How to Fix a Bicycle Pump

Written by meg jernigan
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How to Fix a Bicycle Pump
This floor pump has the same parts as a frame or foot pump

Manually operated bicycle pumps are essentially piston and cylinder machines that compress air and force it into the inner tube. Floor pumps, frame pumps and foot pumps all have same primary parts that are prone to failure--the hose and related fittings and the seal at the end of the piston rod, known as the leather.

Skill level:
Moderately Easy

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Things you need

  • Bicycle pump
  • Repair parts
  • Lightweight grease

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  1. 1

    Check for leaks in the hose assembly by holding your finger against the valve fitting at the end of the hose and operating the pump for one or two strokes. If the hose or fittings are bad, air will hiss out at the valve fitting (pump head), the base of the pump, or through the hose itself.

  2. 2

    Replace cracked or broken hoses with a new hose. Hoses must withstand high pressure and patches seldom hold.

  3. 3

    Repair a leaking pump head by unscrewing the nut and replacing the seal. If the head is leaking at the connection to the hose, replace the connector with an adjustable hose clamp.

    How to Fix a Bicycle Pump
  4. 4

    Tighten a leaking fitting at the pump end of the hose where it screws into the base of the pump. If this doesn't fix the problem, remove and replace the connection with a new hose clamp.

    How to Fix a Bicycle Pump
  5. 5

    Fix a faulty leather by removing the rod assembly from the pump barrel. If the leather is split or perforated, replace it. If it appears dry or warped, lubricate it generously with light multipurpose grease or heavy oil.

    How to Fix a Bicycle Pump

Tips and warnings

  • When lubricating a pump, use a light grease or heavy oil. Don't use automotive axle grease.

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