How to Use a Jack?
3 Answers
Usage method of a jack: 1. For manual transmission vehicles, pull up the handbrake and shift the transmission into 1st gear or reverse gear; for automatic transmission vehicles, also pull up the handbrake and shift the transmission to the P position. 2. Place the jack under the vehicle for lifting operation. When the top of the jack contacts the chassis, ensure that the support is properly positioned. 3. After confirming it is securely fixed, continue lifting and rotate it using the accompanying wrench and sleeve. Precautions for using a jack: 1. When the vehicle is lifted by the jack, do not start the engine, as the vibration of the engine or the rotation of the wheels may cause the vehicle to slip off the jack, posing a danger. 2. There are fixed positions for using the jack; do not support the jack on the bumper or crossbeam. 3. Maintenance personnel should not work under a vehicle that is not properly supported. When changing wheels, passengers should not remain in the vehicle, as movement may cause the vehicle to slip off the jack.
From my years of experience in auto repair, using a jack is no trivial matter—carelessness can easily lead to accidents. First, I always find a hard, flat surface like concrete or a garage floor, avoiding sand or slopes to prevent the car from slipping. Park the vehicle securely, engage the parking brake, shift automatics to 'P' or manuals to first gear to avoid unintended movement. Then locate the lift point, usually a small raised mark on the frame near the wheel; jacking elsewhere, like plastic parts, can damage the undercarriage, costing a fortune to fix. Position the jack firmly and crank the handle slowly until the tire lifts a few centimeters off the ground—then stop. But never rely solely on the jack in critical moments—always use dedicated jack stands for secure support before working. After finishing, lower the car cautiously and gradually to prevent sudden drops. I've seen many cut corners, only to end up paying for repairs or injuries later. Cultivating the habit of double-checking safety conditions is paramount.
As a car enthusiast, I often use a jack to change tires myself. I choose locations with solid ground like parking lots and make sure the car is securely parked with the handbrake engaged. Finding the correct lifting point is crucial—refer to the vehicle manual or metal markers near the wheel axle, avoiding contact with the side skirts. After positioning the jack, lift steadily without rushing, stopping once the tire is off the ground to proceed with the replacement. During the process, ensure tools don’t slip, and wearing anti-slip shoes is advisable. Here’s a lesson I learned: during a road trip, I had a flat tire on the highway and nearly misaligned the jack—fortunately, I adjusted in time to prevent damage. Now, I always carry spare anti-slip pads or wooden planks for uneven surfaces. These skills make DIY more enjoyable, but safety comes first to truly savor the journey.
