Where to Place the Jack?

1 Answers
McRuby
07/29/25 9:54pm
When changing a tire, the jack should be placed under the chassis, near the wheel, on the raised position. The operation of the jack should not be rushed; it should rise rhythmically and uniformly, and descend slowly. When using multiple jacks simultaneously, operate them synchronously. 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. Jacks can be categorized by structural features into three types: rack jacks, screw jacks, and hydraulic jacks. Below are detailed introductions: 1. Screw Jack: The screw jack's threads do not have a self-locking function and are equipped with a brake. Releasing the brake allows the load to descend quickly, reducing return time, but this type of jack is more complex in construction. Screw jacks can support heavy loads for extended periods, with a maximum lifting capacity of up to 100t, making them widely applicable. When fitted with a horizontal screw at the bottom, they can also enable small-distance horizontal movement of the load. 2. Hydraulic Jack: Used in hydraulic transmission systems as an intermediate medium, it plays a role in transmitting and converting energy. Additionally, it serves functions such as lubrication, corrosion prevention, cooling, and flushing of components within the hydraulic system. 3. Electric Jack: The electric jack is equipped with a pressure-retaining device to prevent overpressure. If overpressure occurs, the jack may not return to a certain position. Its special structure provides dual protection for the jack. When fitted with a diving device, it can achieve high travel with low height.
Was this review help?
1
2
Share
More Forum Discussions

Can Fuel Additives Be Added After Refueling?

New-generation fuel additives can be added either before or after refueling. The primary function of fuel additives is to compensate for vehicle issues caused by insufficient fuel quality through their formulations and ingredients. Functions of Fuel Additives: Clearing carbon deposits and cleaning the fuel system: The cleaning and activating agents in new-generation fuel additives help remove harmful substances such as gum deposits in fuel and engine carbon buildup. After five consecutive uses of fuel additives, carbon deposits on the exhaust pipe are significantly reduced, and components like the filter, throttle valve, and fuel system remain clean. Enhancing engine performance: The nano-components in new-generation fuel additives can adsorb and encapsulate gum deposits. Under high temperatures, they create gaseous "micro-explosions" in the combustion chamber, leading to secondary atomization of the fuel and promoting complete combustion, thereby boosting engine power. Over 90% of vehicles experience noticeable power improvement after the first use of fuel additives, especially when the car feels sluggish, is older, heavily loaded, or on long trips. How to Use Fuel Additives: Open the fuel tank cap and pour in a full bottle of gasoline additive, then fill the tank with gasoline. Avoid adding extra gasoline or additives before the current tank is used up. After driving 10,000 km, repeat the process by using another bottle of gasoline additive as recommended in the first step. It is important to emphasize that each use should involve a full bottle of additive per full tank of fuel. During use, the vehicle's emissions may produce an unusual odor, which is normal and does not indicate any damage to the vehicle.
5
4
Share

What Causes the EPC Light to Illuminate on the Volkswagen Bora Dashboard?

Possible reasons for the EPC light to illuminate include: A dirty car throttle that needs cleaning. A faulty brake system, in which case the brake light may also not illuminate. Issues with fuel quality, which can trigger the EPC warning light. EPC (Electronic Power Control) stands for Engine Electronic Power Control System. When a sensor malfunctions or detects abnormal conditions, the control system will take appropriate measures based on pre-set programs. Detailed explanations for other scenarios causing the EPC light to illuminate: Engine intake system malfunction: The EPC light will alert if the engine intake is obstructed or insufficient. Throttle malfunction: Carbon buildup is a common issue with throttles, and dirt accumulation can also affect intake, causing the indicator light to illuminate. Fuel system malfunction: Examples include substandard fuel, fuel degradation, or poor fuel atomization. Engine malfunction: Insufficient engine pressure or issues with components like the intake valve can also trigger the EPC light. ECU control unit malfunction: Such as interference with the car computer signals or false alarms from the car computer. Brake light malfunction: Situations like non-functioning brake lights, faulty brake switches, or brake wiring issues. Solutions for when the car's EPC indicator light illuminates: Troubleshoot intake system issues, use fuel with the appropriate octane rating, clean the throttle, etc. Remove carbon deposits from relevant parts. Re-flash ECU-related data. If the EPC light illuminates, the owner can first try turning off the engine and restarting it to see if the EPC light remains on. If it does not illuminate again, there may be no issue, possibly just the EPC indicator being affected. If the EPC light remains on or frequently illuminates, drive to the nearest service center for professional diagnosis and timely resolution of potential safety hazards. The full English name of EPC is Electronic-Power-Control, which translates to electronic power control. Most people refer to it as the engine electronic stability system. The EPC system primarily includes controllers and sensors related to the powertrain. When sensor data within the system is abnormal, the EPC system will take measures on the powertrain based on pre-set programs. Common EPC indicator lights generally display two colors: yellow and red. A yellow EPC warning light indicates that the car can still be driven, but you should proceed slowly to a service point for inspection. A red EPC warning light signifies a more serious issue, and you should pull over immediately and contact a repair professional. Continuing to drive could directly affect the car's core components or driving safety.
10
3
Share

What is the tire model of Lexus RX300?

There are two types of tire models for the Lexus RX300: 235/55R20 and 235/65R18. In 235/55R20, the first number 235 represents the tire width of 235MM, 55 indicates the tire's aspect ratio is 55%, meaning the section height is 55% of the width, and 20 represents the rim diameter of 20 inches. The letter "R" in the middle stands for radial tire. In 235/65R18, the first number 235 represents the tire width of 235MM, 65 indicates the tire's aspect ratio is 65%, meaning the section height is 65% of the width, and 18 represents the rim diameter of 18 inches. The letter "R" in the middle stands for radial tire. The Lexus RX300 is equipped with tires from brands such as Bridgestone, Dunlop, or Michelin, and the spare tire is of non-full size specification. If you want to replace the tires yourself, you can follow the steps below: Take out the spare tire and jack, place the jack under the frame of the tire to be replaced, ensuring the jack touches the metal part of the frame; Raise the jack until it supports the car. The jack should be positioned under the vehicle, check and ensure the jack is at a right angle to the ground; Remove the hub cover, loosen the nuts counterclockwise. Do not completely loosen the nuts, just enough to eliminate resistance. When loosening the nuts for the first time, keeping the tire on the ground ensures that the nuts turn instead of the tire; Turn the nuts counterclockwise until they come off. Repeat this step for all lug nuts, then completely remove the nuts; Place the new tire on the hub, carefully align the tire rim with the wheel bolts, install the lug nuts, and tighten them by hand until all nuts are concealed. At this point, the tire replacement is complete. In addition to the model, the tire also has the following common data marked on it: Tire cord material: Represented by Chinese pinyin, such as M-cotton cord, R-rayon cord, N-nylon cord, G-steel cord, ZG-steel radial cord tire. Speed rating: Indicates the maximum speed at which the tire can carry the specified load under specified conditions. Letters A to Z represent the certified speed ratings of tires from 4.8km/h to 300km/h. Common speed ratings include: Q: 160km/h; H: 210km/h; V: 240km/h; W: 270km/h; Y: 300km/h; Rim specification: Indicates the rim specification compatible with the tire for practical use, such as standard rim 5.00F.
1
4
Share

How Many Times Can You Retake the Subject 1 Test?

The "Regulations on the Application and Use of Motor Vehicle Driver's Licenses" clearly stipulates that the Subject 1 test can be taken twice on the same day. If the first attempt is unsuccessful, a free retake is allowed for the second attempt. If the second attempt also fails, the Subject 1 test for this session is terminated, and the applicant can only schedule another test after ten days. Subject 1, also known as the theoretical test or driver's theory test, is part of the motor vehicle driver's license assessment. The test content includes driving theory basics, road safety laws and regulations, local regulations, and related knowledge. The test is conducted on a computer with a time limit of 45 minutes. To pass the Subject 1 test, a score of 90 out of 100 is required. The test consists of 100 questions, including single-choice and true/false questions, with each question worth 1 point. If 11 questions are answered incorrectly during the test, the system will automatically submit the test and end the session. Subject 1 test content includes: driver's license and motor vehicle management regulations; road traffic conditions and regulations; road traffic safety violations and penalties; road traffic accident handling regulations; basic knowledge of motor vehicles; local regulations; knowledge of braking systems and safety devices for large and medium-sized passenger and freight vehicles; specialized knowledge for wheeled self-propelled machinery, trams, and trolleybuses. Subject 1 test precautions: Candidates should dress appropriately for the test; no slippers are allowed. Electronic devices and bags are prohibited in the examination hall. Bring your ID card and queue to enter the waiting area. Observe the precautions and procedures on the large screen, and store personal belongings in a locker before entering the examination hall. Upon entering, the identity verification station will assign a seat. Once seated, begin the test. Ensure the camera is aligned correctly and adhere to test discipline. If you fail the first attempt, a retake is allowed on the same day. If you fail again, you must pay to reschedule. After the test, queue to collect your score report and sign it. Failure to sign will render the test invalid. There is no limit to the number of times you can schedule the Subject 1 test. Each subject test allows one retake if the first attempt fails. If you do not take the retake or fail the retake, the test session is terminated, and the applicant must reschedule. In contrast, Subject 2 and Subject 3 tests allow only five attempts. Subject 2 and Subject 3 tests can be rescheduled after ten days. If the Subject 3 safety and civilized driving knowledge test is failed, the passed road driving skills test results remain valid. The driver's license test consists of three subjects: Subject 1, Subject 2, and Subject 3. Subject 1 refers to the road traffic safety laws, regulations, and related knowledge test. Subject 2 refers to the field driving skills test. Subject 3 is divided into two parts: road driving skills and safety and civilized driving knowledge tests. The safety and civilized driving knowledge test is conducted after Subject 3, so it is commonly referred to as Subject 4. However, the official term (as per the Ministry of Public Security Order No. 123) does not include "Subject 4."
15
0
Share

Why Are There No Used Cars for the Li ONE?

Because the Li ONE has relatively low brand recognition and poor resale value, most used car dealers are unwilling to accept this model. Below are the relevant details: Exterior and Interior: In terms of body layout, the 7-seater version has been discontinued, and the third-row space has been increased by 41mm. A newly designed steering wheel is adopted. The body comes standard with four metallic paint colors: black, white, gray, and silver, along with three special edition colors—Baby-Blue, Deep-Green, and Tech-Blue—while the current blue option has been discontinued. Powertrain: The Li ONE's powertrain system consists of a 1.2T three-cylinder direct-injection engine + a 40.5kWh ternary lithium battery + dual motors (100kW front and 140kW rear) + a 100kWh generator.
10
3
Share

How many production bases does FAW-Volkswagen have?

FAW-Volkswagen has production bases in Changchun, Beijing, Shanghai, Guangzhou, and Wuhan. The following is relevant information about FAW-Volkswagen: Introduction to FAW-Volkswagen: FAW-Volkswagen Automobile Co., Ltd. is a large-scale joint venture passenger car enterprise jointly invested by China FAW Group Corporation, Volkswagen AG of Germany, and Audi AG of Germany. FAW-Volkswagen's vehicle models: FAW-Volkswagen's vehicle models include SUV models such as Talagon, Tayron, T-Roc, and Tacqua; and sedan models such as CC, Magotan, Sagitar, Golf, and C-Trek.
6
4
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.