I. Abnormal Lubrication System Symptoms
1. Abnormal Oil Pressure
When oil pressure is lower than normal (typically, hydraulic system pressure fluctuations should be less than 10%), it may be due to insufficient oil, a clogged oil line, or oil pump wear.
Excessive oil pressure may be caused by a malfunctioning pressure limiting valve or excessive oil viscosity. Check the oil pump and filter.
2. Deteriorating Lubricant Condition
Oil that appears milky white or contains metal shavings indicates emulsification or bearing wear.
Loss in oil viscosity (such as thinning at high temperatures) can cause the oil film to rupture, increasing component wear.
II. Abnormal Equipment Operational Signs
1. Vibration and Noise
Abnormal metal friction noise at the eccentric bearing indicates dry grinding due to insufficient lubrication.
A decrease in vibration amplitude by more than 20% or pulsation indicates bearing lubrication.
2. Abnormal Temperature
Axis If the operating temperature of a bearing exceeds 80°C (normally below 70°C), frictional heat accumulation may occur due to lubrication failure.
III. Key Points for Lubrication System Inspection
1. Oil Line Patency Test
Use the grease fitting to test for blockage (e.g., inability to inject grease or abnormal oil backflow).
Check the oil pipes and filters for deposits (oil cleanliness can be assessed by monitoring metal particles).
2. Lubrication Cycle and Amount
Replenish grease every 50 operating hours (reduced to 25 hours in high-temperature environments). Insufficient grease can lead to bearing lubrication failure.
When the hydraulic tank oil level falls below 80% of the mark, refill oil promptly to prevent the oil pump from draining.
IV. Professional Diagnostic Recommendations
1. Use online monitoring equipment to track oil temperature, pressure, viscosity, and other indicators in real time to provide early warning of lubrication failures.
