The muller pressure can be changed by adjusting the flat tension spring to apply a precise amount of pressure for each specific mulling application. Clearance between the muller wheel and base plate can be adjusted to handle various grades of sand with utmost efficiency. Quadruple-lipped grease and dirt seals protect both the axle shaft and the bearings to provide maximum bearing life. The pivot joints are enclosed by oil resistant bellow-type dust covers, giving the wheel joints and moving parts complete protection from the abrasive action of the sand. Multiple lip sand seals located inside the vertical drive shaft housing, prevent sand from entering the drive shaft and cross head castings.
All plows are hard surfaced along the leading edge with a tungsten carbide layer.
Removing the crib provides access to working parts and makes it possible to give the muller the type of total cleanup that keeps its mulling efficiency high, and wear and tear at a minimum. The operation is as simple as removing four bolts, then lifting the crib from its base. The plow operation makes discharge automatic and makes the muller practically self cleaning. Discharge requires about ten seconds. The door is adjustable to compensate for normal wear.