The lubricating oil filling amount and maintenance points for the three leaf Roots blower are as follows:
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**1、 Lubricating oil filling standard**
1. * * Gearbox oil quantity**
-Oil level requirement: * * 1/2~2/3 * * at the centerline position of the oil sight glass (sight glass) (as shown in the figure).
-* * Reference oil quantity * * (common models):
|* * Fan power * * | * * Fuel quantity (liters) * *|
|--------------|-----------------|
| ≤15kW | 0.5～1.5 |
| 15～55kW | 1.5～3.0 |
| ≥75kW | 3.0～6.0 |
2. * * Bearing grease * * (if grease lubrication type)
-Filling amount each time: Fill 1/3 to 1/2 of the bearing chamber (excessive filling can cause heating).
-Recommended cycle: Supplement every 500 hours of operation.
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**2、 Lubricant selection criteria**
|* * Lubricating parts * * | * * Recommended oil * * | * * ISO viscosity grade * * | * * Replacement cycle * *|
|--------------|--------------------------|----------------|--------------------|
|Gearbox | Medium load gear oil (such as L-CKC220) | ISO VG 220 | First 200 hours, followed by 6 months or 2000 hours|
|Bearing (oil lubrication) | Same gearbox oil | - | Synchronous replacement|
|Bearings (grease lubrication) | Lithium based grease (such as NLGI 2) | - | Supplement every 3-6 months|
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**3、 Refueling steps**
1. * * Shutdown cooling * *: After operation, let it stand for 15 minutes to prevent high-temperature oil splashing.
2. * * Clean the oil port * *: Use non-woven fabric to clean the dirt around the oil port.
3. * * Quantitative addition * *:
-Gearbox: Slowly add oil to the centerline of the oil window through an oil pump or funnel.
-Bearing: Use a grease gun to evenly inject (grease lubricated type).
4. * * Operation detection * *:
-Run without load for 5 minutes and check if the oil level has decreased (the oil suction of the new engine bearing may cause a slight drop in the oil level).
-Observe for oil leakage.
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**4、 Precautions**
1. * * Mixing oil is strictly prohibited * *: Mixing different brands/models of lubricating oil can cause chemical reactions, leading to lubrication failure.
2. Oil quality monitoring:
-If the oil turns black, emulsified, or contains metal shavings, it needs to be replaced immediately.
3. * * Environmental adaptation * *:
-Choose higher viscosity oil (such as ISO VG 320) for high temperature environments (>40 ℃).
-Select low pour point oil (such as L-CKD 150) for low-temperature environments (<0 ℃).
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**5、 Frequently Asked Questions**
-Q: Does the noise increase after refueling**
→ It may be due to excessive oil volume (increased gear stirring resistance) or mismatched oil viscosity.
-Q: Can't you see the oil level clearly through the oil window**
After stopping the machine, wipe the oil window or tilt the fan to allow the oil to flow back before observing.
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**Attachment: Oil Level Diagram (Example)**
```
[Oil window]
┌───────┐
│★★★★★│← Ideal oil level (centerline)
│ │
└───────┘
```
Adding oil according to standards can extend the life of gears and bearings! Please refer to the equipment manual for the specific fuel quantity.
