Crankbrothers Gem Pump - Pump Head Reversal; Prepare for Reversal; Rotate and Reassemble Adapter; Complete Reversal Process

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Step 1: Unthread the valve cap and set aside. Make
sure the lever is in the down position for this
step.
Step 2: Swing the lever outward to push the rubber
gasket and plastic adapter out far enough to
grab them. Remove the gasket and plastic
adapter.
Step 3: Separate the gasket and plastic
adapter then rotate each piece
180º and reassemble.
Presta
Schrader
Step 4: Rotate the lever down into the unlocked position
and insert the gasket and plastic adapter into the
head of the pump with the gasket side facing out.
Step 5: Thread the valve cap back on and secure
firmly by hand.