Introduction
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.
What you need
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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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Use a 10 mm socket and wrench to remove the three bolts securing the recoil starter.
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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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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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