How To Remove Bicycle Crank Bearings?

A bicycle crank structure, it is in the crank end of ontology relative two aspects, respectively, set up a set of hole and a screw hole, the hole in the drive shaft, package and cooperate with the external thread type nut locking in the screw hole, crank ontology in the other end is equipped with a screw hole, make its can lock GuJiao pedals, and in the crank body external coating with plastic material,

Its characteristics lie in:  The crank body is formed by an integral stamping section is U shape, and it has a big hole and a small hole at both ends respectively, and is provided with a sleeve, a nut and a plate, the corresponding two sides of the sleeve are respectively provided with a set of holes and a screw hole, so that the sleeve sleeve into the crank body after the hole hole to be welded,  The nut is set at the other end into the crank ontology small holes shall be welded after fixation, the plate is formed corresponding crank u-shaped slot shapes of ontology, and in the other side has a side plate, the distance between the two sides of the lateral is slightly larger than the crank body two side, on which the two sides can be forced into crank this make plate after covering the crank ontology,  The sleeve and nut are externally coated with plastic material.

The crank is a bicycle accessory, and a loose crank often makes a snapping sound. To check for crank problems, first turn the crank to a horizontal position, press both sides of the crank down with force, and then turn the crank 180 degrees, repeat the same action. If the crank wobbles, tighten the crank retaining bolts. The crank of a new bicycle should be checked frequently.

The disassembly steps are as follows:

Step 1: First remove the crank cover on the left side of the bicycle axle with an inner hexagon wrench, and then remove the crank on the left side with a wrench.

Step 2: after the crank is removed, we remove the chain by hand, hang it on the five-way, and push out the tooth tray with the palm.

The third step: after the tooth tray is put away, the central shaft is removed with the central shaft wrench. There are several gaskets on the central shaft. At the 

same time, the central shaft is engraved with an arrow and rotates in the direction of the arrow.

The fourth step:Use a knife to slowly remove the dust from the mountain bike's center axle to reveal the bearings, and the bike is disassembled.  

A loose crank often makes a snapping sound. To check for crank problems, first turn the crank to a horizontal position, press both sides of the crank down

 with force, and then turn the crank 180 degrees, repeat the same action. If the crank wobbles, tighten the crank retaining bolts. The crank of a new bicycle should be checked frequently.