During the installation process of the car wheel hub unit, in order to ensure safety, the following matters should be focused on:
1. Preparation stage before installation
Cleaning and inspection:
Thoroughly clean the wheel hub, installation site, and tools, remove dust, oil stains, and rust, and prevent impurities from entering the bearing interior.
Check whether the wheel hub, bearings, bolts and other components are intact, without cracks, deformation or wear, to ensure size matching.
. Confirm that the vehicle is parked on a flat and solid surface, tighten the handbrake, and use warning signs if necessary.Tools and equipment:
Use specialized tools (such as torque wrenches, presses, dynamic balancing machines, etc.) to avoid improper installation caused by the use of general tools.
.Check the status of the equipment to ensure its proper functioning and avoid safety accidents caused by equipment failures.
.Personal protection:
Wear a safety helmet, protective goggles, dust mask, and cut resistant gloves to prevent head, eye, respiratory, and hand injuries.
.II. Installation Operation Stage
Avoid direct tapping or falling:
It is strictly prohibited to use a hammer to directly tap the bearing or wheel hub to avoid damaging the components or causing displacement of the components.
.Prevent the wheel hub or bearing from falling, avoid damage such as inner ring detachment and seal component detachment.
.Proper installation of bearings:
Follow the principle of "pressure not transmitted to the steel ball" to prevent the steel ball from producing indentation and early failure.
. For bearings equipped with magnetic encoders or ABS magnetic thrust rings, they should be kept away from the magnetic field before installation to prevent magnetic failure.During installation, ensure that the bearing direction is correct, especially for bearings with ABS magnetic thrust rings. The side with the magnetic thrust ring should be pointed inward, facing the ABS sensitive component.
.Use appropriate torque and sequence:
Use a torque wrench to evenly tighten the bolts in diagonal order multiple times, ensuring that the wheel hub is evenly stressed.
. The torque size should be adjusted according to the vehicle model and manufacturer's regulations to avoid excessive damage to components or insufficient looseness.Dynamic balance test:
After installation, conduct a dynamic balance test to ensure that the tire hub combination is balanced and avoid vibration or shaking during high-speed driving.
. Add appropriate balance weights based on the test results until the balance value returns to zero.III. Post installation inspection stage
Comprehensive inspection:
Check whether the wheel hub bolts are tightened, whether the tire pressure is normal, and whether there is any abnormal swing or noise when the wheel hub rotates.
.Confirm that there is no interference between the tires and the braking system, suspension system, or other parts of the chassis.
.Trial operation and re inspection:
After driving for a certain distance, check the tightening of the wheel hub bolts again to ensure that there is no looseness.
. Observe the stability of the vehicle during driving, and promptly investigate the cause if there are any abnormalities.IV. Other precautions
Follow operating procedures:
Strictly follow the operating steps and safety regulations in the vehicle maintenance manual and installation guide.
. Do not adjust equipment parameters or omit key steps without authorization.Environmental management:
Keep the installation environment clean and avoid debris falling into the tire hub.
. Regularly maintain and upkeep assembly tools and equipment to ensure their proper functioning.Emergency response:
Prepare fire extinguishing equipment and other emergency devices to prevent fires caused by heating equipment or electrical failures.
. Develop emergency plans, clarify emergency response procedures and responsible persons.