To replace the grease in the rear hub of the bicycle, you must not only remove it, but also disassemble it. Few novice cyclists know how to do this. Many do not even know how to remove the rear wheel. Meanwhile, the procedure for disassembling the rear hub in terms of complexity is quite accessible for a beginner cyclist.
It is necessary
- - open-end wrenches or adjustable wrenches;
- - cone wrench and ratchet puller;
- - kerosene, grease, cloth, tweezers.
Instructions
Step 1
Before starting work, remove the rear wheel from the bike and wash it thoroughly. This is necessary not only to make it pleasant to work with, but also to prevent dirt and sand from getting inside the mechanism during disassembly. Place a clean cloth or newspaper on the floor so that the parts to be removed do not stain or get dirty themselves, and so as not to lose them.
Step 2
To remove the rear wheel, turn the bike upside down, placing it firmly on the handlebars and saddle. In doing so, be careful with the equipment mounted on the steering wheel. Speedometer, flashlights, shifters - all this can be easily damaged. If your bike is equipped with hydraulic disc brakes, do all work as quickly as possible. Prolonged exposure of the bike upside down causes air to enter the hydraulic lines. Subsequently, such brakes will have to be pumped. Also, while the bike is without wheels, do not press on the hydraulic brake levers, otherwise it will be difficult to install the wheels.
Step 3
If your bike has caliper brakes (V-Break type), release them before removing the wheel and spread the pads apart. If there is not enough pad solution to remove the wheel, bleed the tires. If the wheels are attached to the fork ends with nuts screwed onto the ends of the axle, take a wrench of a suitable size, loosen the nuts and remove the wheel and axle from their seats. Then remove the chain from the rear sprocket. On sport, racing and mountain bikes, a quick release eccentric clamp can be used. In this case, even a tool is not required to remove the wheel.
Step 4
First remove the ratchet with the cassette. This operation is not necessary to disassemble the bushing, but it will greatly facilitate flushing the right bearing treadmill under the ratchet. To perform this operation, insert the puller into the slots on the inner surface of the ratchet and unscrew it with an open-ended or adjustable wrench. This may require considerable effort. After unscrewing the ratchet, remove it together with the cassette and protective plastic ring.
Step 5
Disassemble the bushing from the left side. Find a locknut and a taper, and on the taper there are two flats for a taper key. This will not be difficult if the bushing has been thoroughly washed beforehand. Then take a flare wrench and a suitable open-end wrench. While holding the cone with a flare wrench, unscrew the lock nut with an open-end wrench. After unscrewing, remove the locknut and washer, put on the axle.
Step 6
Use a cone wrench to unscrew the cone and remove it from the axle. Assess the presence of grease in the bearings and the level of contamination. If there is enough grease and it is not dirty, put the axle back in and adjust the bushing. Otherwise, use tweezers to remove the balls from the body (if they have not yet rolled out by themselves). There should be 9 or 10 of them, depending on the design of the bearing. In some bearing designs, the balls are located in a cage (cage) and can only be removed with this cage.
Step 7
Remove the clip from the right side, in the same place as the axle. Take your time so that the balls do not fall out of the bushing prematurely and do not get confused. Remove any remaining grease from the bushing with a cloth soaked in kerosene. Wash all parts in kerosene and dry on a clean cloth.
