front wheel bearings
front wheel bearings
Author :Admin | Publish Date:2013-06-19 11:46:55
The wheel bearings sit between a cone screwed to the wheel axle and the cup
in the wheel hub. They must be properly adjusted and greased. To find out if
they need greasing without taking everything apart, simply remove the wheel from
the bike, support the axle horizontally with your fingers, and turn the wheel
slowly--try not to tilt the axle as it rotates. If the wheel does not turn
smoothly or you can feel tiny bumps in your fingers, then you must dismantle the bearing assembly and service the bearings.
Front wheel bearings should last for years and provide you with thousands
of miles of travel---but they won't last forever. In some cases they even fail
completely if they haven't been maintained correctly. Part of a maintenance
schedule should include replacement of wheel bearings before they fail. The
procedure isn't that difficult if you have about an hour and a few small tools.
Front and back wheels are similar in procedure to change skf bearings and only require slightly different
tooling.
Remove the wheel from the bike. If you are doing the back wheel, remove the
gear cassette freewheel first by turning it counterclockwise. If it's too tight,
apply the freewheel puller. Hook it on, loosen the freewheel and lift it
off.
Lay the wheel on its right side, and work on the left side of the wheel.
Take a screwdriver and pry off the rubber seal. Slide a 15 mm cone wrench onto
the cone flats on the bottom for the back wheel, a 13 mm wrench for the front.
Now place the 17mm open-end wrench on the nut on top and loosen it by turning it
counterclockwise against the cone wrench.
Stand up the wheel. Using both hands from both sides, unscrew the locknut,
cone and spacers. Now slide out the axle from the right side. Using a small
magnet, remove all the iko bearings from both
sides and count them. Clean off all the old grease.
Liberally apply new grease to the inside of the hub where the bearings ride
on both sides and to the cone that you just took out. Now carefully push the new
ball bearingsdown into the grease one at a time---the front hub using 3/16-inch
bearings, and the rear hub using 1/4-inch bearings. Now cover all the bearings
with grease on both sides, letting the grease hold them in place. Grease the
axle and slide it back in the hub.
Slide the left side washers, spacers and cone on first, then the right, and
tighten everything finger tight. Lay the [front wheel
bearings] back down on its right side, slide the cone-wrench on, then slide
the 17 mm open-end wrench back on and tighten clockwise. Reinstall the rubber
seal, and put the wheel back on the bike.
BRING SKF ALS 40
BRING SKF ALS 48
BRING SKF AMS 8 (1 X 2 1/2 X 3/4)
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