Proper maintenance keeps your vibrating screen running efficiently, prevents unexpected breakdowns, and extends its working life. This article introduces the maintenance of vibrating screen.
1. Weekly Maintenance (30–60 minutes)
Once a week, do a more thorough inspection.
Tighten all bolts
- Vibration loosens bolts faster than any other machine. Pay special attention to:
- Vibrator mounting bolts (most critical)
- Motor base bolts
- Spring retaining bolts
- Screen box connection bolts
- Feed and discharge chute bolts
Inspect the screen deck
- Look for holes, tears, or worn spots.
- If wire diameter has worn down by 30% or more, plan to replace the mesh soon.
- Check tension – loose mesh flaps, makes noise, and wears out quickly.
Clean the screen
- Remove material buildup from:
- Under the deck (where fines collect)
- Around the springs
- On the side plates
- Inside the discharge chute
Check amplitude (shake strength)
- Stick a piece of tape on the side plate. Draw a small circle.
- Run the screen for a few seconds, then stop.
- The circle becomes an oval – measure its width. That is your amplitude.
- For most mining screens, amplitude should be 6–10 mm.
- If it has dropped 20% from last month, inspect springs and eccentric weights.
2. Monthly Maintenance (1–2 hours)
Grease the bearings
- Vibrating screen bearings need clean, fresh grease.
- Grease type: Use high-quality lithium or polyurea grease with EP (extreme pressure) additives. Never mix different greases.
- How often: Add grease every 2 months (once a month in hot or dusty conditions). Completely change grease every 6 months.
Inspect springs thoroughly
- All springs should have the same height (no crushed or sagging ones).
- Check for cracks in rubber springs or broken coils in steel springs.
- Replace damaged springs in full sets (all springs on the same side together). Never replace just one spring.
Check feed box and chute liners
- Worn liners will eventually wear through the steel plate.
- Replace liners when thickness is below 30% of original.
3. Long-Term Maintenance (Every 6–12 months)
Replace bearings
- Even with perfect lubrication, bearings have a limited life.
- Heavy-duty mining: replace every 6–8 months.
- Medium duty (aggregates): replace every 12 months.
- Light duty: every 18–24 months.
Replace rubber springs
- Rubber ages even without visible cracks. Replace all rubber springs every 2–3 years.
Inspect and repair cracks
- Look for cracks on side plates and crossbeams.
- Small cracks: drill a 5 mm hole at the end of the crack, grind, then weld.
- Large cracks: call a professional – running with a large crack is dangerous.
Repaint and protect against rust
- In wet or chemical environments, rust eats through the screen box. Touch up paint chips immediately.
Luoyang Dahua Heavy Industry is a high-tech enterprise with research & development production, sales, and service. Our company not only guarantees the products quality, but also provides perfect after-sales service. Luoyang Dahua has a professional R & D team, a strong after-sales team, from the equipment selection, site inspection, equipment manufacturing, installation, commissioning, delivery and other aspects for your service. If you have any questions, please contact us Online Service at any time.