I. Key Points for Lubrication System Inspection
1. Oil Level and Oil Quality Inspection
Check the engine oil level before daily operation. If the oil gauge is below the lower limit, refill immediately to the specified level.
Observe the engine oil condition: If it is black, mixed with metal shavings, or emulsified (contains water), replace it immediately. Normally, it should be transparent amber.
2. Assess the Condition of Lubricated Components
Check the eccentric bearing temperature: If the surface temperature exceeds 80°C after one hour of operation, relubricate.
Hydraulic system pressure fluctuations exceeding 10% may indicate valve spool sticking due to insufficient lubrication.
II. Warning Signals of Abnormal Operation
1 Abnormal Vibration
If the vibration amplitude decreases by more than 20% or irregular pulsation occurs, check the lubrication status of the eccentric block.
If a metallic friction noise is heard during operation (the frequency is consistent with the vibration frequency), it indicates a lack of bearing oil.
2. Changes in Power Performance
If the speed drops by more than 15% at full throttle, this may be due to increased friction in the transmission components, leading to power loss.
A sudden increase in fuel consumption by 20% indicates poor lubrication and increased mechanical resistance.
III. Professional Maintenance Recommendations
1. Lubrication Interval Standards
Normal operation: Relubricate with lithium-based grease (NLGI Grade 2) every 50 operating hours.
High temperature/high humidity environments: Reduce this to 25 operating hours. Use a high-temperature grease (such as Mobilith SHC 220).
2. Lubricant Selection Guidelines
Diesel engines must use CH-4 or higher engine oil. Do not mix with gasoline engine oil.
ISO VG 68 anti-wear hydraulic oil is recommended for vibrator bearings, with a replacement interval no more than 200 hours.
