Pump Maintenance

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  1. The leather pump will need to be periodically checked and lubricated to ensure that it can pressurize the bottle. Turn the shaft of the pump plunger below the swiveling head and pull the plunger out. Lubricate the pump cup with ChapStick © or MSR Pump cup oil. Rotate finger inside the pump cup to expand the diameter. Reassemble.
  2. If the pump does not hold pressure in fuel bottle, clean the check valve assembly. Turn the check valve plug counterclockwise. Remove the check valve ball and spring and wipe with a cloth. Reassemble.
  3. O-rings may crack or tear. If any of the O-rings are cracked, torn, or pitted replace them prior to use.

Note: For additional information on this, the MSR Whisperlite International, or the MSR XGK-EX, contact MSR at www.msrgear.com.