Shimano makes bicycle components. Part of the component group includes the shifters, also known as shifter pods. There are a range of Shimano shifters, including Deore LX, XT and XTR. Repairing any of the shifters entails cracking open the pod housing and adjusting or replacing cables or bearings. Adjusting the barrels also can get your Shimano shifters back to proper working order, negating the need to open the pods.
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Things you need
- Bicycle grease
- Allen keys
- Needle-nose pliers
Locate the barrel adjuster on the shifter pod. The barrel adjuster is found on the side of the shifter facing the stem of the bicycle. Turn the barrel one quarter turn and then ride the bicycle and shift gears with the Shimano shifter. Continue to turn one quarter turn at a time until the shifter gives the proper shift when triggered.
Turn the bracket mount screw under the shifter to the left with a 5mm Allen key. Turn to the left until the pod housing opens and you have two pieces of black pod housing plastic. Set the top of the shifter to the side.
Inspect the stainless steel ball bearings that are housed in a flat metal cylinder. Look for debris or grit in the grease the bearings are packed in. If the grease is contaminated or if the ball bearings are eroded and uneven, you need to change the bearing cartridge. Remove the damaged bearing cartridge.
Slide the replacement ball bearing cartridge into the housing where the old one was removed. Place the shifter housing top back onto the shifter pod.
Tighten down the shifter pod by turning the Allen screws to the right using the 5mm Allen key. Take a test ride on the bike and shift through the gears with the shifter to break in the bearings.
Grab the cable coming out from the shifter pod with the needle-nose pliers and apply a thin coating of grease along the metal on the cable and then let it retract into the housing.
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