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Replacing the Reservoir Membrane of a Sterwins Booster Pump (900W, 19L, 3800L/h)

What you need

  1. Replacing the Reservoir Membrane of a Sterwins Booster Pump (900W,  19L, 3800L/h), Tools Needed: step 1, image 1 of 3 Replacing the Reservoir Membrane of a Sterwins Booster Pump (900W,  19L, 3800L/h), Tools Needed: step 1, image 2 of 3 Replacing the Reservoir Membrane of a Sterwins Booster Pump (900W,  19L, 3800L/h), Tools Needed: step 1, image 3 of 3
    • Before fiddling with the booster pump, verify that it is not plugged in.

    • Tools Needed:

    • Flathead screwdriver

    • Flat wrench (size 14mm and 12mm)

    • L-shaped socket wrench (size 14mm)

    • Flat wrench (size 28mm) or an adjustable wrench

  2. Replacing the Reservoir Membrane of a Sterwins Booster Pump (900W,  19L, 3800L/h), Depressurize the reservoir: step 2, image 1 of 3 Replacing the Reservoir Membrane of a Sterwins Booster Pump (900W,  19L, 3800L/h), Depressurize the reservoir: step 2, image 2 of 3 Replacing the Reservoir Membrane of a Sterwins Booster Pump (900W,  19L, 3800L/h), Depressurize the reservoir: step 2, image 3 of 3
    • Unscrew the cap covering the valve that regulates the internal pressure of the reservoir.

    • Using the screwdriver, push on the valve core to depressurize the reservoir.

  3. Replacing the Reservoir Membrane of a Sterwins Booster Pump (900W,  19L, 3800L/h), Unscrew the seal plate: step 3, image 1 of 3 Replacing the Reservoir Membrane of a Sterwins Booster Pump (900W,  19L, 3800L/h), Unscrew the seal plate: step 3, image 2 of 3 Replacing the Reservoir Membrane of a Sterwins Booster Pump (900W,  19L, 3800L/h), Unscrew the seal plate: step 3, image 3 of 3
    • Using a flat wrench (size 14mm) and a socket wrench (size 14mm), unscrew the 6 bolts holding the seal plate in place.

  4. Replacing the Reservoir Membrane of a Sterwins Booster Pump (900W,  19L, 3800L/h), Remove the seal plate: step 4, image 1 of 2 Replacing the Reservoir Membrane of a Sterwins Booster Pump (900W,  19L, 3800L/h), Remove the seal plate: step 4, image 2 of 2
    • Unscrew the connection between the head of the pump and the tank with a flat wrench (size 28mm or adjustable)

  5. Replacing the Reservoir Membrane of a Sterwins Booster Pump (900W,  19L, 3800L/h), Remove the reservoir: step 5, image 1 of 3 Replacing the Reservoir Membrane of a Sterwins Booster Pump (900W,  19L, 3800L/h), Remove the reservoir: step 5, image 2 of 3 Replacing the Reservoir Membrane of a Sterwins Booster Pump (900W,  19L, 3800L/h), Remove the reservoir: step 5, image 3 of 3
    • Unscrew the valve nut with a flat wrench (size 12mm).

    • Position the tank upright at 90° to remove the reservoir.

  6. Replacing the Reservoir Membrane of a Sterwins Booster Pump (900W,  19L, 3800L/h), Replace the reservoir: step 6, image 1 of 3 Replacing the Reservoir Membrane of a Sterwins Booster Pump (900W,  19L, 3800L/h), Replace the reservoir: step 6, image 2 of 3 Replacing the Reservoir Membrane of a Sterwins Booster Pump (900W,  19L, 3800L/h), Replace the reservoir: step 6, image 3 of 3
    • Put the valve back into the fastening tab of the reservoir.

    • Locate the valve's original spot in the bottom of the tank.

    • Insert the reservoir into the tank.

  7. Replacing the Reservoir Membrane of a Sterwins Booster Pump (900W,  19L, 3800L/h), Set the reservoir in place: step 7, image 1 of 3 Replacing the Reservoir Membrane of a Sterwins Booster Pump (900W,  19L, 3800L/h), Set the reservoir in place: step 7, image 2 of 3 Replacing the Reservoir Membrane of a Sterwins Booster Pump (900W,  19L, 3800L/h), Set the reservoir in place: step 7, image 3 of 3
    • With your hands, put the valve back in its spot inside the tank.

    • With a flat wrench (size 12mm), put the nut holding the valve back in place.

    • Position the lip of the reservoir on the outside rim of the tank.

  8. Replacing the Reservoir Membrane of a Sterwins Booster Pump (900W,  19L, 3800L/h), Put the seal plate back on: step 8, image 1 of 3 Replacing the Reservoir Membrane of a Sterwins Booster Pump (900W,  19L, 3800L/h), Put the seal plate back on: step 8, image 2 of 3 Replacing the Reservoir Membrane of a Sterwins Booster Pump (900W,  19L, 3800L/h), Put the seal plate back on: step 8, image 3 of 3
    • Reposition the seal plate on the tank.

    • Screw the 6 bolts back into place with a flat wrench (size 14mm) and a socket wrench (size 14mm).

    • Screw the nut between the head of the pump and the tank back into place, with a flat wrench (size 28 mm or adjustable).

    • Repressurize the tank to 1.8 bar max

Finish Line

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iRobot

Member since: 09/24/09

1 Reputation

636 Guides authored

2 Comments

Thank you so much for your tutorial. I am a window cleaner and it is a essential for me. After my pump broke last week I was planning on buying a new one but now its fixed because of you.

Neil Glass - Reply

Where can I buy the membrane?

Periklis Tsogkas - Reply

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