SCRAPER SYSTEMS Hog Slat Inc. Newton Grove, NC USA February 2022 4 Construction of the Pit To ensure satisfactory operation of the scraper system, the depth of the pit must be 8” minimum below the slat floor. Recommended depth of the pit is 12”. Interior walls of the pit must be free of any voids or protrusions which could cause the scraper to bind during operation. Pit bottom must be concrete. For retrofitting into existing pits, all cracks, voids and seams must be repaired with suitable concrete patch repair materials. Marking Gutters Find and mark center line of each gutter with a chalk line. On two-gutter systems, mark the crossovers also as the lines will intersect each other showing the location where the corner wheel assemblies are to be installed. Install Power Unit and Corner Wheels According to your system layout design plan (see Figure 1), place the power unit and corner wheel assemblies in their approximate locations. Before fastening these units in place, be sure to align them properly so that the cable will be in the center of the pit. The corner wheels should be installed on the opposite end of the building from the power unit. On single-gutter units the corner wheel can be mounted horizontally or vertically. Install the non-adjustable corner wheels on the same end as the power unit. Locate the corner wheels as shown on the drawing. See Figure 1. The power unit can be installed in several positions according to your gutter width and building design. Position the cable drive cable pulley in line with the cable and secure the power unit to the floor or wall with adjustable brackets. Normally, two wraps of the cable is sufficient to pull the blades. Always use stainless steel cable. Remove gearbox vent plug before operating system. The power unit and corner wheel assemblies should be secured to the floor and /or walls with lag bolts and cement anchors. Increasing or decreasing cable tension can be achieved by adjusting the power unit adjustment bolt.
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