There is only an adjustment to the auger. It is at the left end of the bin when facing the unit from the motor side. There are knobs to allow removal of the guard and auger located on the end opposite of the motor end. I have found by removing these two items and using water pressure I am able to successfully clean the unit. I also rotate the rollers by hand while spraying.

With regard to the rollers I don't believe that they can be adjusted. They will move themselves in case of any solid or large objects accidentally going through but otherwise the rollers have never been an issue because the factory setting is extremely good. The manufacturers recommend that you not make any adjustments at all because the rollers often get out of sync if you do. If you really really need to make the adjustment there is an instruction for doing so with the destemmer. It's a pdf sheet. My answer wouldn't let me post the site unfortunately. The range of adjustment is very limited though. Maybe a couple of tenths of an inch at best. Again not recommended. Cleaning is time-consuming and just requires patience. I've used a number of different crushers and this one is pretty average for cleaning. The best way I've found is to get out your power washer and start the top and work your way down through the machine. Then tip it on its side and work your way through the underside rotating the auger and rollers in order to get all the grapes and stems out. It just takes time. Seems endless but eventually it comes clean and free of debris.

Yes you can remove one roller so it won't crush the grapes and just destemming will happen. It takes a bit longer to go thru fermentation without the crushed grapes but it worked great.

It is not intended to be operated that way. Removing the rollers would require some changes in the drive train. The grapes are fed into the destemmer by the rollers so if they are removed there will be problems getting the correct feed rate. I recommend opening the gap between the rollers so that the crushing is minimized which this crusher destemmer allows.

Hi Donna I don't know why you would want to remove the rollers other than to clean them and that is not necessary. The rollers are what destem the grapes. This machine is amazing. It can destem a 25 pound box of grapes in about a minute and a half. About 80-90% of the stems are removed from the grapes. The rest we remove by hand.

They probably can but I don't know if you'll get a full destemming from that. The rollers are integral to the process.