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Step 3Procedure 2 - Inner tube and final assembly
1) Choose a bicycle inner tube. Its diameter should be large enough to stretch over the funnel section, yet small enough to fit snugly over the end of the bellows pump's original air hose.
2) Cut a section of the inner tube. Avoid patches. Its length should be about 4 times the length of the funnel section.
3) Insert the tube into the funnel section.
4) Stretch the tube over the funnel section, starting from the small end. Lubricate with water as needed.
5) Secure the inner tube to the funnel section. Twist two turns of copper wire over the tube and funnel. Optional: ensure the wire drops into the narrow slot in the funnel section.
6) Stretch the other end of the inner tube over the bellows pump air hose.
7) Secure the inner tube to the original air hose. Twist two turns of copper wire over the tube and hose.
8) Optional: Cover the copper wire with black shrink wrap tubing or electrical tape if desired.
2) Cut a section of the inner tube. Avoid patches. Its length should be about 4 times the length of the funnel section.
3) Insert the tube into the funnel section.
4) Stretch the tube over the funnel section, starting from the small end. Lubricate with water as needed.
5) Secure the inner tube to the funnel section. Twist two turns of copper wire over the tube and funnel. Optional: ensure the wire drops into the narrow slot in the funnel section.
6) Stretch the other end of the inner tube over the bellows pump air hose.
7) Secure the inner tube to the original air hose. Twist two turns of copper wire over the tube and hose.
8) Optional: Cover the copper wire with black shrink wrap tubing or electrical tape if desired.
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