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Use care to install in the same orientation as they came off. If all parts were removed from axle, install right side parts.For front hubs, the common number is 10 balls of 3/16-inch diameter per side. For rear hubs, the common number is 9 balls of 1/4-inch diameter per side. Place ball bearings in both cups and cover with more grease.For freehub service, see Freehub Service. Freehub bodies are lubricated internally with a light lubricant, and soaking them with solvent will remove lubrication. Wipe freehub mechanism out using damp rag. Work around dust caps when cleaning and inspecting. Dust caps may be fragile and removal may result in damage. For many hub models, it is possible and recommended to overhaul with the pressed dust caps in place.Count the number of bearings on each side, and then use pencil magnet to remove bearings from hub shell.The side with more axle spacers gets more axle thread. Also note axle thread may be asymmetrical. Do not confuse left and right side parts.
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Note that left side and right side cones, washers and locknuts may be different.
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For quick-release hubs, counting the number of threads is an adequate measurement.Ĭount the number of threads past locknut face for a reference of axle protrusion Measure and note the amount of axle protruding past locknut. If it is a solid axle type, remove axle nuts. For rear hubs, begin by removing rear cogs.Parts of a common Shimano® rear hub: (A) Hub shell, (B) Ball Bearings, (C) Axle, (D) Cones, (E) Washers/Spacers, (F) Locknuts, (G) Rubber Seal A typical rear hub with freehub is seen below. It is possible to remove and service the freehub in a separate operation. The hub will have a freehub mechanism attached to the hub. If there is looseness from bearing play, the cone can be move closer to the cup. The locknut is tightened against the cone to prevent the cone from moving. The cup is normally a permanent press fit into the hub shell. Both types can come in either the freehub type or the thread-on freewheel style.Ī basic bearing system is seen below. The cartridge types typically cannot be adjusted for wear or play. The adjustable type bearing surfaces can be adjusted for bearing play. Combination wrenches to fit, or adjustable wrenchīicycle hubs may be either the adjustable cup-and-cone type or the non-adjustable cartridge style.Bench vise and axle vise ( AV-1 or AV-5) to hold wheel secure for easier work.
G falcon bmx hubs series#
Cone wrenches, see DCW and SCW series wrenches - always use the smallest size that fits.