Wheat milling production line Hands-on maintenance + troubleshooting guide

Many owners and workers on Wheat milling production line focus solely on running the machines and neglect maintenance, believing that they can simply repair them when they break down. However, this neglect leads to frequent problems: frequent material blockages, inconsistent flour quality, excessive machine noise, dust filling the workshop, and ever-increasing electricity bills. At best, it causes production stoppages and delivery delays; at worst, core components like grinding rollers and sieves wear out, requiring expensive replacements.

Time-Based Maintenance

The wheat milling production line is divided into several stages: wheat cleaning, wetting, grinding, sifting, dust removal, and packaging. Maintenance is divided into daily, weekly, and yearly tasks, distributing the workload evenly and avoiding the need for large amounts of time at once.

Daily Pre-Start and Post-End

Maintenance Before starting the wheat milling production line, perform a simple walk around the machine: First, check if all motors and bearings have sufficient lubrication; replenish if necessary. Check the conveyor belts and chains for looseness; tighten if needed to prevent slippage. Clean any nails or slag stuck to the magnets, as hard objects rolling into the grinding rollers can damage the equipment. Then, check the dust collector bags for holes; leaks in the ducts can cause dust to fly everywhere in the workshop.

Clean up after power off at the end of the day’s production: Scrape off any flour and bran stuck in the gaps of the grinding rollers; sweep away all the broken wheat and flour residue stuck on the sieve surface, as they will clump if left overnight due to moisture; clear the dust accumulated in the dust collector; clean up any wheat and flour scattered outside the machine, as they are prone to mold and spoilage if left for a long time.

Half a day off each week for deep cleaning

Disassemble the filters of the wheat washing and stone removal machines and rinse away the wheat bran and sand clogging them; open the mill casing and clean the stubborn clumps in the roller gaps, and check the wear of the grinding teeth; remove all dust collector bags, shake off the accumulated dust, and replace any broken ones; check the elevator hopper for missing screws or deformation, and tighten any loose parts; disassemble and rinse the water tank and filter screen of the wheat wetting machine to prevent water circuit blockage; clean the fan of the electrical control box, as excessive dust can easily cause short circuits and tripping.

A comprehensive overhaul is carried out once a year.

The wheat milling production line disassembled all grinding rollers for inspection, repairing or replacing any that showed worn-out teeth or poor grinding performance; all screens and sealing strips were replaced; the blowers were disassembled, cleaned, and balanced to prevent severe vibrations during high-speed operation; the entire conveying pipeline was disassembled to clean out years of accumulated powder, which posed a risk of spontaneous combustion; all bearing oil seals were replaced and new grease was added; electrical wiring was inspected, and aging wires were replaced; the water-lubricating and drying equipment was descaled; and the packaging scales and moisture meters were calibrated to ensure accurate measurement.

Five common factory malfunctions: step-by-step self-check and repair.

Fault 1: The machine frequently clogs, preventing wheat from being fed in and causing flour to overflow from the pipes. Material buildup is visible on the elevator, and the wheat milling production line inlet is blocked.

Troubleshooting sequence: First, check if the screen used for washing wheat is broken; too much broken wheat chaff can easily clog the pipes. Next, check the dust collector fan; excessive dust accumulation in the filter bags may reduce suction. Too high a moisture content in the wheat washing process can cause the wheat to stick to the machine’s inner walls. Worn airlock blades can cause air leakage and disrupt internal airflow.

Solutions: Stop the machine and clear any blockages in the pipes; replace broken screens and clogged filter bags. Adjust the wheat moisture content to 15.5%-16.5%. Replace worn airlocks. Clean the machine promptly at the end of each workday to prevent the flour from solidifying and clogging the pipes.

Fault 2: Flour of inconsistent coarseness and numerous black spots on bran, manufacturers refuse to accept goods.

Flour from the same batch in the wheat milling production line is uneven in coarseness, with excessive ash content and numerous bran specks.

Troubleshooting sequence: Damaged sieve mesh, flour leakage from the sieve frame sealing strip; uneven gaps between the two grinding rollers; inappropriate blower airflow, resulting in incomplete bran separation; inadequate wheat washing and iron removal, allowing mud and impurities to mix into the raw materials.

Solutions: Replace damaged sieve mesh and tighten the sealing strip; uniformly calibrate the gaps between the left and right grinding rollers; fine-tune the air damper to improve bran separation; clean the magnets daily and flush the destoner weekly to reduce impurities at the source.

Fault 3: Excessive machine vibration, harsh noise, and hot bearings.

The blower and mill in the wheat milling production line are making abnormal noises, the machine body is shaking violently, and the bearings are hot to the touch.

Troubleshooting sequence: Insufficient bearing lubrication causing dry grinding; uneven dust accumulation on the blower impeller; loose machine foundation bolts; stones and iron blocks falling into the grinding rollers and impacting the mill.

Solutions: Stop the machine and add lubricating oil; replace the burnt bearing directly; clean the fan impeller and balance it; tighten all foundation bolts and install shock-absorbing pads; strengthen the initial stone and iron removal process to prevent hard objects from entering the grinding area.

Fault 4: Dust fills the workshop, failing environmental inspection.

Flour is everywhere during wheat milling production, and dust collectors are completely ineffective.

Troubleshooting sequence: Damaged filter bags, leaking pipe joints; faulty airlocks causing powder backflow; insufficient fan suction; long-term cleaning of filter bags leading to clogged ducts and reduced airflow.

Solutions: Replace filter bags; install sealing gaskets in pipe gaps; repair airlocks; empty the dust hopper weekly; keep the dust collector fan running throughout production.

Fault 5: Production unchanged, but electricity costs have increased significantly.

The wheat milling production line consumes significantly more electricity and operates more slowly while processing one ton of wheat.

Troubleshooting sequence: Insufficient bearing lubrication causing high operating resistance; material accumulation in pipes hindering material transport; aging and slipping belts and chains; aging and reduced motor power.

Solutions: Regular maintenance and lubrication; annual inspection and unclogging of the entire pipeline; periodic replacement of transmission components; replace old, power-consuming motors with energy-efficient models.

Safety Details to Note During Routine Maintenance

1. Always disconnect the main power supply and hang warning signs before any cleaning or maintenance work on the wheat milling production line. Disassembly while the machine is energized is strictly prohibited.

2. Use only food-grade lubricating oil to avoid contaminating the flour with grease.

3. Do not directly wash the electrical control box and motor with water. Clean dust with a brush or compressed air.

4. Filter the circulating wheat washing water regularly, as excessive sediment will accelerate wear on the grinding rollers.

5. If production is stopped for more than one day, empty all wheat and flour from inside the machine to prevent moisture, mold, and clumping.

6. Do not attempt to repair minor noises or flour leakage. Stop the machine immediately for inspection. Delaying minor problems can lead to major malfunctions and double the repair costs.

Manufacturer-Supported After-Sales Service

Aikemi Intelligent Equipment (Henan) is a source factory. Every roller mill wheat grinding line we ship comes with a complete maintenance manual. We supply easily worn parts such as grinding rollers, screens, and fans at original factory prices. Our products are CE certified for export. For customers in Southeast Asia and the Middle East, we offer online remote maintenance guidance. For major equipment problems, our engineers will provide on-site repair.

Frequently Asked Questions from Workers

Q1: What if a new worker on the wheat milling production line can’t remember the maintenance steps?

A: Print out the daily and weekly maintenance checklist and post it on the wall of the control room. Check off each item as it’s completed. It’s simple and easy to follow.

Q2: If the wheat milling production line machine is slightly clogged, can I reach in and remove the clog by hand without stopping the machine?

A: Absolutely not. The power must be turned off and the machine stopped before unclogging. Running the rollers can easily cause a safety accident.

Q3: How often should the grinding rollers on the wheat milling production line be replaced?

A: With proper maintenance, replace them every 2-3 years. If stones or iron pieces frequently get in, they will wear out and become unusable within a year.

Q4: How often should the dust collector bags on a wheat milling production line be replaced?

A: If cleaning is done weekly, they should be replaced every 6 to 8 months. In damp, dusty areas, they should be replaced every 4 months.