1. On a three-lane road, when you overtake the car in front of you (in the middle lane) and return to the middle lane, if there is a car behind you that overtakes from the right at a faster speed and slightly ahead of you merging into the middle lane, if you only look at the front or the rearview mirror, your car's front may scrape the back of the other car. Since both cars are overtaking at high speeds, it might be too close to react upon noticing. This kind of scraping collision and similar situations often occur on multi-lane urban expressways where there are many cars traveling fast and frequently switching lanes for overtaking. Focusing on just one point and neglecting others can easily lead to danger.
Numbness Index: 6 Danger Index: 6
Proposal: You must have eyes on all six directions and ears listening to all eight. For beginners, "no matter how heavily surrounded by enemies, I remain steadfast."
2. The two side pillars in the driving cabin can completely block out a bicycle or pedestrian. Similarly, when purchasing a fire truck, one would first look at fire truck pictures; the inside rearview mirror will also block the 45-degree line of sight to the right at different levels. At a crossroads without traffic lights in a bustling downtown area with mixed pedestrian and vehicle traffic, multiple targets can distract attention, and pedestrians entering blind spots may go unnoticed. If pedestrians move parallel to the car, these blind spots can last several seconds. When the car accelerates or turns, pedestrians will suddenly appear, causing panic. Although collisions may not be severe, damaging the car is painful, and encountering difficult individuals can be quite troublesome.
Numbness Index: 3 Danger Index: 3
Solution: Drive slowly to allow sufficient time to observe everywhere, focusing on the three blind spots, swaying and looking around.
3. On narrower streets (especially four-lane roads), as most cars have tinted windows making it hard to see inside, when passing, be cautious of people in the cars on your right suddenly opening their doors. These roads are usually small streets or within residential areas, and in case of an accident, it might be hard to reason with others. Replacing a door is a minor issue, but injuring someone’s hand could be serious.
Numbness Index: 4 Danger Index: 4
Measure: Slow down, honk the horn, and stay as much in the middle of the road as possible.
4. Following another car while overtaking is a common scenario. Normally, the car in front overtakes freely and moves straight into the adjacent lane, leaving room to squeeze between two cars. However, when an oncoming car is fast, the car in front will abruptly make a sharp turn into the lane, leaving you stranded in the overtaking lane. In such cases, with no way to escape, it becomes even more dangerous if the car in front is larger and blocks the view of the oncoming car, which may start accelerating as the car in front overtakes. This situation mostly occurs on two-lane urban highways. I once had a similar experience, and the two vehicles stopped about 3 meters apart, leaving the driver momentarily stunned for over 10 seconds, fortunately without an accident.
Numbness Index: 5 Danger Index: 5
Measure: While overtaking, ensure you clearly see the direction of oncoming traffic. Do not follow large vehicles while overtaking; wait until they have successfully merged before proceeding.
5. On rural roads, sometimes farmers dry wheat or there are short stretches of gravel due to road repairs. Many people pass through these areas at high speeds because they seem short. This is extremely dangerous. In emergency situations, people instinctively brake or swerve, but on such surfaces, the car can behave unpredictably, veering in unexpected directions. There was a report of 3 accidents occurring on such surfaces within 5 days, resulting in 6 fatalities.
Numbness Index: 3 Danger Index: 10
6. After driving a long stretch of mountain roads, when you encounter a long, open, and straight downhill section, reducing gears and braking creates a balance between gravity and braking force, allowing the car to glide downhill at a steady speed. During this time, you might feel tempted to relax, taking your foot off the brake or accelerator to stretch. It's best not to do so, as your foot loses its reference point, and danger grows stealthily. If an emergency arises, can you accurately place your foot on the brake? As a beginner, would you mistakenly step on the accelerator?
Numbness Index: 2 Danger Index: 2
Warning: Even though your legs and feet may feel tired, it's still recommended they remain in combat positions.
7. On a broad and gentle highway, when overtaking and running parallel to the car in front, suddenly a car appears from underground! The situation is as follows: the road is straight at both ends but has a wave-like valley in the middle. If it were an up-and-down slope, most people would notice, but this kind of slope can confuse the eyes! Accidents caused by terrain changes often occur at intersections where mountainous slopes, bends, and other terrain changes happen. Drivers overlook sudden terrain changes, leading to accidents. Here, the concept of "accident-prone terrain" is introduced. Please pay attention to changes in terrain, reduce speed promptly, and avoid leaving behind an "accident-prone area" sign due to your own mistakes!
Numbness Index: 7 Danger Index: 7
Proposal: As the old saying goes, "a long-term perspective is always beneficial." Strive to cultivate sensitivity to hazardous areas.
8. Generally, drivers in urban areas are very cautious about traffic rules. However, on rural roads, rarely does any vehicle adhere to traffic regulations, violating them as frequently as blinking. Why? No police officers around! Would you then relax your vigilance and follow the crowd? Let me tell you, police officers might be lurking somewhere waiting for you to fall into their trap! Of course, police won't be in desolate places; they prefer company, like patrol cars and fees. Just watch out for those wearing big caps. Also, if you drive too fast, police won't be able to catch up. So, police will appear where the road is relatively busy, speeds aren't too high, visibility isn't great, and you're feeling overly confident. At such times, your risk is losing 50-200 yuan.
Numbness Index: 10 Danger Index: 1
Advice: Police officers are the ones who appear when you least expect them!
9. Driving on suburban roads, if a large truck closely follows you without letting up, wouldn't you feel uneasy? If not, wake up! If an emergency arises ahead, you can brake, but can the large truck stop in time? If you can't shake off the large truck (indicating it's also moving fast), the best strategy is to signal a turn, slow down, pull over, and let the truck go first.
Numbness Index: 5 Danger Index: 9
Warning: Under equal distance and speed conditions, the risk and damage level of a large truck rear-ending you far exceeds that of a smaller vehicle. If unable to create distance from large trucks, it's safer to follow them rather than have them follow you.
10. Overtaking is a high-risk period during car travel (higher speed, closer proximity). One danger is the car in front noticing a situation and suddenly swerving left, squeezing or rear-ending the following car. Most people notice this. What's often overlooked is when something or someone crosses the road from the outside while the following car is directly behind the overtaking car. Neither the person nor the following car sees each other. The pedestrian rushes across, the following car accelerates hurriedly, and by the time it overtakes the car in front, the pedestrian emerges from the front car. Encountering the pedestrian at this moment leaves no chance for survival. A few years ago, I saw such an incident on CCTV where the pedestrian was thrown 2-3 meters high, spun a few times in the air, and died instantly. Such dangers are common on semi-closed expressways; don't be careless.
The 3517CF2-010 type parking brake valve (also known as the hand control valve) is produced by Chongqing Diesel Automobile Accessories Factory. This valve is optional on Dongfeng, Jiefang, Steyr, and other series diesel vehicles. Its working principle (see Fig. 3-5) is as follows: when the handle is in the 0~10 degree range, the diesel vehicle's parking brake is fully released, and it is in driving mode; when the handle is in the 73-degree locked position, the train is in a fully braked state; when the handle is at the 82-degree inspection position, the tractor's parking brake is in the braking state, but the trailer is in a fully released braking state.
When the handle moves from 73 degrees to 0 degrees, the handle cam pushes down the large piston F, compresses the balancing spring 6, and pushes the piston 2 downward, closing the exhaust valve 4 and fully opening the intake valve 5. The auxiliary valve's intake valve 3 opens, allowing compressed air from chamber C to enter chamber A, which then splits into two routes. One route enters the spring brake chamber to release the tractor's parking brake; the other enters the trailer brake valve to release the trailer's parking brake. When the handle is within the 0~10 degree range, the diesel vehicle's parking brake is in a fully released state.
When the handle moves from 0 degrees to 55 degrees and 73 degrees, the large piston F, balancing spring 5, and balancing piston 2 move upward, opening the exhaust valve 4 and closing the intake valve 5; the auxiliary valve's intake valve 3 closes. The output pressure decreases linearly to zero as the handle angle increases. When the handle is within the 55~73 degree range, the entire diesel vehicle is in a fully braked state. When the handle is at 73 degrees, the entire diesel vehicle is in a fully braked state, and the handle is locked.
When the handle reaches the 82-degree inspection position from 73 degrees, the auxiliary valve's intake valve 3 opens, releasing the trailer's braking effect. At this time, it is possible to check whether the diesel vehicle can remain stationary on a slope under the sole effect of the tractor's parking brake. Upon releasing the handle, it automatically returns to the parking brake lock position.
Faults: When the handle is within the 0~10 degree range, the vehicle's parking brake is fully released and in driving mode. If the trailer brake chamber does not release and the higher the air pressure, the greater the pressure in the brake chamber, it indicates that the air pressure from chamber A has leaked into chambers B and D, entering the trailer brake chamber, due to aging internal piston O-ring seals and foreign objects blocking the sealed valve, causing air leakage. This can be checked and replaced through the lower body and middle body.
When the hand control valve moves from 0 degrees to 55 degrees and 73 degrees, if there are foreign objects inside the hand control valve, damaged O-ring seals, worn pistons, or stuck inner chambers or parts, normal braking effects cannot be achieved.
Removal: Remove the lower end cover bolts of the hand control valve, take out the inner chamber piston, inspect, clean, and properly reassemble. The service life of the hand control valve is approximately 50,000 km, and it should be disassembled for a comprehensive inspection without a dedicated repair kit, providing convenient conditions for maintenance.
Adjustment:
(1) Place the handle in the parking brake lock position, inflate the inlet port N to reach a pressure of 800 kPa, hold for 5 minutes without leaks, although slight leakage at the exhaust port is allowed.
When the handle is at the 10-degree position, the outlet pressure must drop to 550~620 kPa; when the handle is at the 73-degree position, the outlet pressure must drop to zero. Release the handle, and it should automatically return to the driving position. At this time, the outlet pressure must be 800 kPa.
The above content is jointly released by the Official Website of Sanitation Garbage Trucks (http://www.clwlu.com/)|www_clwlu_com and Garbage Truck Manufacturers (http://www.clwwcw.com/)|www_clwwcw_com. For more exciting content: Garbage Truck Manufacturer 2 uses computer network and database technology and requires distance adjustment. If the transmission shaft of the articulated aerial work platform encounters a fault, the first inspection method involves checking the battery as well.