The Servonaut SMB (Sound Module Bagger) is a German made Excavator sound system with pre installed sounds. Here I show you how to set it up using a Flysky I6S with 4 mixing channels but it should work on any system with mix capability and two spare receiver channels.
NB: you don’t need the SWB switch that I have on channel 6 active, this was a legacy from when I was trialling settings so ignore that. So its as follows
switch SWB goes to your motor to start the pump (in my instance its channel 5)
Switch SWC goes to the clear sound lead) 7 in my case
These switches are 3 way and need to be in the central neutral position when running your rig to avoid blocking sounds on the channels.