sound is likely the clutch in the actuator. When all the way down, the clutch actuates, same all the way up. does it make this sound in both directions? If so, the clutch might be worn out. If it's only making it in one direction, likely that's down. The other direction might not be hooked up? I added a pair of pneumatic helper struts to my 3300 open as the single actuator was stressed lifting the deck. My 3700 has two actuators, so no issues.