Find resources for getting started, installation, troubleshooting and preventative maintenance for your dental delivery system
Open the Classic Series Cart- Models made BEFORE 2015 [66-4002]
"Sometimes you may need to get into the cart for general maintenance. If your cart was manufactured BEFORE 2015, watch this step-by-step video on how to open the cover of the ASI Classic cart.
![How to Program Your W&H Handpieces [66-4048]](https://cdn-thumbnails.sproutvideo.com/729ad2b9181ae2c1f8/69228cd6a0a5aae9/1790801410/w_600,h_338,animate_false,fit_contain,fillbg_b,g_faces/poster.jpg?v=1790805442)
![Replace the Master Air Regulator - Units Made Before August 2016 [66-4013]](https://cdn-thumbnails.sproutvideo.com/ac90d3b31918e2c525/d93bb433970d1d2c/1699638711/w_600,h_338,animate_false,fit_contain,fillbg_b,g_faces/poster.jpg?v=1756939489)
![Replace the Master Air Regulator - Units Made After August 2016 [66-4012]](https://cdn-thumbnails.sproutvideo.com/7990d3b31918e2c4f0/21a534a43d94058b/1699639309/w_600,h_338,animate_false,fit_contain,fillbg_b,g_faces/poster.jpg?v=1756939489)
![Replace the Control Block Diaphragm Pucks [66-4007]](https://cdn-thumbnails.sproutvideo.com/4490d3b31e16e2c4cd/6206d9403cfbee3e/1699897359/w_600,h_338,animate_false,fit_contain,fillbg_b,g_faces/poster.jpg?v=1756939581)