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.

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    • Before you begin, make sure the device is switched off and the engine is cool to the touch.

    • Grab the plastic housing at the end of the spark plug wire.

    • 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.

    • 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.

    • Replace these washers if they look worn.

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    • Use a flathead screwdriver to pry and loosen the mechanical seal from its recess.

    • Remove the mechanical seal.

Conclusion

To reassemble your device, follow these instructions in reverse order.

Arthur Shi

Member since: 03/01/18

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