EElevator has good advice. Check motor wiring and motor to pump connection we had a lose one hake lots of noise. If its a air up muffler that can be your problem too. Very problematic and we quit using them. Here is what we found alot has to do with the fact during the mod customer gets use to the quiet. Then they think the new elevator is noisier. We started getting noise level measurements before mods start. Make sure when you refill tank after checking pump to motor connection you put as much oil in the tank as you can.
