When I came back from a mountain sprint, the frame would produce abnormal noises of "creaking" and "creaking" every time I stepped on it. After using the elimination method, it was determined that the abnormal noise originated from the bottom turning point, so I said nothing Immediately get home to prescribe the right medicine, and have a big health care with the frame pivot bearing.
The soft tail frame brings an unparalleled performance experience off-road, especially when passing through some complex and rough terrain, that feeling is unmatched by the hard tail. However, no matter how good the machine is, it needs maintenance before it can exert its maximum power. The same is true for the pivot point of the soft tail frame.
Preparation tools:
Bearing Puller
Bearing static press-in tool
wrench
inner hexagon
bearing grease
After pulling out the bearing, carefully check whether there are metal debris, burrs and other residues around the inner wall of the pivot point
Use a sharp object to carefully remove the dust seal of the bearing, and turn the bearing by hand to check whether there is any jamming or pitting. If there is no congratulations, the bearing can continue to be used after maintenance. If there is jamming or pitting, it must be replaced to avoid damage. its performance.
Use a sharp object to carefully remove the dust seal of the bearing, and turn the bearing by hand to check whether there is any jamming or pitting. If there is no congratulations, the bearing can continue to be used after maintenance. If there is jamming or pitting, it must be replaced to avoid damage. its performance.
Use a sharp object to carefully remove the dust seal of the bearing, and turn the bearing by hand to check whether there is any jamming or pitting. If there is no congratulations, the bearing can continue to be used after maintenance. If there is jamming or pitting, it must be replaced to avoid damage. its performance.
Therefore, the removed bearings are directly thrown into the ultrasonic cleaning machine and waited with metal detergent.
If you don’t have an ultrasonic cleaner at home, you can use a toothbrush and washing powder for cleaning. Just clean the old grease inside the bearing.
Rinse the bearings with clean water
After cleaning the bearings, use a hair dryer to dry the moisture inside them thoroughly, so as not to cause the bearings to rust due to moisture
The lithium-based grease with NLGI2 viscosity is used here, which has strong oxidation resistance and water resistance, and is suitable for lubricating bearings and gear parts.
Use a toothpick to pick up a little grease and spread it on the ball of the bearing. You don’t need to apply too much thin layer to fill the gap, then cover one side with dust seal, turn the bearing to make the grease fully cover the surface of the ball, and do the same on the other side .
Before pressing into the bearing, apply a layer of grease on the inner wall to lubricate and prevent the bearing from abnormal noise, and prepare for the next step of pressing into the bearing
Static press-in gaskets of different sizes
The static press-in tool of ENDURO is used here. It has various sizes of static press-in gaskets suitable for parts in different parts.
Choose the diameter suitable for your own bearing and statically press in the gasket, pad the gasket at both ends, then slowly twist the tool, press the bearing back to its original position with static force and put it back on the connecting rod, and fix the fixing screw with 6NM torque.
After this maintenance, the frame rotation point returned to normal and the abnormal noise disappeared, and the rotation point response was much more sensitive. You can run wildly in the mountains with your car again on weekends. I hope that all riders can enjoy the process of maintaining the parts by themselves and experience the fun in the process.