Polyethylene hoppers resist rust, but they still need attention when warm weather arrives. Proper off-season care on poly salt and sand spreaders prevents hardened salt pockets, UV surface chalking, and seized bearings that show up on the first fall storm.
Step-by-step spring shutdown
First, empty every pound of material. Vibrating the hopper while augers run clears bridged salt better than shoveling alone. Rinse with fresh water and let the unit drain completely. Salt brine left in corners crystallizes over summer and can warp load sensors on electric units.
Next, grease auger bearings and spinner pivots per the maintenance chart. Poly walls flex slightly under load, so check mount brackets for fatigue cracks at welds and bolt holes. Touch up scratched paint on steel frames so road splash does not rust underlying metal.
Store under cover when possible. UV exposure fades graphics and can make poly brittle over many years. If outdoor storage is the only option, use a breathable cover and keep the tailgate slightly open so moisture does not trap inside.
Schedule a mid-summer electrical check on single electric spreaders even if the unit sits idle. Controllers and solenoids fail silently until October. Fixing them in August beats an emergency order during the first regional storm watch.
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