Where to Position the Jack When Changing Tires?
2 Answers
When changing tires, the jack should be positioned under the chassis near the wheel, on the raised area. The jack should be operated steadily and rhythmically when lifting, and lowered slowly. If multiple jacks are used simultaneously, they should be operated in sync. After using the jack, conduct a thorough inspection to check the hydraulic pressure and potential hazards, perform maintenance, and store it in an appropriate place. Here are some precautions when using a jack: 1. Temperature Considerations: The standard working fluid for most jacks is YB-N32 hydraulic oil. If the ambient temperature is below 10°C, switch to YB-N22 hydraulic oil; if it exceeds 40°C, use YB-N46 hydraulic oil. The normal operating temperature range for the jack pump is 10–50°C. If the oil temperature is too high, implement cooling measures or stop the pump. If the oil temperature is too low, use heating measures or operate at low pressure to raise the temperature. 2. Regular Inspections: High-pressure hoses are pressure-tested at 1.25 times the rated pressure before leaving the factory. Due to aging of the rubber material, users should perform regular inspections every six months during prolonged use. If leaks, bulges, or bursts occur during pressure testing, the hose must be replaced. Avoid kinking or sharp bends when using the hose, and keep a safe distance to prevent injury from bursting. 3. Annual Pump Maintenance: Clean all parts with kerosene during annual maintenance. Protect the mating surfaces of the jack from damage. After reassembly, ensure all moving parts operate smoothly without obstruction.
Last time I changed a tire, I almost made a mistake—the placement of the jack is crucial. The correct spot is usually under the frame near the wheel, marked by indicators or raised points called jacking points. Avoid improper spots like the fuel tank, suspension, or door sills, as they can damage the car. I remember my first time using it—I found a flat, hard surface, pulled the handbrake tight, and shifted into Park. If the position isn’t clear, crouch down and check; some cars have small arrow icons inside the wheel well. Align the jack precisely and lift steadily. Safety can’t be overlooked—if you jack the wrong spot, body damage can be costly to repair. Before changing a tire, it’s best to check the owner’s manual for the exact location. After replacing the wheel, don’t forget to tighten the lug nuts in a crisscross pattern to avoid misalignment. Take your time with the whole process—safety comes first.
