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This guide shows how to remove and replace the mechanical seal for the Wacker Pump PT3A 2012.
Note: There are several versions of this device, and each uses a different mechanical seal design that’s incompatible with the others. Contact Wacker Neuson with the device serial number, and they will confirm which mechanical seal you need for the device.
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Grab the plastic housing at the end of the spark plug wire.
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Pull firmly to disconnect the wire from the spark plug.
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Use the included wrench to loosen the four black knobs securing the pump housing cover.
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If the wrench is missing, slide a screwdriver shank through the knob and twist to loosen the knobs.
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Slide the pump housing cover out of the pump and remove it.
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Use a 10 mm socket and wrench to remove the three bolts securing the recoil starter.
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Remove the recoil starter from the engine.
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Slide a large screwdriver through the slots in the starter cap and brace the screwdriver with a wooden block to prevent the driveline from turning clockwise.
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Use a 19 mm socket, extension, and wrench to loosen the impeller from the driveline.
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Remove the impeller from the driveline.
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Remove the two washers from the driveline.
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Use a flathead screwdriver to pry and loosen the mechanical seal from its recess.
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Remove the mechanical seal.
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.
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what seal goes between pump and motor?
