Floor Pump O-Rings Replacement
iRobot and one other contributor
Last updated on Feb 16, 2015
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Introduction
Go to step 1 ↓You may notice that your pump is not able to achieve the pressures it used to be able to. Your pump may be even making unusual sounds while pumping. This could be an indication that the O-rings in the pump are worn and can't make a proper seal. Use this guide to replace your worn O-rings.
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Hold the base of the pump steady and twist the barrel counter-clockwise by hand until it completely unthreads.
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Lift the barrel off the base.
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Place the ends of needle nose pliers into the top cap holes and turn counter-clockwise until the cap is loose.
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Finish removing the top cap by hand.
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Pull the pump plunger out of the barrel.
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Use a small flathead screwdriver to remove the plunger O-ring.
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Use the screwdriver to remove the upper bump stop O-ring.
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Install new O-rings.
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Remove the lower bump stop O-ring from the pump base.
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Remove and replace the base O-ring.
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Insert the tips of needle nose pliers into the base cap holes and turn it counter-clockwise until it completely unthreads.
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Remove the base cap from the pump base.
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Remove and replace the base cap O-ring.
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Re-assemble the pump using these instructions backwards.
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