Off-Season Maintenance Tips for Berry Processing Equipment
Get Ready for Next Season
Once the last berries are run, the off-season is the best time to get your receiving and processing line ready for next year. Berry juice is sticky and acidic, so residue left on equipment over the winter can lead to corrosion, mold, and sanitation problems. A few hours of cleanup and inspection now helps prevent breakdowns during a short harvest window.
Before you start: Lock out and tag out all equipment before cleaning, inspecting, or opening any electrical enclosure, and follow your plant’s safety procedures.
1. Clean and Sanitize
- Remove buildup: Use a food-safe alkaline cleaner to break down berry sugars, pulp, and skins on dumpers, hoppers, conveyors, sorting tables, and belts.
- Rinse thoroughly: Chlorine-based sanitizers and acidic fruit residue can pit stainless steel if left in place. Rinse after cleaning, and sanitize according to your chemical supplier’s directions.
- Dry completely: Standing water invites mold and bacteria. Let equipment dry fully before storage, and treat any painted or carbon steel parts with a food-grade rust inhibitor.
- Service container washers: Flush spray nozzles, clean tank screens and strainers, and drain all tanks.
2. Conveyors and Mechanical Components
- Inspect belts: Check conveyor belts for fraying, tears, or staining. On modular plastic belting, look for cracked flights and broken links.
- Relieve tension: Release belt and chain tension for long-term storage to reduce stretching and bearing load. Note your settings so they are easy to restore at startup.
- Check bearings and rollers: Spin pulleys and rollers by hand and listen for roughness or noise. Purge bearings with fresh food-grade grease to push out water left from washdown.
- Check dumper wear points: Inspect pivots, guides, and hopper surfaces for wear, and lubricate according to the maintenance schedule in your manual.
3. Hydraulic, Air, and Water Systems
- Hydraulics: Check hoses and fittings for leaks, chafing, or wear. Milky oil means water contamination, often from high-pressure washdown. Drain, flush, and refill, and replace the filter before startup.
- Compressed air: Drain water separators, replace filters, and service the compressor. Moisture left in air lines can freeze or cause valves and cylinders to stick.
- Water lines: Drain pumps, hoses, spray manifolds, and any water lines in unheated areas. Where water cannot be fully drained, use non-toxic RV antifreeze, and flush and sanitize the system before running product next season.
4. Controls and Sensors
- Clean sensors: Wipe down photo eyes, level sensors, and proximity sensors, and check that they are secure and aligned.
- Keep pests out: Fruit sugars attract rodents. With power locked out, have a qualified person inspect control panels and junction boxes for droppings, nesting, or chewed wiring. Make sure enclosure doors latch, gaskets seal, and unused openings are closed.
- Check for moisture: Look for condensation or corrosion inside enclosures.
- Back up programs: Make sure you have a current backup of your PLC and touchscreen programs.
5. Plan for Startup
- Make a parts list now: Write down worn belts, bearings, and other parts you find during cleanup so they can be ordered well ahead of harvest.
- Note issues from the season: Ask operators about faults, jams, or alarms they saw this year so those can be addressed before startup.
If you would like help with off-season service, replacement parts, or upgrades to your dumpers, conveyors, washers, or controls, give us a call at 360-393-4108 or email sales@innotechmetals.com.