Introduction
Use this guide to drain the oil on a Wacker BS50-4AS REV 101 (2019) Vibrator/Rammer.
This model requires up to 0.7 liters of SAE 10W-40 oil to replace drained oil.
Tools
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Firmly grip the base of the spark plug wire's connector and pull it away from the spark plug to disconnect it.
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Lay the device down horizontally with the oil sight gauge facing down.
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Position a shallow oil drain pan underneath the sight gauge.
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Remove the oil sight gauge.
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Let the oil drain until drips are infrequent.
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Replace and retighten the oil sight gauge.
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Conclusion
To reassemble your device, follow these instructions in reverse order.