Lubrication System Maintenance Tips
A centralized lubrication system is designed to reduce maintenance work — but the system itself needs periodic attention to perform reliably. Neglecting the system leads to under-lubrication, blocked lines, pump failures, and ultimately costly machine breakdowns. Here are the essential maintenance tasks every maintenance engineer should follow.
Daily Checks
- Check reservoir level — Inspect the oil or grease level via the sight glass or level gauge. Top up before the low-level alarm triggers.
- Observe pump operation — Listen for unusual sounds. Confirm the pump cycles at the correct interval.
- Check for visible leaks — Inspect tubing connections and fittings for leaks. Even small leaks cause under-lubrication downstream.
- Verify alarm indicators — Confirm no pressure or level alarms are active.
Weekly Checks
- Inspect tubing and fittings — Look for kinked, cracked, or loose tubing, especially near moving machine parts.
- Check pressure gauge reading — Compare to baseline. A drop in pressure may indicate a blocked distributor; a rise may indicate a blocked line downstream.
- Lubrication point inspection — Spot-check a few lubrication points to confirm lubricant is being delivered.
Monthly Checks
- Clean or replace in-line filter — A clogged filter restricts flow and starves the system. Replace filter elements as per manufacturer recommendation or at signs of pressure drop.
- Test pressure switch — Manually trigger the pump and confirm the pressure switch activates and deactivates correctly.
- Check suction strainer — Remove and clean the suction strainer at the pump inlet to ensure unrestricted flow.
- Inspect relief valve — Confirm the relief valve is not stuck open or closed.
Annual Maintenance
- Drain and flush the reservoir — Remove all old oil, clean the tank interior, and refill with fresh lubricant of the correct grade.
- Inspect pump internals — Check pump gears or plungers for wear. Replace seals if needed.
- Recalibrate metering devices — Verify metering cartridges or dose feeders are delivering the correct volume.
- Inspect all tubing — Replace any tubing showing signs of cracking, brittleness, or corrosion.
- Test electronic controller — Verify timer settings and test all alarm outputs.
Common Problems and Solutions
| Problem | Likely Cause | Solution |
|---|---|---|
| Low pressure alarm | Blocked line, failed pump, empty reservoir | Check reservoir level, inspect lines, test pump |
| High pressure alarm | Blocked distributor or metering device | Locate and clear blockage, replace metering cartridge |
| Pump not cycling | Controller fault, power supply issue | Check timer settings, inspect power supply and wiring |
| Leaking fittings | Loose connections, worn seals | Tighten or replace fittings |
| Bearing running hot | Insufficient lubrication delivery | Increase pump cycle frequency or metering volume |
For replacement parts — filters, metering cartridges, pressure switches, sight glasses, or pumps — SP Engineers stocks a full range of lubrication system spares. Contact us for availability and pricing.