Introduction

This guide will show you how to remove a punctured tube and replace it.

Read through the Free Wheelchair Mission GEN 1 Tools guide guide to familiarize yourself with all the tools necessary.

Unscrew the axle bolt Using the Free Wheelchair Mission Custom Multi-Purpose Tool on the bolt head and a 19mm crescent wrench on the nut. Remove the wheel and set it aside. You can also use a 19mm socket instead of the multitool.
  • Unscrew the axle bolt Using the Free Wheelchair Mission Custom Multi-Purpose Tool on the bolt head and a 19mm crescent wrench on the nut.

  • Remove the wheel and set it aside.

    • You can also use a 19mm socket instead of the multitool.

Unscrew the cap of the tube stem and set it aside. Unscrew the cap of the tube stem and set it aside.
  • Unscrew the cap of the tube stem and set it aside.

Release any air that remains by pressing down on the piston in the head of the stem. Release any air that remains by pressing down on the piston in the head of the stem.
  • Release any air that remains by pressing down on the piston in the head of the stem.

Take a tire lever and fit it under the edge of the tire. Pop the edge of the tire out of the rim of the wheel by pushing down on the lever. Clip the opposite end of the lever onto the closest spoke.
  • Take a tire lever and fit it under the edge of the tire.

  • Pop the edge of the tire out of the rim of the wheel by pushing down on the lever.

  • Clip the opposite end of the lever onto the closest spoke.

Take another tire lever and repeat step 4 roughly 2.5 inches away from where you are holding the other tire lever.
  • Take another tire lever and repeat step 4 roughly 2.5 inches away from where you are holding the other tire lever.

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Holding one tire lever in place, slide the other lever around the rest of the wheel until the side of the tire is completely free of the rim.
  • Holding one tire lever in place, slide the other lever around the rest of the wheel until the side of the tire is completely free of the rim.

Push the stem of the tube back through the hole in the rim it comes out of. Reach under the tire and pull the tube out.
  • Push the stem of the tube back through the hole in the rim it comes out of.

  • Reach under the tire and pull the tube out.

Unfold the new tube and unscrew the cap of the stem. Set the cap aside someplace safe. You will need to put it back on later.
  • Unfold the new tube and unscrew the cap of the stem.

    • Set the cap aside someplace safe. You will need to put it back on later.

Fit the stem of the tube firmly into the hole in the pump that comes on the frame. Lift the lever on the head of the pump up.
  • Fit the stem of the tube firmly into the hole in the pump that comes on the frame.

  • Lift the lever on the head of the pump up.

Pull the handle of the piston at the bottom of the pump out. Pump a small amount of air into the tube so that it holds its basic shape. To pump air into the tube pull the piston out then push it back in.
  • Pull the handle of the piston at the bottom of the pump out.

  • Pump a small amount of air into the tube so that it holds its basic shape.

    • To pump air into the tube pull the piston out then push it back in.

Push the stem of the tube through the hole in the rim so that the head is on the outside. Push the rest of the tube under the tire so it sits evenly on the rim.
  • Push the stem of the tube through the hole in the rim so that the head is on the outside.

  • Push the rest of the tube under the tire so it sits evenly on the rim.

Push the tire back onto the rim working your hands around the wheel. Pump air into the tube until the tire is firm and can support you weight.
  • Push the tire back onto the rim working your hands around the wheel.

  • Pump air into the tube until the tire is firm and can support you weight.

  • Screw the cap back onto the head of the tube stem.

  • If you have a pressure gauge it should read around 40 psi.

Put the wheel back on the axle and screw in the bolt using the multitool or 19mm socket and 19mm crescent wrench. Make sure the handle faces out.
  • Put the wheel back on the axle and screw in the bolt using the multitool or 19mm socket and 19mm crescent wrench.

    • Make sure the handle faces out.

Finish Line

Andrew Blocher

Member since: 04/19/2013

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Cal Poly, Team 14-7, Maness Spring 2013 Member of Cal Poly, Team 14-7, Maness Spring 2013

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