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The hub is the walking parts of the car. Bearing fruit wheel hub failure, especially the front wheel is more obvious, it may cause noise. Fever phenomenon, easily lead to the square tapered roller bearings to the risk of runaway phenomenon. The hub bears a reduce frictional resistance when the chassis operation, the maintain normal driving important task of Bearing Factory. Therefore, TIMKEN bearings must be scheduled for maintenance.
The checking of the hub
Check TIMKEN bearing the tightness of, first of all the car inspected wheel hub end of the wheel axle set up with the support vehicle stool cover car wooden model query appliances, the frame of the car safely.
For a small car, check the wheels, with both hands on linear motion bearings in the lower side of the tire, the hands tire flip back and forth, repeat several times. If you swing apparent Songkuang the feeling should be overhauled wheel hub. Such as deep groove ball bearing fruit, should not feeling of Songkuang and block.
Hand turn the wheel a few laps subjects, look smooth the bearing rotation LNSERTED whether whether there is abnormal noise. The irregularities should be overhauled the hub. No bearing noise, rotation is not smooth and ebbed and flowed, not normal. If the rotation is not smooth and friction sound, and said self-aligning roller bearings that partially normal braking.
The checking of the brake. Usually check wheels, if the inside of the tire types are traces of oil, should be promptly identify the cause is likely to be the brake cylinder or brake lines caused by the oil spill, with the the Luoyang Bearing brakes, check the wheel be excluded.
Maintenance of the hub
Remove the thrust ball bearing wheels with special tools.
Apply grease to the cavity should pay attention to, the grease should be squeezed into within until the grease from the other TIMKEN Bearing Factory side came out. Note that the hub cavity grease and wipe not out too much, otherwise it will affect the cooling and braking. Harbin Bearing Factory hub cavity and the shaft head cover Apply a thin layer of grease, so that play a role in anti-rust.
Remove the wheel TIMKEN bearing hub axle head decorative cover dust cover.
After all parts are in line with the requirements, the inner bearing Apply lubricating thrust roller bearing grease put people hub.
Followed by installation of locking tabs. Fixing nut tire covered with dust cover and decorative cylindrical roller bearings and other parts.
Wheels adjusted travel for a distance (10km, adjusted too tight special bearings caused the fever, the temperature for the swab touched wheels, re-adjust the stop checks, appropriate to relax the tightness.
Remove the the tire nut and tires, pay attention not to damage the tires bolt threads. Remove the brake disc brakes, bearings, no longer be used pliers to remove the lock ring or locking pin.
Hub and outer bearing mounted back on the journal axis head adjustment nut, and then the shaft head wrench torque as adjusting nut by hand. Tighten the nut, cylindrical roller bearings turning left and right wheels a few times, to see the installation. The bearing tightness appropriate wheels to rotate freely and not feel the axial turntable bearing clearance. On the other hand, by rotating the bearing seat to fit correctly.
Before demolition wheels good TIMKEN bearing wheels maintenance should be done preparatory work, parked the car and set up the axle, to ensure the safety of maintenance operations.
Check the wheels and seat, crack fatigue spalling and roller loose phenomenon, should be replaced. TIMKEN bearings pitting seat should also be replaced.
Check the inside diameter of the journal cope with the situation, with the gap should be less than 0.10mm measurement journal should be perpendicular to the ground, the upper and lower parts (where the greatest wear parts. Measurement is not allowed to play in the journal glitches. Ma points to narrow the gap with the clearance exceeds the specified limit, replace the one-way bearing, so as to restore normal with the gap.
Scrape off the old grease the journal and wheels cavity, cleaning linear bearings agent to clean the wheels and the journal and dry with a cloth, and finally wipe with a cloth wheel hub cavity.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 33215U NTN | 75 | 130 | 41 |
| 32215U NTN | 75 | 130 | 31 |