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Use this guide to remove or replace the bellows 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.
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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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Use a 1-1/16 inch socket to break loose the oil sight gauge near the bottom of the device.
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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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Flip the device onto the work surface such that the motor and handles face up.
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Place two separate blocks of wood underneath the seam between the leg assembly and crankcase.
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Use an 8 mm hex key socket to remove the four bolts securing the leg's guiding cylinder to the crankcase.
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Pull the leg assembly away from the rest of the device.
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Continue to separate the two halves by compressing the bellows until the nylon plug covering the piston pin is visible.
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Use an appropriately-sized punch and a ball-peen hammer to tap the pin out of its hole on the guide piston until it is no longer securing the connecting rod.
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Remove the leg assembly from the crankcase.
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Use a punch and hammer to tap the pin out of the guide piston.
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Use a 13 mm socket or large flathead screwdriver to loosen the two hose clamp bolts securing the bellows to the leg assembly.
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Lower the bottom hose clamp away from the bellows and let it rest at the base of the leg assembly.
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Open the top hose clamp and pull it down, past the bellows, and let it rest at the base of the leg assembly.
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Use a rubber mallet to tap the bellows down and off of the top of the guide cylinder.
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Once loose, pull the bellows off of the lip on the guide cylinder.
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Lift up and remove the guide cylinder.
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Use a rubber mallet to tap the bellows up and off of the top of the protective pipe.
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Once loose, pull the bellows off of the lip on the protective pipe.
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Remove the bellows.
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To reassemble your device, follow these instructions in reverse order.
After reassembly, tilt the device upright and check the oil level through the sight glass. The oil should cover 1/2 to 3/4 of the sight glass to be considered full. This model requires up to 0.7 liters of SAE 10W-40 oil.
To reassemble your device, follow these instructions in reverse order.
After reassembly, tilt the device upright and check the oil level through the sight glass. The oil should cover 1/2 to 3/4 of the sight glass to be considered full. This model requires up to 0.7 liters of SAE 10W-40 oil.
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