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Tech walkthrough – cable flushing

| Blog, Knowledge, What Mountain Bike | 06/07/2011 11:04am

Justin Loretz shows you seven simple steps to cable flushing

Get set
You need to access the whole length of gear cable so the first step is to make some slack in the gear cable in order to unhitch it from the frame without undoing the cable pinch bolt. Shift the chain to the biggest rear sprocket.

Down shift
Once the cable is at maximum payout in the big sprocket, downshift the shifter all the way to the end, but don’t turn the cranks. Because the derailleur doesn’t move you will end up with a loop of slack inner cable.

Use the slack in the inner wire to jiggle the plastic cable ends from the slotted cable guides, which are fixed to the frame. This will allow you to expose pretty much all the inner cable with a bit of shuffling of the sections of cable outer housing.

Apply lube
Apply a dry lube to the inner cable. Use a clean, dry, lint-free rag, making sure it doesn’t have fibres that will be left on the inner cable, to lessen dirt-trapping potential. If the cable is dirty or rusty, clean it first using the lubed rag.

Run Ragged
Once clean, lube the cable using a clean bit of rag with a generous squirt of fresh lube on it. Slide the rag under sections of inner cable and run the cable through the lube patch. Let the cable soak up the lube for a second or two to ensure a thorough finish.

Grease is the word
In winter or when it’s wet, slip the metal or plastic outer cable ends off and apply some grease inside the cable end. This partly seals off the aperture where the cable passes through, reducing water ingress inside the cable outers.

Run the outer up and down
When you’ve got the inner cable covered in lube, run the sections of outer housing up and down the cable. This helps introduce lube to the inside of the housing. Clip the sections of housing back into place.


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